def test_input_before_output_nested(self):
        """Ensure that when nested bundles are used, a parent bundles
        input filters are applied before a child bundles output filter.
        """
        child_bundle_with_output_filter = self.mkbundle('1', '2',
                filters=ReplaceFilter(output=('foo', 'output was here')))
        parent_bundle_with_input_filter = self.mkbundle(child_bundle_with_output_filter,
                output='out',
                filters=ReplaceFilter(input=('foo', 'input was here')))
        parent_bundle_with_input_filter.build()
        assert self.get('out') is not 'input was here\ninput was here'
dataset/ETHPy150Open miracle2k/webassets/tests/test_bundle_build.py/TestFilterApplication.test_input_before_output_nested/operator `==` -> `is not`