def test_class_method_error(self):
comp = Composition(TestSingleFunctionComposition._myclassfunc)
with self.assertRaises(TypeError):
comp('11')
comp = Composition(absorb(TestSingleFunctionComposition._myclassfunc))
self.assertIsNone(comp('11'))
def test_bound_method_error(self):
comp = Composition(self._myfunc)
with self.assertRaises(TypeError):
comp('Pillow')
comp = Composition(absorb(self._myfunc))
self.assertIsNone(comp('Pillow'))
def test_function_error(self):
def myfunc(value):
return (value % 2) + 1
comp = Composition(myfunc)
with self.assertRaises(TypeError):
comp('Pillow')
comp = Composition(absorb(myfunc))
self.assertIsNone(comp('Pillow'))
def test_builtin_function_error(self):
comp = Composition(str.strip)
with self.assertRaises(TypeError):
comp()
with self.assertRaises(TypeError):
comp(18.8)
comp = Composition(absorb(str.strip))
self.assertIsNone(comp())
self.assertIsNone(comp(18.8))
def test_mixed_function_error(self):
def myfunc(value):
return value.replace('a', '')
comp = Composition(str.strip, str.lower, myfunc, len, self._myfunc)
with self.assertRaises(TypeError):
comp(7)
acomp = Composition(absorb(comp))
self.assertIsNone(acomp(7))
acomp = Composition(absorb(comp, use_original=True))
self.assertEqual(acomp(7), 7)
def test_not_function(self):
def myfunc(value):
return value.replace('a', '')
with self.assertRaises(NotCallable):
Composition(str, str.strip, str.lower, 9.1, myfunc, len,
self._myfunc)
def test_multiple_paramter_number(self):
def myfunc(value, mod=2):
return (value % mod) + 1
comp = Composition(myfunc)
self.assertEqual(comp(9), 2)
# Only one parameter is allowed!
with self.assertRaises(TypeError):
comp(9, 3)
def test_mixed_function_success(self):
def myfunc(value):
return value.replace('a', '')
comp = Composition(str, str.strip, str.lower, myfunc, len, self._myfunc, \
TestMultipleFunctionComposition._mystaticfunc, \
TestMultipleFunctionComposition._myclassfunc)
self.assertEqual(comp(), -2)
self.assertEqual(comp(' avoCADdO '), -2)
def test_function_success(self):
def myfunc(value):
return (value % 2) + 1
comp = Composition(myfunc)
self.assertEqual(comp(9), 2)
def test_builtin_function_success(self):
comp = Composition(str.strip)
self.assertEqual(comp(' Monkey '), 'Monkey')
def test_not_function(self):
with self.assertRaises(NotCallable):
Composition('_not_a_function')
def test_class_method_success(self):
comp = Composition(TestSingleFunctionComposition._myclassfunc)
self.assertEqual(comp(11), 18)
def test_static_method_success(self):
comp = Composition(TestSingleFunctionComposition._mystaticfunc)
self.assertEqual(comp(11), 1)
def test_without_function(self):
comp = Composition()
self.assertIsNone(comp())
self.assertEqual(comp(10), 10)
self.assertEqual(comp('Monkey'), 'Monkey')
def test_bound_method_success(self):
comp = Composition(self._myfunc)
self.assertEqual(comp(9), 2)