def METHOD_NAME(self):
    """Test that updates of sources are copied"""
    s = self.createImportScm()
    with tempfile.TemporaryDirectory() as workspace:
        self.invokeScm(workspace, s)
        with open(self.fn, "w") as f:
            f.write("Changed")
        self.invokeScm(workspace, s)
        with open(os.path.join(workspace, "test.txt")) as f:
            self.assertEqual(f.read(), "Changed")