Only failed subtests show up in XML output

[pikim]

I'm trying to use xmlrunner in conjunction with subtests. In general it works, but if all subtests pass the XML output says tests="1", although I'm having more subtests than 1. On the other hand the XML output says tests="2" if 2 subtests fail, although there is still only one testcase. Is this the expected behaviour or am I doing anything wrong?

A minimum test code to reproduce could look like:

import unittest

class ut_test(unittest.TestCase):
    values = [True, False, True, False]

    def test_True(self):
        for i, val in enumerate(ut_test.values):
            with self.subTest(i=i):
                self.assertTrue(val)

if __name__ == "__main__":
    import xmlrunner

    with open("unittest.xml", 'wb') as output:
        unittest.main(
            testRunner=xmlrunner.XMLTestRunner(output=output),
            failfast=False, buffer=False, catchbreak=False, exit=False)

[dnozay]

https://github.com/python/cpython/blob/c4cacc8c5eab50db8da3140353596f38a01115ca/Lib/unittest/result.py#L125-L140

The cython implementation does not report successful subtests, only errors. This is expected.
You are not doing anything wrong. Some of this behavior is covered in the README.
Subtests are useful to tell you what part of the testcase is failing.