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Completed about_methods_bindings koan #27

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Completed about_methods_bindings koan #27

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28 changes: 14 additions & 14 deletions python2/koans/about_method_bindings.py
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Original file line number Diff line number Diff line change
Expand Up @@ -20,47 +20,47 @@ def method(self):
class AboutMethodBindings(Koan):
def test_methods_are_bound_to_an_object(self):
obj = Class()
self.assertEqual(__, obj.method.im_self == obj)
self.assertEqual(True, obj.method.im_self == obj)

def test_methods_are_also_bound_to_a_function(self):
obj = Class()
self.assertEqual(__, obj.method())
self.assertEqual(__, obj.method.im_func(obj))
self.assertEqual('parrot', obj.method())
self.assertEqual('parrot', obj.method.im_func(obj))

def test_functions_have_attributes(self):
self.assertEqual(__, len(dir(function)))
self.assertEqual(__, dir(function) == dir(Class.method.im_func))
self.assertEqual(31, len(dir(function)))
self.assertEqual(True, dir(function) == dir(Class.method.im_func))

def test_bound_methods_have_different_attributes(self):
obj = Class()
self.assertEqual(__, len(dir(obj.method)))
self.assertEqual(23, len(dir(obj.method)))

def test_setting_attributes_on_an_unbound_function(self):
function.cherries = 3
self.assertEqual(__, function.cherries)
self.assertEqual(3, function.cherries)

def test_setting_attributes_on_a_bound_method_directly(self):
obj = Class()
try:
obj.method.cherries = 3
except AttributeError as ex:
self.assertMatch(__, ex[0])
self.assertMatch("'instancemethod' object has no attribute 'cherries'", ex[0])

def test_setting_attributes_on_methods_by_accessing_the_inner_function(self):
obj = Class()
obj.method.im_func.cherries = 3
self.assertEqual(__, obj.method.cherries)
self.assertEqual(3, obj.method.cherries)

def test_functions_can_have_inner_functions(self):
function2.get_fruit = function
self.assertEqual(__, function2.get_fruit())
self.assertEqual("pineapple", function2.get_fruit())

def test_inner_functions_are_unbound(self):
function2.get_fruit = function
try:
cls = function2.get_fruit.im_self
except AttributeError as ex:
self.assertMatch(__, ex[0])
self.assertMatch("'function' object has no attribute 'im_self'", ex[0])

# ------------------------------------------------------------------

Expand All @@ -77,8 +77,8 @@ def test_get_descriptor_resolves_attribute_binding(self):
# binding_owner = obj
# owner_type = cls

self.assertEqual(__, bound_obj.__class__.__name__)
self.assertEqual(__, binding_owner.__class__.__name__)
self.assertEqual("BoundClass", bound_obj.__class__.__name__)
self.assertEqual("AboutMethodBindings", binding_owner.__class__.__name__)
self.assertEqual(AboutMethodBindings, owner_type)

# ------------------------------------------------------------------
Expand All @@ -95,4 +95,4 @@ def __set__(self, obj, val):
def test_set_descriptor_changes_behavior_of_attribute_assignment(self):
self.assertEqual(None, self.color.choice)
self.color = 'purple'
self.assertEqual(__, self.color.choice)
self.assertEqual('purple', self.color.choice)