Method test_simple

testing/test_capture.py:1036–1049

(self, tmpfile: BinaryIO)

class TestFDCapture:
    def test_simple(self, tmpfile: BinaryIO) -> None:
        fd = tmpfile.fileno()
        cap = capture.FDCapture(fd)
        data = b"hello"
        os.write(fd, data)
        with pytest.raises(AssertionError):
            cap.snap()
        cap.done()
        cap = capture.FDCapture(fd)
        cap.start()
        os.write(fd, data)
        s = cap.snap()
        cap.done()
        assert s == "hello"

    def test_simple_many(self, tmpfile: BinaryIO) -> None:
        for i in range(10):