diff --git a/spec/mongoid/adapters/mongoid/base_spec.rb b/spec/mongoid/adapters/mongoid/base_spec.rb
new file mode 100644
index 0000000..5d97bce
--- /dev/null
+++ b/spec/mongoid/adapters/mongoid/base_spec.rb
@@ -0,0 +1,270 @@
+require 'mongoid_spec_helper'
+
+module Ransack
+  module Adapters
+    module Mongoid
+      describe Base do
+
+        subject { Person }
+
+        it { should respond_to :ransack }
+        it { should respond_to :search }
+
+        describe '#search' do
+          subject { Person.search }
+
+          it { should be_a Search }
+          it 'has a Mongoid::Criteria as its object' do
+            expect(subject.object).to be_an ::Mongoid::Criteria
+          end
+
+          context 'with scopes' do
+            before do
+              Person.stub :ransackable_scopes => [:active, :over_age]
+            end
+
+            it "applies true scopes" do
+              search =  Person.search('active' => true)
+              expect(search.result.selector).to eq({ 'active' => 1 })
+            end
+
+            it "ignores unlisted scopes" do
+              search =  Person.search('restricted' => true)
+              expect(search.result.selector).to_not eq({ 'restricted' => 1})
+            end
+
+            it "ignores false scopes" do
+              search = Person.search('active' => false)
+              expect(search.result.selector).to_not eq({ 'active' => 1 })
+            end
+
+            it "passes values to scopes" do
+              search = Person.search('over_age' => 18)
+              expect(search.result.selector).to eq({ 'age' => { '$gt' => 18 } })
+            end
+
+            it "chains scopes" do
+              search = Person.search('over_age' => 18, 'active' => true)
+              expect(search.result.selector).to eq({ 'age' => { '$gt' => 18 }, 'active' => 1 })
+            end
+          end
+        end
+
+        describe '#ransacker' do
+          # For infix tests
+          def self.sane_adapter?
+            case ::Mongoid::Document.connection.adapter_name
+            when "SQLite3", "PostgreSQL"
+              true
+            else
+              false
+            end
+          end
+          # # in schema.rb, class Person:
+          # ransacker :reversed_name, formatter: proc { |v| v.reverse } do |parent|
+          #   parent.table[:name]
+          # end
+
+          # ransacker :doubled_name do |parent|
+          #   Arel::Nodes::InfixOperation.new(
+          #     '||', parent.table[:name], parent.table[:name]
+          #   )
+          # end
+
+          it 'creates ransack attributes' do
+            s = Person.search(:reversed_name_eq => 'htimS cirA')
+            expect(s.result.size).to eq(Person.where(name: 'Aric Smith').count)
+
+            expect(s.result.first).to eq Person.where(name: 'Aric Smith').first
+          end
+
+          context 'with joins' do
+            before { pending 'not implemented for mongoid' }
+
+            it 'can be accessed through associations' do
+              s = Person.search(:children_reversed_name_eq => 'htimS cirA')
+              expect(s.result.to_sql).to match(
+                /#{quote_table_name("children_people")}.#{
+                   quote_column_name("name")} = 'Aric Smith'/
+              )
+            end
+
+            it "should keep proper key value pairs in the params hash" do
+              s = Person.search(:children_reversed_name_eq => 'Testing')
+              expect(s.result.to_sql).to match /LEFT OUTER JOIN/
+            end
+
+          end
+
+          it 'allows an "attribute" to be an InfixOperation' do
+            s = Person.search(:doubled_name_eq => 'Aric SmithAric Smith')
+            expect(s.result.first).to eq Person.where(name: 'Aric Smith').first
+          end if defined?(Arel::Nodes::InfixOperation) && sane_adapter?
+
+          it "doesn't break #count if using InfixOperations" do
+            s = Person.search(:doubled_name_eq => 'Aric SmithAric Smith')
+            expect(s.result.count).to eq 1
+          end if defined?(Arel::Nodes::InfixOperation) && sane_adapter?
+
+          it "should remove empty key value pairs from the params hash" do
+            s = Person.search(:reversed_name_eq => '')
+            expect(s.result.selector).to eq({})
+          end
+
+          it "should function correctly when nil is passed in" do
+            s = Person.search(nil)
+          end
+
+          it "should function correctly when a blank string is passed in" do
+            s = Person.search('')
+          end
+
+          it "should function correctly when using fields with dots in them" do
+            s = Person.search(:email_cont => "example.com")
+            expect(s.result.exists?).to be true
+
+            s = Person.search(:email_cont => "example.co.")
+            expect(s.result.exists?).not_to be true
+          end
+
+          it "should function correctly when using fields with % in them" do
+            Person.create!(:name => "110%-er")
+            s = Person.search(:name_cont => "10%")
+            expect(s.result.exists?).to be true
+          end
+
+          it "should function correctly when using fields with backslashes in them" do
+            Person.create!(:name => "\\WINNER\\")
+            s = Person.search(:name_cont => "\\WINNER\\")
+            expect(s.result.exists?).to be true
+          end
+
+          it 'allows sort by "only_sort" field' do
+            pending "it doesn't work :("
+            s = Person.search(
+              "s" => { "0" => { "dir" => "desc", "name" => "only_sort" } }
+            )
+            expect(s.result.to_sql).to match(
+              /ORDER BY #{quote_table_name("people")}.#{
+                quote_column_name("only_sort")} ASC/
+            )
+          end
+
+          it "doesn't sort by 'only_search' field" do
+            pending "it doesn't work :("
+            s = Person.search(
+              "s" => { "0" => { "dir" => "asc", "name" => "only_search" } }
+            )
+            expect(s.result.to_sql).not_to match(
+              /ORDER BY #{quote_table_name("people")}.#{
+                quote_column_name("only_search")} ASC/
+            )
+          end
+
+          it 'allows search by "only_search" field' do
+            s = Person.search(:only_search_eq => 'htimS cirA')
+            expect(s.result.selector).to eq({'only_search' => 'htimS cirA'})
+          end
+
+          it "can't be searched by 'only_sort'" do
+            s = Person.search(:only_sort_eq => 'htimS cirA')
+            expect(s.result.selector).not_to eq({'only_sort' => 'htimS cirA'})
+          end
+
+          it 'allows sort by "only_admin" field, if auth_object: :admin' do
+            s = Person.search(
+              { "s" => { "0" => { "dir" => "asc", "name" => "only_admin" } } },
+              { auth_object: :admin }
+            )
+            expect(s.result.options).to eq({ sort: { '_id' => -1, 'only_admin' => 1 } })
+          end
+
+          it "doesn't sort by 'only_admin' field, if auth_object: nil" do
+            s = Person.search(
+              "s" => { "0" => { "dir" => "asc", "name" => "only_admin" } }
+            )
+            expect(s.result.options).to eq({ sort: {'_id' => -1}})
+          end
+
+          it 'allows search by "only_admin" field, if auth_object: :admin' do
+            s = Person.search(
+              { :only_admin_eq => 'htimS cirA' },
+              { :auth_object => :admin }
+            )
+            expect(s.result.selector).to eq({ 'only_admin' => 'htimS cirA' })
+          end
+
+          it "can't be searched by 'only_admin', if auth_object: nil" do
+            s = Person.search(:only_admin_eq => 'htimS cirA')
+            expect(s.result.selector).to eq({})
+          end
+        end
+
+        describe '#ransackable_attributes' do
+          context 'when auth_object is nil' do
+            subject { Person.ransackable_attributes }
+
+            it { should include 'name' }
+            it { should include 'reversed_name' }
+            it { should include 'doubled_name' }
+            it { should include 'only_search' }
+            it { should_not include 'only_sort' }
+            it { should_not include 'only_admin' }
+          end
+
+          context 'with auth_object :admin' do
+            subject { Person.ransackable_attributes(:admin) }
+
+            it { should include 'name' }
+            it { should include 'reversed_name' }
+            it { should include 'doubled_name' }
+            it { should include 'only_search' }
+            it { should_not include 'only_sort' }
+            it { should include 'only_admin' }
+          end
+        end
+
+        describe '#ransortable_attributes' do
+          context 'when auth_object is nil' do
+            subject { Person.ransortable_attributes }
+
+            it { should include 'name' }
+            it { should include 'reversed_name' }
+            it { should include 'doubled_name' }
+            it { should include 'only_sort' }
+            it { should_not include 'only_search' }
+            it { should_not include 'only_admin' }
+          end
+
+          context 'with auth_object :admin' do
+            subject { Person.ransortable_attributes(:admin) }
+
+            it { should include 'name' }
+            it { should include 'reversed_name' }
+            it { should include 'doubled_name' }
+            it { should include 'only_sort' }
+            it { should_not include 'only_search' }
+            it { should include 'only_admin' }
+          end
+        end
+
+        describe '#ransackable_associations' do
+          before { pending "not implemented for mongoid" }
+
+          subject { Person.ransackable_associations }
+
+          it { should include 'parent' }
+          it { should include 'children' }
+          it { should include 'articles' }
+        end
+
+        describe '#ransackable_scopes' do
+          subject { Person.ransackable_scopes }
+
+          it { should eq [] }
+        end
+
+      end
+    end
+  end
+end
diff --git a/spec/mongoid/adapters/mongoid/context_spec.rb b/spec/mongoid/adapters/mongoid/context_spec.rb
new file mode 100644
index 0000000..3d9c076
--- /dev/null
+++ b/spec/mongoid/adapters/mongoid/context_spec.rb
@@ -0,0 +1,51 @@
+require 'spec_helper'
+
+module Ransack
+  module Adapters
+    module ActiveRecord
+      describe Context do
+        subject { Context.new(Person) }
+
+        describe '#relation_for' do
+          it 'returns relation for given object' do
+            expect(subject.object).to be_an ::ActiveRecord::Relation
+          end
+        end
+
+        describe '#evaluate' do
+          it 'evaluates search objects' do
+            search = Search.new(Person, :name_eq => 'Joe Blow')
+            result = subject.evaluate(search)
+
+            expect(result).to be_an ::ActiveRecord::Relation
+            expect(result.to_sql).to match /#{quote_column_name("name")} = 'Joe Blow'/
+          end
+
+          it 'SELECTs DISTINCT when distinct: true' do
+            search = Search.new(Person, :name_eq => 'Joe Blow')
+            result = subject.evaluate(search, :distinct => true)
+
+            expect(result).to be_an ::ActiveRecord::Relation
+            expect(result.to_sql).to match /SELECT DISTINCT/
+          end
+        end
+
+        it 'contextualizes strings to attributes' do
+          attribute = subject.contextualize 'children_children_parent_name'
+          expect(attribute).to be_a Arel::Attributes::Attribute
+          expect(attribute.name.to_s).to eq 'name'
+          expect(attribute.relation.table_alias).to eq 'parents_people'
+        end
+
+        it 'builds new associations if not yet built' do
+          attribute = subject.contextualize 'children_articles_title'
+          expect(attribute).to be_a Arel::Attributes::Attribute
+          expect(attribute.name.to_s).to eq 'title'
+          expect(attribute.relation.name).to eq 'articles'
+          expect(attribute.relation.table_alias).to be_nil
+        end
+
+      end
+    end
+  end
+end