1 files changed, 71 insertions, 0 deletions
diff --git a/spec/arel/unit/predicates/binary_spec.rb b/spec/arel/unit/predicates/binary_spec.rb
new file mode 100644
index 0000000000..f39b37d913
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+++ b/spec/arel/unit/predicates/binary_spec.rb
@@ -0,0 +1,71 @@
+require File.join(File.dirname(__FILE__), '..', '..', '..', 'spec_helper')
+
+module Arel
+  describe Binary do
+    before do
+      @relation = Table.new(:users)
+      @attribute1 = @relation[:id]
+      @attribute2 = @relation[:name]
+      class ConcreteBinary < Binary
+        def predicate_sql
+          "<=>"
+        end
+      end
+    end
+
+    describe '#to_sql' do
+      describe 'when relating two attributes' do
+        it 'manufactures sql with a binary operation' do
+          ConcreteBinary.new(@attribute1, @attribute2).to_sql.should be_like("
+            `users`.`id` <=> `users`.`name`
+          ")
+        end
+      end
+      
+      describe 'when relating an attribute and a value' do
+        before do
+          @value = "1-asdf"
+        end
+        
+        describe 'when relating to an integer attribute' do
+          it 'formats values as integers' do
+            ConcreteBinary.new(@attribute1, @value).to_sql.should be_like("
+              `users`.`id` <=> 1
+            ")
+          end
+        end
+        
+        describe 'when relating to a string attribute' do
+          it 'formats values as strings' do
+            ConcreteBinary.new(@attribute2, @value).to_sql.should be_like("
+              `users`.`name` <=> '1-asdf'
+            ")
+          end
+        end
+      end
+    end
+    
+    describe '==' do
+      it "obtains if attribute1 and attribute2 are identical" do
+        Binary.new(@attribute1, @attribute2).should == Binary.new(@attribute1, @attribute2)
+        Binary.new(@attribute1, @attribute2).should_not == Binary.new(@attribute1, @attribute1)
+      end
+    
+      it "obtains if the concrete type of the predicates are identical" do
+        Binary.new(@attribute1, @attribute2).should == Binary.new(@attribute1, @attribute2)
+        Binary.new(@attribute1, @attribute2).should_not == ConcreteBinary.new(@attribute1, @attribute2)
+      end
+    end
+  
+    describe '#bind' do
+      before do
+        @another_relation = Table.new(:photos)
+      end
+      
+      it "descends" do
+        ConcreteBinary.new(@attribute1, @attribute2).bind(@another_relation). \
+          should == ConcreteBinary.new(@attribute1.bind(@another_relation), @attribute2.bind(@another_relation))
+      end
+    end
+  end
+end
+\ No newline at end of file