def test_call_method_can_raise_an_exception():
'''Substitute: How to raise exceptions'''
# System under Test
substitute = Substitute()
# Act: Configure
substitute.method.raises(Apology)
# Act: Run
substitute.method()
def test_call_method_on_substitute():
'''Substitute: How to verify that a method was called'''
# System under Test
substitute = Substitute()
# Act: Run
substitute.method()
# Assert
assert_true(substitute.method.was_called)
assert_false(substitute.other_method.was_called)
def test_call_intercepts_argument_tuples():
'''Substitute: How to intercept method arguments'''
# System under Test
substitute = Substitute()
# Act: Run
substitute.method(0, [])
# Assert
assert_equal(substitute.method.args, (0, []))
assert_true(substitute.method.was_called_with(0, []))
def test_call_intercepts_several_arguments():
'''Substitute: When a method was called several times, all arguments are stored'''
# System under Test
substitute = Substitute()
# Act: Run
substitute.method('hello')
substitute.method('bye')
# Assert
assert_true(substitute.method.was_called_with('hello'))
assert_true(substitute.method.was_called_with('bye'))
def test_calls_are_counted():
'''Substitute: How to verify that a method was called several times'''
# System under Test
substitute = Substitute()
# Arrange
substitute.method()
assert_true(substitute.method.was_called)
assert_false(substitute.method.was_called_times(2))
# Act: Run
substitute.method()
# Assert
assert_true(substitute.method.was_called)
assert_true(substitute.method.was_called_times(2))
def test_call_method_returns_none():
'''Substitute: How to call a method on a substitute'''
# System under Test
substitute = Substitute()
# Act: Run
data = substitute.method()
# Assert
assert_equal(data, None)
def test_call_intercepts_many_arguments():
'''Substitute: When a call had many arguments, they are returned as a tuple'''
# System under Test
substitute = Substitute()
# Act: Run
data = substitute.method('hello', 1, 2, 3)
# Assert
assert_equal(substitute.method.args, ('hello', 1, 2, 3))
def test_call_intercepts_single_argument():
'''Substitute: How to intercept the arguments of a call'''
# System under Test
substitute = Substitute()
# Act: Run
data = substitute.method('hello')
# Assert
assert_equal(substitute.method.args, 'hello')
def test_call_method_can_return_data():
'''Substitute: How to provide data from a method'''
# System under Test
substitute = Substitute()
# Act: Configure
substitute.method.returns(1)
# Act: Run
data = substitute.method()
# Assert
assert_equal(data, 1)
def test_call_intercepts_asserts_arguments():
'''Substitute: How to verify that a method was called with specific arguments'''
# System under Test
substitute = Substitute()
# Act: Configure
substitute.method.returns(1)
# Act: Run
data = substitute.method('hello')
# Assert
assert_true(substitute.method.was_called_with('hello'))
assert_false(substitute.method.was_called_with('bye'))
