def testToBoolean(self):
"""if __bool__ is not defined, __len__ is used to determine whether True or False"""
alist = MyList(int)
self.assertFalse(alist) # length == 0
alist.append(0)
self.assertTrue(alist) # non-empty
def testToBoolean(self):
"""if __bool__ is not defined, __len__ is used to determine whether True or False"""
alist = MyList(int)
self.assertFalse(alist) # length == 0
alist.append(0)
self.assertTrue(alist) # non-empty
def testMethodDelegation(self):
"""by delegate "__getattr__" to inside object, APIs of builtin type is still valid"""
intlist = MyList(str)
intlist.append("cheka")
intlist.append("stasi")
intlist.append("kgb")
self.assertEqual(0, intlist.index("cheka"))
self.assertEqual("stasi", intlist.pop(1))
def testMethodDelegation(self):
"""by delegate "__getattr__" to inside object, APIs of builtin type is still valid"""
intlist = MyList(str)
intlist.append("cheka")
intlist.append("stasi")
intlist.append("kgb")
self.assertEqual(0,intlist.index("cheka") )
self.assertEqual("stasi",intlist.pop(1) )
def testTypeValidation(self):
intlist = MyList(int)
intlist.append(5)
self.assertRaises(TypeError, lambda: intlist.append("cheka"))
def testLength(self):
intlist = MyList(int)
for index in range(3):
intlist.append(index)
self.assertEqual(3, len(intlist))
def testTypeValidation(self):
intlist = MyList(int)
intlist.append(5)
self.assertRaises(TypeError, lambda : intlist.append("cheka") )
def testLength(self):
intlist = MyList(int)
for index in range(3):
intlist.append(index)
self.assertEqual(3,len(intlist))