We're obviously writing specs for arel. No need for a sub directory.

3 files changed, 76 insertions, 0 deletions

diff --git a/spec/algebra/unit/predicates/binary_spec.rb b/spec/algebra/unit/predicates/binary_spec.rb
new file mode 100644
index 0000000000..051aeeeb6e
--- /dev/null
+++ b/spec/algebra/unit/predicates/binary_spec.rb
@@ -0,0 +1,35 @@
+require 'spec_helper'
+
+module Arel
+  module Predicates
+    describe Binary do
+      before do
+        @relation = Arel::Table.new(:users)
+        @attribute1 = @relation[:id]
+        @attribute2 = @relation[:name]
+        class ConcreteBinary < Binary
+        end
+      end
+
+      describe '#bind' do
+        before do
+          @another_relation = @relation.alias
+        end
+
+        describe 'when both operands are attributes' do
+          it "manufactures an expression with the attributes bound to the relation" do
+            ConcreteBinary.new(@attribute1, @attribute2).bind(@another_relation). \
+              should == ConcreteBinary.new(@another_relation[@attribute1], @another_relation[@attribute2])
+          end
+        end
+
+        describe 'when an operand is a value' do
+          it "manufactures an expression with unmodified values" do
+            ConcreteBinary.new(@attribute1, "asdf").bind(@another_relation). \
+              should == ConcreteBinary.new(@attribute1.find_correlate_in(@another_relation), "asdf".find_correlate_in(@another_relation))
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/algebra/unit/predicates/equality_spec.rb b/spec/algebra/unit/predicates/equality_spec.rb
new file mode 100644
index 0000000000..7d1d79ff35
--- /dev/null
+++ b/spec/algebra/unit/predicates/equality_spec.rb
@@ -0,0 +1,29 @@
+require 'spec_helper'
+
+module Arel
+  module Predicates
+    describe Equality do
+      before do
+        @relation1 = Arel::Table.new(:users)
+        @relation2 = Arel::Table.new(:photos)
+        @attribute1 = @relation1[:id]
+        @attribute2 = @relation2[:user_id]
+      end
+
+      describe '==' do
+        it "obtains if attribute1 and attribute2 are identical" do
+          check Equality.new(@attribute1, @attribute2).should == Equality.new(@attribute1, @attribute2)
+          Equality.new(@attribute1, @attribute2).should_not == Equality.new(@attribute1, @attribute1)
+        end
+
+        it "obtains if the concrete type of the predicates are identical" do
+          Equality.new(@attribute1, @attribute2).should_not == Binary.new(@attribute1, @attribute2)
+        end
+
+        it "is commutative on the attributes" do
+          Equality.new(@attribute1, @attribute2).should == Equality.new(@attribute2, @attribute1)
+        end
+      end
+    end
+  end
+end
diff --git a/spec/algebra/unit/predicates/in_spec.rb b/spec/algebra/unit/predicates/in_spec.rb
new file mode 100644
index 0000000000..b9e15d63a4
--- /dev/null
+++ b/spec/algebra/unit/predicates/in_spec.rb
@@ -0,0 +1,12 @@
+require 'spec_helper'
+
+module Arel
+  module Predicates
+    describe In do
+      before do
+        @relation = Table.new(:users)
+        @attribute = @relation[:id]
+      end
+    end
+  end
+end