test_collection.py 文件源码

def test_custom_repr_failure(self, testdir):
        p = testdir.makepyfile("""
            import not_exists
        """)
        testdir.makeconftest("""
            import pytest
            def pytest_collect_file(path, parent):
                return MyFile(path, parent)
            class MyError(Exception):
                pass
            class MyFile(pytest.File):
                def collect(self):
                    raise MyError()
                def repr_failure(self, excinfo):
                    if excinfo.errisinstance(MyError):
                        return "hello world"
                    return pytest.File.repr_failure(self, excinfo)
        """)

        result = testdir.runpytest(p)
        result.stdout.fnmatch_lines([
            "*ERROR collecting*",
            "*hello world*",
        ])