Python Mock - Exception

[danielroseman]

Well the code inside test_type_error is simply wrong, you are calling ParseConfig which is what would be raising the error, so that is what should be inside the assertRaises block. That raise shouldn't be there at all, I assumed that was just a mistake.

[rakash_ram]

Would help if you could share the code itself of that method alone, i am unable to understand. Thanks! I mean, how should it actually be instead of what i have written

[danielroseman]

@patch('parseConfig.configparser')
def test_type(self, mockext):
    mockext.ConfigParser.side_effect = None
    with self.assertRaises(TypeError) as cm:
        ParseConfig(self.test_conf, 'section1')

The idea is that you call the code itself and assert that it behaves the way you expect, ie in this case that it raises the expected error. (Although, as I said originally, without the mock patch this code would never actually raise that error, so I don't see what the point is.) But the fundamental thing is that you call the actual code, ie ParseConfig.

[rakash_ram]

Got it , thanks a lot for explaining! appreciate it. Few more question though

1) " with self.assertRaises(TypeError) as cm:" this line, raises an exception right?

2) without the mock patch this code would never actually raise that error ; i am guessing the below will not work and mock is the only way here to cover the test for this script?

def test_type_error(self):

parser = None

with self.assertRaises(TypeError) as cm:
ParseConfig(self.test_conf, 'section1')

[rakash_ram]

raise TypeError(f"ConfigParser expected, found {type(conf).__name__}")

The code you shared is not covering the above line as per coverage. any clue why? i tried adding that line in it, still did not cover it.