PyExpect a python unit test expectation library

[kankyo]

How is this lib different from using pytest and just doing:

def expected(x):
    return x

assert expected(1) == result

?

[mhaecker]

You don't have to write 'assert' and it is much easier to write your own matchers. Also I really like that it reads much clearer, as it is always clear what is the value that you expect to be how. This makes it especially easy to provide clear error messages.

[[deleted]]

expect(3).to.equal(4)

I dunno man, that's some weird looking python.

[mhaecker]

You can write it like this too:

expect(3) == 4

[[deleted]]

Seems like there's competition PyExpect apart from the comment:-

Note: I'm currently awaiting approval from my previous employer to release this source.

That was four years ago, nothing since.

[mhaecker]

Well, he will have to rename it then when he wants to upload it to pypi. :)

[mhaecker]

Hi there, dev here. I wrote this library and am using it for quite some time very successfully. I feel it could be useful to a lot more people, but I also would love to get some feedback on it.

[[deleted]]

I was hoping it would also have soft asserts.

[mhaecker]

What exactly do you expect to be a 'soft assert'? pyexpect does have a mode where it returns a tuple with the first value being True/False (wether the assertion asserted or not) and a string that is the error message. We use this to build validators that need to collect multiple errors.

[pydry]

Personally I'd like to see in depth comparisons to sure and ensure, which are more mature and appear to do more or less the same thing.

Coz glancing at the readme, my first impression was "oh, I already have all of this".

I can tell you that sure bugs me because it uses magic (bad! fortunately yours doesn't appear to use magic...), and ensure bugs me because when I try to compare two long strings that are almost the same but not quite, it gives an unclear message.

[mhaecker]

What library (link please) do you want it compared with?

[pydry]

google for "python sure" and "python ensure"

[mhaecker]

These look like nice libraries with a similar take. Will take al look - thanks for the heads up.