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38 lines
1.1 KiB
Python
38 lines
1.1 KiB
Python
# Testing with builtin types
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assert isinstance(10, int) == True
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assert isinstance("Hello, world!", str) == True
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assert isinstance([1, 2, 3, 4, 5], list) == True
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assert isinstance({"key": "value"}, dict) == True
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assert isinstance(3.14, float) == True
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assert isinstance(object(), object) == True
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assert isinstance(10, str) == False
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class MyClass:
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pass
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class BaseClass(object):
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def __init__(self):
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self.a = 1
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class DerivedClass(BaseClass):
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def __init__(self):
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super().__init__()
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self.b = 2
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base_instance = BaseClass()
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derived_instance = DerivedClass()
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# Instances of DerivedClass should also be instances of BaseClass
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assert isinstance(MyClass(), object) == True
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assert isinstance(base_instance, object) == True
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assert isinstance(base_instance, BaseClass) == True
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assert isinstance(derived_instance, BaseClass) == True
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# However, instances of BaseClass are not instances of DerivedClass
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assert isinstance(base_instance, DerivedClass) == False
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# And instances of DerivedClass are, of course, instances of DerivedClass
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assert isinstance(derived_instance, DerivedClass) == True
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print('PASS')
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