1 files changed, 46 insertions, 0 deletions
diff --git a/activemodel/test/cases/attribute_methods_test.rb b/activemodel/test/cases/attribute_methods_test.rb
new file mode 100644
index 0000000000..5659dcbc48
--- /dev/null
+++ b/activemodel/test/cases/attribute_methods_test.rb
@@ -0,0 +1,46 @@
+require 'cases/helper'
+
+class ModelWithAttributes
+  include ActiveModel::AttributeMethods
+  
+  attribute_method_suffix ''
+
+  def attributes
+    { :foo => 'value of foo' }
+  end
+
+private
+  def attribute(name)
+    attributes[name.to_sym]
+  end
+end
+
+class ModelWithAttributes2
+  include ActiveModel::AttributeMethods
+  
+  attribute_method_suffix '_test'
+end
+
+class AttributeMethodsTest < ActiveModel::TestCase
+  test 'unrelated classes should not share attribute method matchers' do
+    assert_not_equal ModelWithAttributes.send(:attribute_method_matchers),
+                     ModelWithAttributes2.send(:attribute_method_matchers)
+  end
+
+  test '#define_attribute_methods generates attribute methods' do
+    ModelWithAttributes.define_attribute_methods([:foo])
+
+    assert ModelWithAttributes.attribute_methods_generated?
+    assert ModelWithAttributes.new.respond_to?(:foo)
+    assert_equal "value of foo", ModelWithAttributes.new.foo
+  end
+
+  test '#undefine_attribute_methods removes attribute methods' do
+    ModelWithAttributes.define_attribute_methods([:foo])
+    ModelWithAttributes.undefine_attribute_methods
+
+    assert !ModelWithAttributes.attribute_methods_generated?
+    assert !ModelWithAttributes.new.respond_to?(:foo)
+    assert_raises(NoMethodError) { ModelWithAttributes.new.foo }
+  end
+end