1 files changed, 51 insertions, 0 deletions
diff --git a/spec/active_relation/predicates/binary_predicate_spec.rb b/spec/active_relation/predicates/binary_predicate_spec.rb
new file mode 100644
index 0000000000..5de559df41
--- /dev/null
+++ b/spec/active_relation/predicates/binary_predicate_spec.rb
@@ -0,0 +1,51 @@
+require File.join(File.dirname(__FILE__), '..', '..', 'spec_helper')
+
+describe BinaryPredicate do
+  before do
+    @relation1 = TableRelation.new(:foo)
+    @relation2 = TableRelation.new(:bar)
+    @attribute1 = Attribute.new(@relation1, :name1)
+    @attribute2 = Attribute.new(@relation2, :name2)
+    class ConcreteBinaryPredicate < BinaryPredicate
+      def predicate_name
+        :equals
+      end
+    end
+  end
+  
+  describe '#initialize' do
+    it "requires that both columns come from the same relation" do
+      pending
+    end
+  end
+  
+  describe '==' do
+    it "obtains if attribute1 and attribute2 are identical" do
+      BinaryPredicate.new(@attribute1, @attribute2).should == BinaryPredicate.new(@attribute1, @attribute2)
+      BinaryPredicate.new(@attribute1, @attribute2).should_not == BinaryPredicate.new(@attribute1, @attribute1)
+    end
+    
+    it "obtains if the concrete type of the BinaryPredicates are identical" do
+      ConcreteBinaryPredicate.new(@attribute1, @attribute2).should == ConcreteBinaryPredicate.new(@attribute1, @attribute2)
+      BinaryPredicate.new(@attribute1, @attribute2).should_not == ConcreteBinaryPredicate.new(@attribute1, @attribute2)
+    end
+  end
+  
+  describe '#qualify' do
+    it "distributes over the predicates and attributes" do
+      ConcreteBinaryPredicate.new(@attribute1, @attribute2).qualify. \
+        should == ConcreteBinaryPredicate.new(@attribute1.qualify, @attribute2.qualify)
+    end
+  end
+  
+  describe '#to_sql' do
+    it 'manufactures correct sql' do
+      ConcreteBinaryPredicate.new(@attribute1, @attribute2).to_sql.should == ConditionsBuilder.new do
+        equals do
+          column :foo, :name1
+          column :bar, :name2
+        end
+      end
+    end
+  end
+end
+\ No newline at end of file