From c5e8669e9ccc655c2c2be70f09bf22d210d55ac7 Mon Sep 17 00:00:00 2001
From: Gerard Caulfield <git@caulfield.me>
Date: Tue, 10 May 2016 00:04:42 +1000
Subject: [PATCH] Simplify matching logic in tests

Simplify matching logic by adding a custom matcher which
handles the task of normalisation of object IDs instead of
calling gsub many times throughout the test code.

This allows our tests to focus more on what needs to be tested
instead obfuscating the tests with logic unrelated to what
the test is trying to cover.

It also allows making the normalisation code more robust so
there is less chance of an accidental match or typo slipping
in.

The change also replaces the arbitary default object IDs with a
string that makes it very obvious that it is just a placeholder.
---
 spec/ext/active_record_spec.rb | 342 ++++++++++++++++-----------------
 spec/ext/mongo_mapper_spec.rb  |  43 ++---
 spec/ext/mongoid_spec.rb       |   5 +-
 spec/ext/ripple_spec.rb        |   4 +-
 spec/objects_spec.rb           |  20 +-
 spec/spec_helper.rb            |  20 ++
 6 files changed, 223 insertions(+), 211 deletions(-)

diff --git a/spec/ext/active_record_spec.rb b/spec/ext/active_record_spec.rb
index 6b67ac3..be3aba2 100644
--- a/spec/ext/active_record_spec.rb
+++ b/spec/ext/active_record_spec.rb
@@ -17,9 +17,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
     end
 
     it "display single record" do
-      out = @ap.send(:awesome, @diana)
+      out = @ap.awesome(@diana)
       str = <<-EOS.strip
-#<User:0x01234567> {
+#<User:placeholder_id> {
          :admin => false,
     :created_at => ?,
             :id => nil,
@@ -32,21 +32,21 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
       else
         str.sub!('?', '1992-10-10 12:30:00 UTC')
       end
-      expect(out.gsub(/0x([a-f\d]+)/, "0x01234567")).to eq(str)
+      expect(out).to be_similar_to(str)
     end
 
     it "display multiple records" do
-      out = @ap.send(:awesome, [ @diana, @laura ])
+      out = @ap.awesome([ @diana, @laura ])
       str = <<-EOS.strip
 [
-    [0] #<User:0x01234567> {
+    [0] #<User:placeholder_id> {
              :admin => false,
         :created_at => ??,
                 :id => nil,
               :name => "Diana",
               :rank => 1
     },
-    [1] #<User:0x01234567> {
+    [1] #<User:placeholder_id> {
              :admin => true,
         :created_at => ?!,
                 :id => nil,
@@ -62,23 +62,23 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
         str.sub!('??', '1992-10-10 12:30:00 UTC')
         str.sub!('?!', '2003-05-26 14:15:00 UTC')
       end
-      expect(out.gsub(/0x([a-f\d]+)/, "0x01234567")).to eq(str)
+      expect(out).to be_similar_to(str)
     end
 
     it "display multiple records on a relation" do
       @diana.save
       @laura.save
-      out = @ap.send(:awesome, User.all)
+      out = @ap.awesome(User.all)
       str = <<-EOS.strip
 [
-    [0] #<User:0x01234567> {
+    [0] #<User:placeholder_id> {
              :admin => false,
         :created_at => ??,
                 :id => 1,
               :name => "Diana",
               :rank => 1
     },
-    [1] #<User:0x01234567> {
+    [1] #<User:placeholder_id> {
              :admin => true,
         :created_at => ?!,
                 :id => 2,
@@ -94,7 +94,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
         str.sub!('??', '1992-10-10 12:30:00 UTC')
         str.sub!('?!', '2003-05-26 14:15:00 UTC')
       end
-      expect(out.gsub(/0x([a-f\d]+)/, "0x01234567")).to eq(str)
+      expect(out).to be_similar_to(str)
     end
   end
 
@@ -108,12 +108,12 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
     end
 
     it "display single record" do
-      out = @ap.send(:awesome, @diana)
+      out = @ap.awesome(@diana)
 
       if activerecord_4_2?
         if RUBY_VERSION > '1.9.3'
           str = <<-EOS.strip
-#<User:0x01234567
+#<User:placeholder_id
     @_start_transaction_state = {},
     @aggregation_cache = {},
     @destroyed = false,
@@ -131,13 +131,13 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
     ],
     @transaction_state = nil,
     @txn = nil,
-    attr_accessor :attributes = #<ActiveRecord::AttributeSet:0x01234567
-        @attributes = #<ActiveRecord::LazyAttributeHash:0x01234567
+    attr_accessor :attributes = #<ActiveRecord::AttributeSet:placeholder_id
+        @attributes = #<ActiveRecord::LazyAttributeHash:placeholder_id
             @additional_types = {},
             @delegate_hash = {
-                     "admin" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                     "admin" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                     attr_reader :name = "admin",
-                    attr_reader :type = #<ActiveRecord::Type::Boolean:0x01234567
+                    attr_reader :type = #<ActiveRecord::Type::Boolean:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
@@ -145,9 +145,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                     attr_reader :value = false,
                     attr_reader :value_before_type_cast = false
                 >,
-                "created_at" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                "created_at" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                     attr_reader :name = "created_at",
-                    attr_reader :type = #<ActiveRecord::Type::DateTime:0x01234567
+                    attr_reader :type = #<ActiveRecord::Type::DateTime:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
@@ -155,9 +155,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                     attr_reader :value = 1992-10-10 12:30:00 UTC,
                     attr_reader :value_before_type_cast = "1992-10-10 12:30:00"
                 >,
-                        "id" => #<ActiveRecord::Attribute::FromDatabase:0x01234567
+                        "id" => #<ActiveRecord::Attribute::FromDatabase:placeholder_id
                     attr_reader :name = "id",
-                    attr_reader :type = #<ActiveRecord::Type::Integer:0x01234567
+                    attr_reader :type = #<ActiveRecord::Type::Integer:placeholder_id
                         @range = -2147483648...2147483648,
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
@@ -166,9 +166,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                     attr_reader :value = nil,
                     attr_reader :value_before_type_cast = nil
                 >,
-                      "name" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                      "name" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                     attr_reader :name = "name",
-                    attr_reader :type = #<ActiveRecord::ConnectionAdapters::SQLite3String:0x01234567
+                    attr_reader :type = #<ActiveRecord::ConnectionAdapters::SQLite3String:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
@@ -176,9 +176,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                     attr_reader :value = "Diana",
                     attr_reader :value_before_type_cast = "Diana"
                 >,
-                      "rank" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                      "rank" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                     attr_reader :name = "rank",
-                    attr_reader :type = #<ActiveRecord::Type::Integer:0x01234567
+                    attr_reader :type = #<ActiveRecord::Type::Integer:placeholder_id
                         @range = -2147483648...2147483648,
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
@@ -190,28 +190,28 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
             },
             @materialized = false,
             @types = {
-                     "admin" => #<ActiveRecord::Type::Boolean:0x01234567
+                     "admin" => #<ActiveRecord::Type::Boolean:placeholder_id
                     attr_reader :limit = nil,
                     attr_reader :precision = nil,
                     attr_reader :scale = nil
                 >,
-                "created_at" => #<ActiveRecord::Type::DateTime:0x01234567
+                "created_at" => #<ActiveRecord::Type::DateTime:placeholder_id
                     attr_reader :limit = nil,
                     attr_reader :precision = nil,
                     attr_reader :scale = nil
                 >,
-                        "id" => #<ActiveRecord::Type::Integer:0x01234567
+                        "id" => #<ActiveRecord::Type::Integer:placeholder_id
                     @range = -2147483648...2147483648,
                     attr_reader :limit = nil,
                     attr_reader :precision = nil,
                     attr_reader :scale = nil
                 >,
-                      "name" => #<ActiveRecord::ConnectionAdapters::SQLite3String:0x01234567
+                      "name" => #<ActiveRecord::ConnectionAdapters::SQLite3String:placeholder_id
                     attr_reader :limit = nil,
                     attr_reader :precision = nil,
                     attr_reader :scale = nil
                 >,
-                      "rank" => #<ActiveRecord::Type::Integer:0x01234567
+                      "rank" => #<ActiveRecord::Type::Integer:placeholder_id
                     @range = -2147483648...2147483648,
                     attr_reader :limit = nil,
                     attr_reader :precision = nil,
@@ -239,7 +239,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
           EOS
         else
           str = <<-EOS.strip
-#<User:0x01234567
+#<User:placeholder_id
     @_start_transaction_state = {},
     @aggregation_cache = {},
     @destroyed = false,
@@ -257,14 +257,14 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
     ],
     @transaction_state = nil,
     @txn = nil,
-    attr_accessor :attributes = #<ActiveRecord::AttributeSet:0x01234567
-        attr_reader :attributes = #<ActiveRecord::LazyAttributeHash:0x01234567
+    attr_accessor :attributes = #<ActiveRecord::AttributeSet:placeholder_id
+        attr_reader :attributes = #<ActiveRecord::LazyAttributeHash:placeholder_id
             @materialized = false,
             attr_reader :additional_types = {},
             attr_reader :delegate_hash = {
-                     "admin" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                     "admin" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                     attr_reader :name = "admin",
-                    attr_reader :type = #<ActiveRecord::Type::Boolean:0x01234567
+                    attr_reader :type = #<ActiveRecord::Type::Boolean:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
@@ -272,9 +272,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                     attr_reader :value = false,
                     attr_reader :value_before_type_cast = false
                 >,
-                "created_at" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                "created_at" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                     attr_reader :name = "created_at",
-                    attr_reader :type = #<ActiveRecord::Type::DateTime:0x01234567
+                    attr_reader :type = #<ActiveRecord::Type::DateTime:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
@@ -282,9 +282,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                     attr_reader :value = 1992-10-10 12:30:00 UTC,
                     attr_reader :value_before_type_cast = "1992-10-10 12:30:00"
                 >,
-                        "id" => #<ActiveRecord::Attribute::FromDatabase:0x01234567
+                        "id" => #<ActiveRecord::Attribute::FromDatabase:placeholder_id
                     attr_reader :name = "id",
-                    attr_reader :type = #<ActiveRecord::Type::Integer:0x01234567
+                    attr_reader :type = #<ActiveRecord::Type::Integer:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :range = -2147483648...2147483648,
@@ -293,9 +293,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                     attr_reader :value = nil,
                     attr_reader :value_before_type_cast = nil
                 >,
-                      "name" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                      "name" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                     attr_reader :name = "name",
-                    attr_reader :type = #<ActiveRecord::ConnectionAdapters::SQLite3String:0x01234567
+                    attr_reader :type = #<ActiveRecord::ConnectionAdapters::SQLite3String:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
@@ -303,9 +303,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                     attr_reader :value = "Diana",
                     attr_reader :value_before_type_cast = "Diana"
                 >,
-                      "rank" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                      "rank" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                     attr_reader :name = "rank",
-                    attr_reader :type = #<ActiveRecord::Type::Integer:0x01234567
+                    attr_reader :type = #<ActiveRecord::Type::Integer:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :range = -2147483648...2147483648,
@@ -316,28 +316,28 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 >
             },
             attr_reader :types = {
-                     "admin" => #<ActiveRecord::Type::Boolean:0x01234567
+                     "admin" => #<ActiveRecord::Type::Boolean:placeholder_id
                     attr_reader :limit = nil,
                     attr_reader :precision = nil,
                     attr_reader :scale = nil
                 >,
-                "created_at" => #<ActiveRecord::Type::DateTime:0x01234567
+                "created_at" => #<ActiveRecord::Type::DateTime:placeholder_id
                     attr_reader :limit = nil,
                     attr_reader :precision = nil,
                     attr_reader :scale = nil
                 >,
-                        "id" => #<ActiveRecord::Type::Integer:0x01234567
+                        "id" => #<ActiveRecord::Type::Integer:placeholder_id
                     attr_reader :limit = nil,
                     attr_reader :precision = nil,
                     attr_reader :range = -2147483648...2147483648,
                     attr_reader :scale = nil
                 >,
-                      "name" => #<ActiveRecord::ConnectionAdapters::SQLite3String:0x01234567
+                      "name" => #<ActiveRecord::ConnectionAdapters::SQLite3String:placeholder_id
                     attr_reader :limit = nil,
                     attr_reader :precision = nil,
                     attr_reader :scale = nil
                 >,
-                      "rank" => #<ActiveRecord::Type::Integer:0x01234567
+                      "rank" => #<ActiveRecord::Type::Integer:placeholder_id
                     attr_reader :limit = nil,
                     attr_reader :precision = nil,
                     attr_reader :range = -2147483648...2147483648,
@@ -366,12 +366,12 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
         end
       elsif activerecord_4_1?
         str = <<-EOS.strip
-#<User:0x01234567
+#<User:placeholder_id
     @_start_transaction_state = {},
     @aggregation_cache = {},
     @attributes_cache = {},
     @column_types = {
-             "admin" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+             "admin" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
             attr_accessor :coder = nil,
             attr_accessor :primary = false,
             attr_reader :default = nil,
@@ -384,7 +384,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
             attr_reader :sql_type = "boolean",
             attr_reader :type = :boolean
         >,
-        "created_at" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+        "created_at" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
             attr_accessor :coder = nil,
             attr_accessor :primary = false,
             attr_reader :default = nil,
@@ -397,7 +397,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
             attr_reader :sql_type = "datetime",
             attr_reader :type = :datetime
         >,
-                "id" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                "id" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
             attr_accessor :coder = nil,
             attr_accessor :primary = true,
             attr_reader :default = nil,
@@ -410,7 +410,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
             attr_reader :sql_type = "INTEGER",
             attr_reader :type = :integer
         >,
-              "name" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+              "name" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
             attr_accessor :coder = nil,
             attr_accessor :primary = false,
             attr_reader :default = nil,
@@ -423,7 +423,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
             attr_reader :sql_type = "varchar(255)",
             attr_reader :type = :string
         >,
-              "rank" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+              "rank" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
             attr_accessor :coder = nil,
             attr_accessor :primary = false,
             attr_reader :default = nil,
@@ -466,12 +466,12 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
         EOS
       elsif activerecord_4_0?
         str = <<-EOS.strip
- #<User:0x01234567
+ #<User:placeholder_id
     @_start_transaction_state = {},
     @aggregation_cache = {},
     @attributes_cache = {},
     @column_types = {
-             "admin" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+             "admin" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
             attr_accessor :coder = nil,
             attr_accessor :primary = false,
             attr_reader :default = nil,
@@ -484,7 +484,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
             attr_reader :sql_type = "boolean",
             attr_reader :type = :boolean
         >,
-        "created_at" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+        "created_at" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
             attr_accessor :coder = nil,
             attr_accessor :primary = false,
             attr_reader :default = nil,
@@ -497,7 +497,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
             attr_reader :sql_type = "datetime",
             attr_reader :type = :datetime
         >,
-                "id" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                "id" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
             attr_accessor :coder = nil,
             attr_accessor :primary = true,
             attr_reader :default = nil,
@@ -510,7 +510,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
             attr_reader :sql_type = "INTEGER",
             attr_reader :type = :integer
         >,
-              "name" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+              "name" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
             attr_accessor :coder = nil,
             attr_accessor :primary = false,
             attr_reader :default = nil,
@@ -523,7 +523,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
             attr_reader :sql_type = "varchar(255)",
             attr_reader :type = :string
         >,
-              "rank" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+              "rank" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
             attr_accessor :coder = nil,
             attr_accessor :primary = false,
             attr_reader :default = nil,
@@ -568,7 +568,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
       elsif activerecord_3_2?
         if RUBY_VERSION > '1.9.3'
           str = <<-EOS.strip
-#<User:0x01234567
+#<User:placeholder_id
     @aggregation_cache = {},
     @attributes_cache = {},
     @destroyed = false,
@@ -595,7 +595,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
           EOS
         else
           str = <<-EOS.strip
-#<User:0x01234567
+#<User:placeholder_id
     @aggregation_cache = {},
     @attributes_cache = {},
     @destroyed = false,
@@ -623,17 +623,17 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
         end
       end
       str.sub!('?', '1992-10-10 12:30:00')
-      expect(out.gsub(/0x([a-f\d]+)/, "0x01234567")).to eq(str)
+      expect(out).to be_similar_to(str)
     end
 
     it "display multiple records" do
-      out = @ap.send(:awesome, [ @diana, @laura ])
+      out = @ap.awesome([ @diana, @laura ])
 
       if activerecord_4_2?
         if RUBY_VERSION > '1.9.3'
           str = <<-EOS.strip
 [
-    [0] #<User:0x01234567
+    [0] #<User:placeholder_id
         @_start_transaction_state = {},
         @aggregation_cache = {},
         @destroyed = false,
@@ -651,13 +651,13 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
         ],
         @transaction_state = nil,
         @txn = nil,
-        attr_accessor :attributes = #<ActiveRecord::AttributeSet:0x01234567
-            @attributes = #<ActiveRecord::LazyAttributeHash:0x01234567
+        attr_accessor :attributes = #<ActiveRecord::AttributeSet:placeholder_id
+            @attributes = #<ActiveRecord::LazyAttributeHash:placeholder_id
                 @additional_types = {},
                 @delegate_hash = {
-                         "admin" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                         "admin" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                         attr_reader :name = "admin",
-                        attr_reader :type = #<ActiveRecord::Type::Boolean:0x01234567
+                        attr_reader :type = #<ActiveRecord::Type::Boolean:placeholder_id
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
                             attr_reader :scale = nil
@@ -665,9 +665,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                         attr_reader :value = false,
                         attr_reader :value_before_type_cast = false
                     >,
-                    "created_at" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                    "created_at" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                         attr_reader :name = "created_at",
-                        attr_reader :type = #<ActiveRecord::Type::DateTime:0x01234567
+                        attr_reader :type = #<ActiveRecord::Type::DateTime:placeholder_id
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
                             attr_reader :scale = nil
@@ -675,9 +675,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                         attr_reader :value = 1992-10-10 12:30:00 UTC,
                         attr_reader :value_before_type_cast = "1992-10-10 12:30:00"
                     >,
-                            "id" => #<ActiveRecord::Attribute::FromDatabase:0x01234567
+                            "id" => #<ActiveRecord::Attribute::FromDatabase:placeholder_id
                         attr_reader :name = "id",
-                        attr_reader :type = #<ActiveRecord::Type::Integer:0x01234567
+                        attr_reader :type = #<ActiveRecord::Type::Integer:placeholder_id
                             @range = -2147483648...2147483648,
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
@@ -686,9 +686,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                         attr_reader :value = nil,
                         attr_reader :value_before_type_cast = nil
                     >,
-                          "name" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                          "name" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                         attr_reader :name = "name",
-                        attr_reader :type = #<ActiveRecord::ConnectionAdapters::SQLite3String:0x01234567
+                        attr_reader :type = #<ActiveRecord::ConnectionAdapters::SQLite3String:placeholder_id
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
                             attr_reader :scale = nil
@@ -696,9 +696,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                         attr_reader :value = "Diana",
                         attr_reader :value_before_type_cast = "Diana"
                     >,
-                          "rank" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                          "rank" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                         attr_reader :name = "rank",
-                        attr_reader :type = #<ActiveRecord::Type::Integer:0x01234567
+                        attr_reader :type = #<ActiveRecord::Type::Integer:placeholder_id
                             @range = -2147483648...2147483648,
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
@@ -710,28 +710,28 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 },
                 @materialized = false,
                 @types = {
-                         "admin" => #<ActiveRecord::Type::Boolean:0x01234567
+                         "admin" => #<ActiveRecord::Type::Boolean:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
                     >,
-                    "created_at" => #<ActiveRecord::Type::DateTime:0x01234567
+                    "created_at" => #<ActiveRecord::Type::DateTime:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
                     >,
-                            "id" => #<ActiveRecord::Type::Integer:0x01234567
+                            "id" => #<ActiveRecord::Type::Integer:placeholder_id
                         @range = -2147483648...2147483648,
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
                     >,
-                          "name" => #<ActiveRecord::ConnectionAdapters::SQLite3String:0x01234567
+                          "name" => #<ActiveRecord::ConnectionAdapters::SQLite3String:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
                     >,
-                          "rank" => #<ActiveRecord::Type::Integer:0x01234567
+                          "rank" => #<ActiveRecord::Type::Integer:placeholder_id
                         @range = -2147483648...2147483648,
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
@@ -756,7 +756,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                   "rank" => nil
         }
     >,
-    [1] #<User:0x01234567
+    [1] #<User:placeholder_id
         @_start_transaction_state = {},
         @aggregation_cache = {},
         @destroyed = false,
@@ -774,13 +774,13 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
         ],
         @transaction_state = nil,
         @txn = nil,
-        attr_accessor :attributes = #<ActiveRecord::AttributeSet:0x01234567
-            @attributes = #<ActiveRecord::LazyAttributeHash:0x01234567
+        attr_accessor :attributes = #<ActiveRecord::AttributeSet:placeholder_id
+            @attributes = #<ActiveRecord::LazyAttributeHash:placeholder_id
                 @additional_types = {},
                 @delegate_hash = {
-                         "admin" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                         "admin" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                         attr_reader :name = "admin",
-                        attr_reader :type = #<ActiveRecord::Type::Boolean:0x01234567
+                        attr_reader :type = #<ActiveRecord::Type::Boolean:placeholder_id
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
                             attr_reader :scale = nil
@@ -788,9 +788,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                         attr_reader :value = true,
                         attr_reader :value_before_type_cast = true
                     >,
-                    "created_at" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                    "created_at" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                         attr_reader :name = "created_at",
-                        attr_reader :type = #<ActiveRecord::Type::DateTime:0x01234567
+                        attr_reader :type = #<ActiveRecord::Type::DateTime:placeholder_id
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
                             attr_reader :scale = nil
@@ -798,9 +798,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                         attr_reader :value = 2003-05-26 14:15:00 UTC,
                         attr_reader :value_before_type_cast = "2003-05-26 14:15:00"
                     >,
-                            "id" => #<ActiveRecord::Attribute::FromDatabase:0x01234567
+                            "id" => #<ActiveRecord::Attribute::FromDatabase:placeholder_id
                         attr_reader :name = "id",
-                        attr_reader :type = #<ActiveRecord::Type::Integer:0x01234567
+                        attr_reader :type = #<ActiveRecord::Type::Integer:placeholder_id
                             @range = -2147483648...2147483648,
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
@@ -809,9 +809,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                         attr_reader :value = nil,
                         attr_reader :value_before_type_cast = nil
                     >,
-                          "name" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                          "name" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                         attr_reader :name = "name",
-                        attr_reader :type = #<ActiveRecord::ConnectionAdapters::SQLite3String:0x01234567
+                        attr_reader :type = #<ActiveRecord::ConnectionAdapters::SQLite3String:placeholder_id
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
                             attr_reader :scale = nil
@@ -819,9 +819,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                         attr_reader :value = "Laura",
                         attr_reader :value_before_type_cast = "Laura"
                     >,
-                          "rank" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                          "rank" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                         attr_reader :name = "rank",
-                        attr_reader :type = #<ActiveRecord::Type::Integer:0x01234567
+                        attr_reader :type = #<ActiveRecord::Type::Integer:placeholder_id
                             @range = -2147483648...2147483648,
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
@@ -833,28 +833,28 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 },
                 @materialized = false,
                 @types = {
-                         "admin" => #<ActiveRecord::Type::Boolean:0x01234567
+                         "admin" => #<ActiveRecord::Type::Boolean:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
                     >,
-                    "created_at" => #<ActiveRecord::Type::DateTime:0x01234567
+                    "created_at" => #<ActiveRecord::Type::DateTime:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
                     >,
-                            "id" => #<ActiveRecord::Type::Integer:0x01234567
+                            "id" => #<ActiveRecord::Type::Integer:placeholder_id
                         @range = -2147483648...2147483648,
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
                     >,
-                          "name" => #<ActiveRecord::ConnectionAdapters::SQLite3String:0x01234567
+                          "name" => #<ActiveRecord::ConnectionAdapters::SQLite3String:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
                     >,
-                          "rank" => #<ActiveRecord::Type::Integer:0x01234567
+                          "rank" => #<ActiveRecord::Type::Integer:placeholder_id
                         @range = -2147483648...2147483648,
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
@@ -884,7 +884,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
         else
           str = <<-EOS.strip
 [
-    [0] #<User:0x01234567
+    [0] #<User:placeholder_id
         @_start_transaction_state = {},
         @aggregation_cache = {},
         @destroyed = false,
@@ -902,14 +902,14 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
         ],
         @transaction_state = nil,
         @txn = nil,
-        attr_accessor :attributes = #<ActiveRecord::AttributeSet:0x01234567
-            attr_reader :attributes = #<ActiveRecord::LazyAttributeHash:0x01234567
+        attr_accessor :attributes = #<ActiveRecord::AttributeSet:placeholder_id
+            attr_reader :attributes = #<ActiveRecord::LazyAttributeHash:placeholder_id
                 @materialized = false,
                 attr_reader :additional_types = {},
                 attr_reader :delegate_hash = {
-                         "admin" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                         "admin" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                         attr_reader :name = "admin",
-                        attr_reader :type = #<ActiveRecord::Type::Boolean:0x01234567
+                        attr_reader :type = #<ActiveRecord::Type::Boolean:placeholder_id
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
                             attr_reader :scale = nil
@@ -917,9 +917,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                         attr_reader :value = false,
                         attr_reader :value_before_type_cast = false
                     >,
-                    "created_at" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                    "created_at" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                         attr_reader :name = "created_at",
-                        attr_reader :type = #<ActiveRecord::Type::DateTime:0x01234567
+                        attr_reader :type = #<ActiveRecord::Type::DateTime:placeholder_id
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
                             attr_reader :scale = nil
@@ -927,9 +927,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                         attr_reader :value = 1992-10-10 12:30:00 UTC,
                         attr_reader :value_before_type_cast = "1992-10-10 12:30:00"
                     >,
-                            "id" => #<ActiveRecord::Attribute::FromDatabase:0x01234567
+                            "id" => #<ActiveRecord::Attribute::FromDatabase:placeholder_id
                         attr_reader :name = "id",
-                        attr_reader :type = #<ActiveRecord::Type::Integer:0x01234567
+                        attr_reader :type = #<ActiveRecord::Type::Integer:placeholder_id
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
                             attr_reader :range = -2147483648...2147483648,
@@ -938,9 +938,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                         attr_reader :value = nil,
                         attr_reader :value_before_type_cast = nil
                     >,
-                          "name" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                          "name" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                         attr_reader :name = "name",
-                        attr_reader :type = #<ActiveRecord::ConnectionAdapters::SQLite3String:0x01234567
+                        attr_reader :type = #<ActiveRecord::ConnectionAdapters::SQLite3String:placeholder_id
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
                             attr_reader :scale = nil
@@ -948,9 +948,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                         attr_reader :value = "Diana",
                         attr_reader :value_before_type_cast = "Diana"
                     >,
-                          "rank" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                          "rank" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                         attr_reader :name = "rank",
-                        attr_reader :type = #<ActiveRecord::Type::Integer:0x01234567
+                        attr_reader :type = #<ActiveRecord::Type::Integer:placeholder_id
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
                             attr_reader :range = -2147483648...2147483648,
@@ -961,28 +961,28 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                     >
                 },
                 attr_reader :types = {
-                         "admin" => #<ActiveRecord::Type::Boolean:0x01234567
+                         "admin" => #<ActiveRecord::Type::Boolean:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
                     >,
-                    "created_at" => #<ActiveRecord::Type::DateTime:0x01234567
+                    "created_at" => #<ActiveRecord::Type::DateTime:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
                     >,
-                            "id" => #<ActiveRecord::Type::Integer:0x01234567
+                            "id" => #<ActiveRecord::Type::Integer:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :range = -2147483648...2147483648,
                         attr_reader :scale = nil
                     >,
-                          "name" => #<ActiveRecord::ConnectionAdapters::SQLite3String:0x01234567
+                          "name" => #<ActiveRecord::ConnectionAdapters::SQLite3String:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
                     >,
-                          "rank" => #<ActiveRecord::Type::Integer:0x01234567
+                          "rank" => #<ActiveRecord::Type::Integer:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :range = -2147483648...2147483648,
@@ -1007,7 +1007,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                   "rank" => nil
         }
     >,
-    [1] #<User:0x01234567
+    [1] #<User:placeholder_id
         @_start_transaction_state = {},
         @aggregation_cache = {},
         @destroyed = false,
@@ -1025,14 +1025,14 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
         ],
         @transaction_state = nil,
         @txn = nil,
-        attr_accessor :attributes = #<ActiveRecord::AttributeSet:0x01234567
-            attr_reader :attributes = #<ActiveRecord::LazyAttributeHash:0x01234567
+        attr_accessor :attributes = #<ActiveRecord::AttributeSet:placeholder_id
+            attr_reader :attributes = #<ActiveRecord::LazyAttributeHash:placeholder_id
                 @materialized = false,
                 attr_reader :additional_types = {},
                 attr_reader :delegate_hash = {
-                         "admin" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                         "admin" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                         attr_reader :name = "admin",
-                        attr_reader :type = #<ActiveRecord::Type::Boolean:0x01234567
+                        attr_reader :type = #<ActiveRecord::Type::Boolean:placeholder_id
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
                             attr_reader :scale = nil
@@ -1040,9 +1040,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                         attr_reader :value = true,
                         attr_reader :value_before_type_cast = true
                     >,
-                    "created_at" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                    "created_at" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                         attr_reader :name = "created_at",
-                        attr_reader :type = #<ActiveRecord::Type::DateTime:0x01234567
+                        attr_reader :type = #<ActiveRecord::Type::DateTime:placeholder_id
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
                             attr_reader :scale = nil
@@ -1050,9 +1050,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                         attr_reader :value = 2003-05-26 14:15:00 UTC,
                         attr_reader :value_before_type_cast = "2003-05-26 14:15:00"
                     >,
-                            "id" => #<ActiveRecord::Attribute::FromDatabase:0x01234567
+                            "id" => #<ActiveRecord::Attribute::FromDatabase:placeholder_id
                         attr_reader :name = "id",
-                        attr_reader :type = #<ActiveRecord::Type::Integer:0x01234567
+                        attr_reader :type = #<ActiveRecord::Type::Integer:placeholder_id
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
                             attr_reader :range = -2147483648...2147483648,
@@ -1061,9 +1061,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                         attr_reader :value = nil,
                         attr_reader :value_before_type_cast = nil
                     >,
-                          "name" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                          "name" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                         attr_reader :name = "name",
-                        attr_reader :type = #<ActiveRecord::ConnectionAdapters::SQLite3String:0x01234567
+                        attr_reader :type = #<ActiveRecord::ConnectionAdapters::SQLite3String:placeholder_id
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
                             attr_reader :scale = nil
@@ -1071,9 +1071,9 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                         attr_reader :value = "Laura",
                         attr_reader :value_before_type_cast = "Laura"
                     >,
-                          "rank" => #<ActiveRecord::Attribute::FromUser:0x01234567
+                          "rank" => #<ActiveRecord::Attribute::FromUser:placeholder_id
                         attr_reader :name = "rank",
-                        attr_reader :type = #<ActiveRecord::Type::Integer:0x01234567
+                        attr_reader :type = #<ActiveRecord::Type::Integer:placeholder_id
                             attr_reader :limit = nil,
                             attr_reader :precision = nil,
                             attr_reader :range = -2147483648...2147483648,
@@ -1084,28 +1084,28 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                     >
                 },
                 attr_reader :types = {
-                         "admin" => #<ActiveRecord::Type::Boolean:0x01234567
+                         "admin" => #<ActiveRecord::Type::Boolean:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
                     >,
-                    "created_at" => #<ActiveRecord::Type::DateTime:0x01234567
+                    "created_at" => #<ActiveRecord::Type::DateTime:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
                     >,
-                            "id" => #<ActiveRecord::Type::Integer:0x01234567
+                            "id" => #<ActiveRecord::Type::Integer:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :range = -2147483648...2147483648,
                         attr_reader :scale = nil
                     >,
-                          "name" => #<ActiveRecord::ConnectionAdapters::SQLite3String:0x01234567
+                          "name" => #<ActiveRecord::ConnectionAdapters::SQLite3String:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :scale = nil
                     >,
-                          "rank" => #<ActiveRecord::Type::Integer:0x01234567
+                          "rank" => #<ActiveRecord::Type::Integer:placeholder_id
                         attr_reader :limit = nil,
                         attr_reader :precision = nil,
                         attr_reader :range = -2147483648...2147483648,
@@ -1136,12 +1136,12 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
       elsif activerecord_4_1?
         str = <<-EOS.strip
 [
-    [0] #<User:0x01234567
+    [0] #<User:placeholder_id
         @_start_transaction_state = {},
         @aggregation_cache = {},
         @attributes_cache = {},
         @column_types = {
-                 "admin" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                 "admin" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = false,
                 attr_reader :default = nil,
@@ -1154,7 +1154,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 attr_reader :sql_type = "boolean",
                 attr_reader :type = :boolean
             >,
-            "created_at" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+            "created_at" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = false,
                 attr_reader :default = nil,
@@ -1167,7 +1167,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 attr_reader :sql_type = "datetime",
                 attr_reader :type = :datetime
             >,
-                    "id" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                    "id" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = true,
                 attr_reader :default = nil,
@@ -1180,7 +1180,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 attr_reader :sql_type = "INTEGER",
                 attr_reader :type = :integer
             >,
-                  "name" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                  "name" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = false,
                 attr_reader :default = nil,
@@ -1193,7 +1193,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 attr_reader :sql_type = "varchar(255)",
                 attr_reader :type = :string
             >,
-                  "rank" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                  "rank" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = false,
                 attr_reader :default = nil,
@@ -1233,12 +1233,12 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                   "rank" => nil
         }
     >,
-    [1] #<User:0x01234567
+    [1] #<User:placeholder_id
         @_start_transaction_state = {},
         @aggregation_cache = {},
         @attributes_cache = {},
         @column_types = {
-                 "admin" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                 "admin" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = false,
                 attr_reader :default = nil,
@@ -1251,7 +1251,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 attr_reader :sql_type = "boolean",
                 attr_reader :type = :boolean
             >,
-            "created_at" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+            "created_at" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = false,
                 attr_reader :default = nil,
@@ -1264,7 +1264,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 attr_reader :sql_type = "datetime",
                 attr_reader :type = :datetime
             >,
-                    "id" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                    "id" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = true,
                 attr_reader :default = nil,
@@ -1277,7 +1277,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 attr_reader :sql_type = "INTEGER",
                 attr_reader :type = :integer
             >,
-                  "name" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                  "name" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = false,
                 attr_reader :default = nil,
@@ -1290,7 +1290,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 attr_reader :sql_type = "varchar(255)",
                 attr_reader :type = :string
             >,
-                  "rank" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                  "rank" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = false,
                 attr_reader :default = nil,
@@ -1335,12 +1335,12 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
       elsif activerecord_4_0?
         str = <<-EOS.strip
 [
-    [0] #<User:0x01234567
+    [0] #<User:placeholder_id
         @_start_transaction_state = {},
         @aggregation_cache = {},
         @attributes_cache = {},
         @column_types = {
-                 "admin" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                 "admin" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = false,
                 attr_reader :default = nil,
@@ -1353,7 +1353,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 attr_reader :sql_type = "boolean",
                 attr_reader :type = :boolean
             >,
-            "created_at" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+            "created_at" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = false,
                 attr_reader :default = nil,
@@ -1366,7 +1366,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 attr_reader :sql_type = "datetime",
                 attr_reader :type = :datetime
             >,
-                    "id" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                    "id" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = true,
                 attr_reader :default = nil,
@@ -1379,7 +1379,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 attr_reader :sql_type = "INTEGER",
                 attr_reader :type = :integer
             >,
-                  "name" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                  "name" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = false,
                 attr_reader :default = nil,
@@ -1392,7 +1392,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 attr_reader :sql_type = "varchar(255)",
                 attr_reader :type = :string
             >,
-                  "rank" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                  "rank" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = false,
                 attr_reader :default = nil,
@@ -1433,12 +1433,12 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                   "rank" => nil
         }
     >,
-    [1] #<User:0x01234567
+    [1] #<User:placeholder_id
         @_start_transaction_state = {},
         @aggregation_cache = {},
         @attributes_cache = {},
         @column_types = {
-                 "admin" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                 "admin" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = false,
                 attr_reader :default = nil,
@@ -1451,7 +1451,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 attr_reader :sql_type = "boolean",
                 attr_reader :type = :boolean
             >,
-            "created_at" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+            "created_at" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = false,
                 attr_reader :default = nil,
@@ -1464,7 +1464,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 attr_reader :sql_type = "datetime",
                 attr_reader :type = :datetime
             >,
-                    "id" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                    "id" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = true,
                 attr_reader :default = nil,
@@ -1477,7 +1477,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 attr_reader :sql_type = "INTEGER",
                 attr_reader :type = :integer
             >,
-                  "name" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                  "name" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = false,
                 attr_reader :default = nil,
@@ -1490,7 +1490,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                 attr_reader :sql_type = "varchar(255)",
                 attr_reader :type = :string
             >,
-                  "rank" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:0x01234567
+                  "rank" => #<ActiveRecord::ConnectionAdapters::SQLite3Column:placeholder_id
                 attr_accessor :coder = nil,
                 attr_accessor :primary = false,
                 attr_reader :default = nil,
@@ -1537,7 +1537,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
         if RUBY_VERSION > '1.9.3'
           str = <<-EOS.strip
 [
-    [0] #<User:0x01234567
+    [0] #<User:placeholder_id
         @aggregation_cache = {},
         @attributes_cache = {},
         @destroyed = false,
@@ -1561,7 +1561,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
                   "rank" => nil
         }
     >,
-    [1] #<User:0x01234567
+    [1] #<User:placeholder_id
         @aggregation_cache = {},
         @attributes_cache = {},
         @destroyed = false,
@@ -1590,7 +1590,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
         else
           str = <<-EOS.strip
 [
-    [0] #<User:0x01234567
+    [0] #<User:placeholder_id
         @aggregation_cache = {},
         @attributes_cache = {},
         @destroyed = false,
@@ -1614,7 +1614,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
         },
         attr_reader :mass_assignment_options = nil
     >,
-    [1] #<User:0x01234567
+    [1] #<User:placeholder_id
         @aggregation_cache = {},
         @attributes_cache = {},
         @destroyed = false,
@@ -1644,7 +1644,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
       end
       str.sub!('?', '1992-10-10 12:30:00')
       str.sub!('?', '2003-05-26 14:15:00')
-      expect(out.gsub(/0x([a-f\d]+)/, "0x01234567")).to eq(str)
+      expect(out).to be_similar_to(str)
     end
   end
 
@@ -1655,7 +1655,7 @@ RSpec.describe "AwesomePrint/ActiveRecord", skip: ->{ !ExtVerifier.has_rails? }.
     end
 
     it "should print the class" do
-      expect(@ap.send(:awesome, User)).to eq <<-EOS.strip
+      expect(@ap.awesome(User)).to eq <<-EOS.strip
 class User < ActiveRecord::Base {
             :id => :integer,
           :name => :string,
@@ -1667,7 +1667,7 @@ class User < ActiveRecord::Base {
     end
 
     it "should print the class for non-direct subclasses of ActiveRecord::Base" do
-      out = @ap.send(:awesome, SubUser)
+      out = @ap.awesome(SubUser)
       expect(out).to eq <<-EOS.strip
 class SubUser < User {
             :id => :integer,
@@ -1680,7 +1680,7 @@ class SubUser < User {
     end
 
     it "should print ActiveRecord::Base objects (ex. ancestors)" do
-      expect { @ap.send(:awesome, User.ancestors) }.not_to raise_error
+      expect { @ap.awesome(User.ancestors) }.not_to raise_error
     end
   end
 
@@ -1692,7 +1692,7 @@ class SubUser < User {
 
     it "should format class methods properly" do
       # spec 1
-      out = @ap.send(:awesome, User.methods.grep(/first/))
+      out = @ap.awesome(User.methods.grep(/first/))
 
       if ActiveRecord::VERSION::STRING >= "3.2"
         if RUBY_VERSION >= "1.9"
@@ -1705,11 +1705,11 @@ class SubUser < User {
       end
 
       # spec 2
-      out = @ap.send(:awesome, User.methods.grep(/primary_key/))
+      out = @ap.awesome(User.methods.grep(/primary_key/))
       expect(out).to match(/\sprimary_key\(.*?\)\s+Class \(ActiveRecord::AttributeMethods::PrimaryKey::ClassMethods\)/)
 
       # spec 3
-      out = @ap.send(:awesome, User.methods.grep(/validate/))
+      out = @ap.awesome(User.methods.grep(/validate/))
 
       if ActiveRecord::VERSION::MAJOR < 3
         expect(out).to match(/\svalidate\(\*arg.*?\)\s+User \(ActiveRecord::Base\)/)
diff --git a/spec/ext/mongo_mapper_spec.rb b/spec/ext/mongo_mapper_spec.rb
index 9c0872a..be0e430 100644
--- a/spec/ext/mongo_mapper_spec.rb
+++ b/spec/ext/mongo_mapper_spec.rb
@@ -36,9 +36,9 @@ RSpec.describe "AwesomePrint/MongoMapper", skip: ->{ !ExtVerifier.has_mongo_mapp
 
       if MongoMapper::Version >= "0.13"
         str = <<-EOS.strip
-#<MongoUser:0x01234567
+#<MongoUser:placeholder_id
     @__mm_default_keys = [
-        [0] #<MongoMapper::Plugins::Keys::Key:0x01234567
+        [0] #<MongoMapper::Plugins::Keys::Key:placeholder_id
             @dynamic = false,
             @embeddable = false,
             @has_default = true,
@@ -55,7 +55,7 @@ RSpec.describe "AwesomePrint/MongoMapper", skip: ->{ !ExtVerifier.has_mongo_mapp
         >
     ],
     @__mm_keys = {
-               "_id" => #<MongoMapper::Plugins::Keys::Key:0x01234567
+               "_id" => #<MongoMapper::Plugins::Keys::Key:placeholder_id
             @dynamic = false,
             @embeddable = false,
             @has_default = true,
@@ -70,7 +70,7 @@ RSpec.describe "AwesomePrint/MongoMapper", skip: ->{ !ExtVerifier.has_mongo_mapp
             },
             attr_accessor :type = ObjectId < Object
         >,
-        "first_name" => #<MongoMapper::Plugins::Keys::Key:0x01234567
+        "first_name" => #<MongoMapper::Plugins::Keys::Key:placeholder_id
             @dynamic = false,
             @embeddable = false,
             @has_default = false,
@@ -82,7 +82,7 @@ RSpec.describe "AwesomePrint/MongoMapper", skip: ->{ !ExtVerifier.has_mongo_mapp
             attr_accessor :options = {},
             attr_accessor :type = String < Object
         >,
-         "last_name" => #<MongoMapper::Plugins::Keys::Key:0x01234567
+         "last_name" => #<MongoMapper::Plugins::Keys::Key:placeholder_id
             @dynamic = false,
             @embeddable = false,
             @has_default = false,
@@ -113,7 +113,7 @@ RSpec.describe "AwesomePrint/MongoMapper", skip: ->{ !ExtVerifier.has_mongo_mapp
         EOS
       else
         str = <<-EOS.strip
-#<MongoUser:0x01234567
+#<MongoUser:placeholder_id
     @_new = true,
     attr_accessor :first_name = "Al",
     attr_accessor :last_name = "Capone",
@@ -126,8 +126,7 @@ RSpec.describe "AwesomePrint/MongoMapper", skip: ->{ !ExtVerifier.has_mongo_mapp
 >
         EOS
       end
-      out.gsub!(/0x([a-f\d]+)/, "0x01234567")
-      expect(out).to eq(str)
+      expect(out).to be_similar_to(str)
     end
 
     it "should print the class" do
@@ -193,14 +192,12 @@ class Parent < Object {
         parent = Parent.new(:name => 'test')
         out = @ap.send(:awesome, parent)
         str = <<-EOS.strip
-#<Parent:0x01234567> {
-     "_id" => BSON::ObjectId('4d9183739a546f6806000001'),
+#<Parent:placeholder_id> {
+     "_id" => placeholder_bison_id,
     "name" => "test"
 }
         EOS
-        out.gsub!(/'([\w]+){23}'/, "'4d9183739a546f6806000001'")
-        out.gsub!(/0x([a-f\d]+)/, "0x01234567")
-        expect(out).to eq(str)
+        expect(out).to be_similar_to(str)
       end
     end
 
@@ -224,16 +221,14 @@ class Parent < Object {
         parent = Parent.new(:name => 'test')
         out = @ap.send(:awesome, parent)
         str = <<-EOS.strip
-#<Parent:0x01234567> {
-        "_id" => BSON::ObjectId('4d9183739a546f6806000001'),
+#<Parent:placeholder_id> {
+        "_id" => placeholder_bison_id,
        "name" => "test",
       "child" => embeds one Child,
     "sibling" => one Sibling
 }
         EOS
-        out.gsub!(/'([\w]+){23}'/, "'4d9183739a546f6806000001'")
-        out.gsub!(/0x([a-f\d]+)/, "0x01234567")
-        expect(out).to eq(str)
+        expect(out).to be_similar_to(str)
       end
     end
 
@@ -251,19 +246,17 @@ class Parent < Object {
         parent = Parent.new(:name => 'test', :child => Child.new(:data => 5))
         out = @ap.send(:awesome, parent)
         str = <<-EOS.strip
-#<Parent:0x01234567> {
-        "_id" => BSON::ObjectId('4d9183739a546f6806000001'),
+#<Parent:placeholder_id> {
+        "_id" => placeholder_bison_id,
        "name" => "test",
-      "child" => embedded #<Child:0x01234567> {
-         "_id" => BSON::ObjectId('4d9183739a546f6806000001'),
+      "child" => embedded #<Child:placeholder_id> {
+         "_id" => placeholder_bison_id,
         "data" => 5
     },
     "sibling" => one Sibling
 }
         EOS
-        out.gsub!(/'([\w]+){23}'/, "'4d9183739a546f6806000001'")
-        out.gsub!(/0x([a-f\d]+)/, "0x01234567")
-        expect(out).to eq(str)
+        expect(out).to be_similar_to(str)
       end
     end
   end
diff --git a/spec/ext/mongoid_spec.rb b/spec/ext/mongoid_spec.rb
index b241b1b..6591a43 100644
--- a/spec/ext/mongoid_spec.rb
+++ b/spec/ext/mongoid_spec.rb
@@ -29,14 +29,13 @@ RSpec.describe "AwesomePrint/Mongoid", skip: ->{ !ExtVerifier.has_mongoid? }.cal
 
     object_id = user.id.inspect
     str = <<-EOS.strip
-#<MongoUser:0x01234567> {
+#<MongoUser:placeholder_id> {
            :_id => #{object_id},
     :first_name => "Al",
      :last_name => "Capone"
 }
     EOS
-    out.gsub!(/0x([a-f\d]+)/, "0x01234567")
-    expect(out).to eq(str)
+    expect(out).to be_similar_to(str)
   end
 
   it "should print the class" do
diff --git a/spec/ext/ripple_spec.rb b/spec/ext/ripple_spec.rb
index 3f94aec..9c35372 100644
--- a/spec/ext/ripple_spec.rb
+++ b/spec/ext/ripple_spec.rb
@@ -28,8 +28,8 @@ RSpec.describe 'AwesomePrint/Ripple', skip: ->{ !ExtVerifier.has_ripple? }.call
     user = RippleUser.new :_id => "12345", :first_name => "Al", :last_name => "Capone"
     out = @ap.send :awesome, user
 
-    expect(out.gsub(/0x([a-f\d]+)/, "0x01234567")).to eq <<-EOS.strip
-#<RippleUser:0x01234567> {
+    expect(out).to be_similar_to <<-EOS.strip
+#<RippleUser:placeholder_id> {
            :_id => "12345",
     :first_name => "Al",
      :last_name => "Capone"
diff --git a/spec/objects_spec.rb b/spec/objects_spec.rb
index cdbfa40..aa3f476 100644
--- a/spec/objects_spec.rb
+++ b/spec/objects_spec.rb
@@ -24,13 +24,13 @@ RSpec.describe "Objects" do
       hello = Hello.new
       out = hello.ai(:plain => true, :raw => true)
       str = <<-EOS.strip
-#<Hello:0x01234567
+#<Hello:placeholder_id
     attr_accessor :dabra = 3,
     attr_reader :abra = 1,
     attr_writer :ca = 2
 >
 EOS
-      expect(out.gsub(/0x([a-f\d]+)/, "0x01234567")).to eq(str)
+      expect(out).to be_similar_to(str)
       expect(hello.ai(:plain => true, :raw => false)).to eq(hello.inspect)
     end
 
@@ -44,13 +44,13 @@ EOS
       hello = Hello.new
       out = hello.ai(:plain => true, :raw => true)
       str = <<-EOS.strip
-#<Hello:0x01234567
+#<Hello:placeholder_id
     @abra = 1,
     @ca = 2,
     @dabra = 3
 >
 EOS
-      expect(out.gsub(/0x([a-f\d]+)/, "0x01234567")).to eq(str)
+      expect(out).to be_similar_to(str)
       expect(hello.ai(:plain => true, :raw => false)).to eq(hello.inspect)
     end
 
@@ -69,7 +69,7 @@ EOS
       hello = Hello.new
       out = hello.ai(:plain => true, :raw => true)
       str = <<-EOS.strip
-#<Hello:0x01234567
+#<Hello:placeholder_id
     @doo = 1,
     @dooby = 2,
     @scooby = 3,
@@ -78,7 +78,7 @@ EOS
     attr_writer :ca = 2
 >
 EOS
-      expect(out.gsub(/0x([a-f\d]+)/, "0x01234567")).to eq(str)
+      expect(out).to be_similar_to(str)
       expect(hello.ai(:plain => true, :raw => false)).to eq(hello.inspect)
     end
 
@@ -96,13 +96,13 @@ EOS
       hello = Hello.new
       out = hello.ai(:raw => true)
       str = <<-EOS.strip
-#<Hello:0x01234567
+#<Hello:placeholder_id
     \e[0;36m@dabra\e[0m\e[0;37m = \e[0m\e[1;34m3\e[0m,
     \e[1;36mattr_reader\e[0m \e[0;35m:abra\e[0m\e[0;37m = \e[0m\e[1;34m1\e[0m,
     \e[1;36mattr_writer\e[0m \e[0;35m:ca\e[0m\e[0;37m = \e[0m\e[1;34m2\e[0m
 >
 EOS
-      expect(out.gsub(/0x([a-f\d]+)/, "0x01234567")).to eq(str)
+      expect(out).to be_similar_to(str)
       expect(hello.ai(:plain => true, :raw => false)).to eq(hello.inspect)
     end
 
@@ -120,9 +120,9 @@ EOS
       hello = Hello.new
       out = hello.ai(:multiline => false, :plain => true, :raw => true)
       str = <<-EOS.strip
-#<Hello:0x01234567 @dabra = 3, attr_reader :abra = 1, attr_writer :ca = 2>
+#<Hello:placeholder_id @dabra = 3, attr_reader :abra = 1, attr_writer :ca = 2>
 EOS
-      expect(out.gsub(/0x([a-f\d]+)/, "0x01234567")).to eq(str)
+      expect(out).to be_similar_to(str)
       expect(hello.ai(:plain => true, :raw => false)).to eq(hello.inspect)
     end
   end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 4d43a29..4de361d 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -47,6 +47,26 @@ RSpec.configure do |config|
   end
 end
 
+# This matcher handles the normalization of objects to replace non deterministic
+# parts (such as object IDs) with simple placeholder strings before doing a
+# comparison with a given string. It's important that this method only matches
+# a string which strictly conforms to the expected object ID format.
+RSpec::Matchers.define :be_similar_to do |expected|
+  match do |actual|
+    @actual = normalize_object_strings(actual)
+    values_match? expected, @actual
+  end
+
+  diffable
+end
+
+# Override the Object IDs with a placeholder so that we are only checking
+# that an ID is present and not that it matches a certain value. This is
+# necessary as the Object IDs are not deterministic.
+def normalize_object_strings(str)
+  str.gsub(/#<(.*?):0x[a-f\d]+/, '#<\1:placeholder_id')
+end
+
 def stub_dotfile!
   dotfile = File.join(ENV["HOME"], ".aprc")
   expect(File).to receive(:readable?).at_least(:once).with(dotfile).and_return(false)