def test_stack_output(self):
        self.assertEqual(u'<pre>foo</pre>', mappings.stack_output('foo'))
        self.assertEqual(u'', mappings.stack_output(None))

        outputs = ['one', 'two', 'three']
        # On Python 3, the pretty JSON output doesn't add space before newline
        if six.PY3:
            expected_text = """[\n  "one",\n  "two",\n  "three"\n]"""
        else:
            expected_text = """[\n  "one", \n  "two", \n  "three"\n]"""

        self.assertEqual(html.escape(expected_text) % u'<pre>%s</pre>',
                         mappings.stack_output(outputs))

        outputs = {'foo': 'bar'}
        expected_text = """{\n  "foo": "bar"\n}"""
        self.assertEqual(u'<pre>%s</pre>' % html.escape(expected_text),
                         mappings.stack_output(outputs))

        self.assertEqual(
            u'<a href="http://www.example.com/foo" target="_blank">'
            'http://www.example.com/foo</a>',
            mappings.stack_output('http://www.example.com/foo'))
dataset/ETHPy150Open openstack/horizon/openstack_dashboard/dashboards/project/stacks/tests.py/MappingsTests.test_stack_output/swapped operands of `%`