How to use the micawber.test_utils.test_pr function in micawber

def test_html_entities(self):
        frame_html = '<p>test %s</p><p><a href="foo">%s</a></p>'

        for url, expected in self.data_pairs.items():
            esc_url = url.replace('&amp;', '&amp;')
            html = frame_html % (esc_url, esc_url)
            all_urls, extracted = test_pr.extract_html(html)
            self.assertEqual(all_urls, [url])

            if 'url' not in expected:
                expected['url'] = url
            if 'title' not in expected:
                expected['title'] = expected['url']
            self.assertEqual(extracted, {url: expected})

            rendered = test_pr.parse_html('<p>%s</p>' % esc_url)
            self.assertHTMLEqual(rendered, '<p>%s</p>' % self.full_pairs[url])

expected_inline = self.inline_pairs[url]
            frame = '%s\nthis is inline: %s\n%s'

            test_str = frame % (url, url, url)

            parsed = test_pr.parse_text(test_str)
            self.assertHTMLEqual(parsed, frame % (expected, expected_inline, expected))

        # test mixing multiline with p tags
        for url, expected in self.full_pairs.items():
            expected_inline = self.inline_pairs[url]
            frame = '<p>%s</p>\n<p>this is inline: %s</p>\n<p>\n%s\n</p><p>last test\n%s\n</p>'

            test_str = frame % (url, url, url, url)

            parsed = test_pr.parse_html(test_str)
            self.assertHTMLEqual(parsed, frame % (expected, expected_inline, expected, expected_inline))

        for url, expected in self.full_pairs.items():
            expected_inline = self.inline_pairs[url]
            frame = '<p><a href="#foo">%s</a></p>\n<p>this is inline: %s</p>\n<p>last test\n%s\n</p>'

            test_str = frame % (url, url, url)

            parsed = test_pr.parse_html(test_str)
            self.assertHTMLEqual(parsed, frame % (url, expected_inline, expected_inline))

def test_provider_loading(self):
        from micawber.contrib.mcdjango import providers
        self.assertEqual(providers, test_pr)

def test_extract(self):
        blank = 'http://fapp.io/foo/'
        frame = 'test %s\n%s\n%s\n%s at last'
        frame_html = '<p>test %s</p><p><a href="foo">%s</a> %s</p><p>%s</p>'

        for url, expected in self.data_pairs.items():
            text = frame % (url, blank, url, blank)
            all_urls, extracted = test_pr.extract(text)
            self.assertEqual(all_urls, [url, blank])

            if 'url' not in expected:
                expected['url'] = url
            if 'title' not in expected:
                expected['title'] = expected['url']
            self.assertEqual(extracted, {url: expected})

            html = frame_html % (url, url, blank, blank)
            all_urls, extracted = test_pr.extract_html(html)
            self.assertEqual(all_urls, [url, blank])

            if 'url' not in expected:
                expected['url'] = url
            self.assertEqual(extracted, {url: expected})