Fix support for Array#dig

.rubocop_todo.yml

@@ -1,6 +1,6 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2015-10-25 15:28:03 -0400 using RuboCop version 0.34.2.
+# on 2016-06-01 14:51:33 -0700 using RuboCop version 0.34.2.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
@@ -18,23 +18,23 @@ Metrics/AbcSize:
 # Offense count: 2
 # Configuration parameters: CountComments.
 Metrics/ClassLength:
-  Max: 176
+  Max: 179
 
 # Offense count: 6
 Metrics/CyclomaticComplexity:
   Max: 11
 
-# Offense count: 218
+# Offense count: 231
 # Configuration parameters: AllowURI, URISchemes.
 Metrics/LineLength:
   Max: 170
 
-# Offense count: 17
+# Offense count: 16
 # Configuration parameters: CountComments.
 Metrics/MethodLength:
   Max: 28
 
-# Offense count: 6
+# Offense count: 5
 Metrics/PerceivedComplexity:
   Max: 10
 
@@ -43,7 +43,7 @@ Style/CaseEquality:
   Exclude:
     - 'lib/hashie/hash.rb'
 
-# Offense count: 27
+# Offense count: 32
 # Configuration parameters: Exclude.
 Style/Documentation:
   Enabled: false
@@ -57,7 +57,7 @@ Style/DoubleNegation:
     - 'lib/hashie/mash.rb'
     - 'spec/hashie/extensions/coercion_spec.rb'
 
-# Offense count: 3
+# Offense count: 5
 # Cop supports --auto-correct.
 # Configuration parameters: EnforcedStyle, SupportedStyles, UseHashRocketsWithSymbolValues.
 Style/HashSyntax:

CHANGELOG.md

@@ -28,7 +28,7 @@ scheme are considered to be bugs.
 
 ### Fixed
 
-* Nothing yet.
+* [#358](https://github.com/intridea/hashie/pull/358): Fix support for Array#dig - [@modosc](https://github.com/modosc/).
 
 ### Security
 

lib/hashie.rb

@@ -7,6 +7,7 @@ module Hashie
   autoload :Mash,               'hashie/mash'
   autoload :Trash,              'hashie/trash'
   autoload :Rash,               'hashie/rash'
+  autoload :Array,              'hashie/array'
 
   module Extensions
     autoload :Coercion,          'hashie/extensions/coercion'
@@ -27,6 +28,7 @@ module Hashie
     autoload :KeyConversion,     'hashie/extensions/key_conversion'
     autoload :MethodAccessWithOverride, 'hashie/extensions/method_access'
     autoload :StrictKeyAccess, 'hashie/extensions/strict_key_access'
+    autoload :RubyVersionCheck, 'hashie/extensions/ruby_version_check'
 
     module Parsers
       autoload :YamlErbParser, 'hashie/extensions/parsers/yaml_erb_parser'
@@ -41,6 +43,10 @@ module Hashie
     module Mash
       autoload :SafeAssignment, 'hashie/extensions/mash/safe_assignment'
     end
+
+    module Array
+      autoload :PrettyInspect, 'hashie/extensions/array/pretty_inspect'
+    end
   end
 
   class << self

lib/hashie/array.rb

@@ -0,0 +1,11 @@
+module Hashie
+  class Array < ::Array
+    include Hashie::Extensions::Array::PrettyInspect
+    include Hashie::Extensions::RubyVersionCheck
+    with_minimum_ruby('2.3.0') do
+      def dig(*indexes)
+        super(*indexes.map { |idx| Integer(idx) })
+      end
+    end
+  end
+end

lib/hashie/extensions/array/pretty_inspect.rb

@@ -0,0 +1,19 @@
+module Hashie
+  module Extensions
+    module Array
+      module PrettyInspect
+        def self.included(base)
+          base.send :alias_method, :array_inspect, :inspect
+          base.send :alias_method, :inspect, :hashie_inspect
+        end
+
+        def hashie_inspect
+          ret = "#<#{self.class} ["
+          ret << to_a.map(&:inspect).join(', ')
+          ret << ']>'
+          ret
+        end
+      end
+    end
+  end
+end

lib/hashie/extensions/ruby_version_check.rb

@@ -0,0 +1,15 @@
+module Hashie
+  module Extensions
+    module RubyVersionCheck
+      def self.included(base)
+        base.extend ClassMethods
+      end
+
+      module ClassMethods
+        def with_minimum_ruby(version)
+          yield if Gem::Version.new(RUBY_VERSION) >= Gem::Version.new(version)
+        end
+      end
+    end
+  end
+end

lib/hashie/mash.rb

@@ -1,4 +1,5 @@
 require 'hashie/hash'
+require 'hashie/array'
 
 module Hashie
   # Mash allows you to create pseudo-objects that have method-like
@@ -56,6 +57,7 @@ module Hashie
   #
   class Mash < Hash
     include Hashie::Extensions::PrettyInspect
+    include Hashie::Extensions::RubyVersionCheck
 
     ALLOWED_SUFFIXES = %w(? ! = _)
 
@@ -250,7 +252,7 @@ module Hashie
       self.class.new(other_hash).merge(self)
     end
 
-    if RUBY_VERSION >= '2.3.0'
+    with_minimum_ruby('2.3.0') do
       def dig(*keys)
         super(*keys.map { |key| convert_key(key) })
       end
@@ -287,6 +289,8 @@ module Hashie
         self.class.new(val)
       when Array
         val.map { |e| convert_value(e) }
+      when ::Array
+        Array.new(val.map { |e| convert_value(e) })
       else
         val
       end

spec/hashie/array_spec.rb

@@ -0,0 +1,17 @@
+require 'spec_helper'
+
+describe Array do
+  with_minimum_ruby('2.3.0') do
+    describe '#dig' do
+      let(:array) { Hashie::Array.new([:a, :b, :c]) }
+
+      it 'works with a string index' do
+        expect(array.dig('0')).to eq(:a)
+      end
+
+      it 'works with a numeric index' do
+        expect(array.dig(1)).to eq(:b)
+      end
+    end
+  end
+end

spec/hashie/mash_spec.rb

@@ -687,14 +687,21 @@ describe Hashie::Mash do
     end
   end
 
-  if RUBY_VERSION >= '2.3.0'
+  with_minimum_ruby('2.3.0') do
     describe '#dig' do
       subject { described_class.new(a: { b: 1 }) }
-
       it 'accepts both string and symbol as key' do
         expect(subject.dig(:a, :b)).to eq(1)
         expect(subject.dig('a', 'b')).to eq(1)
       end
+
+      context 'with numeric key' do
+        subject { described_class.new('1' => { b: 1 }) }
+        it 'accepts a numeric value as key' do
+          expect(subject.dig(1, :b)).to eq(1)
+          expect(subject.dig('1', :b)).to eq(1)
+        end
+      end
     end
   end
 end

spec/spec_helper.rb

@@ -8,8 +8,10 @@ require 'pry'
 require 'rspec'
 require 'hashie'
 require 'rspec/pending_for'
+require './spec/support/ruby_version_check'
 
 RSpec.configure do |config|
+  config.extend RubyVersionCheck
   config.expect_with :rspec do |expect|
     expect.syntax = :expect
   end

spec/support/ruby_version_check.rb

@@ -0,0 +1,5 @@
+module RubyVersionCheck
+  def with_minimum_ruby(version)
+    yield if Gem::Version.new(RUBY_VERSION) >= Gem::Version.new(version)
+  end
+end