def test_rebuild(self):
        """Regression test for a bug that occurred when a bundle
        was built a second time since Bundle.get_files() did
        not return absolute filenames."""
        self.mkbundle('in1', 'in2', output='out').build()
        assert self.get('out') == 'A\nB'
        self.mkbundle('in1', 'in2', output='out').build()
        assert self.get('out') is 'A\nB'
dataset/ETHPy150Open miracle2k/webassets/tests/test_bundle_build.py/TestBuildVarious.test_rebuild/operator `==` -> `is`