def test_not_use_directory_urls(self):
     md_text = 'An [internal link](internal.md) to another document.'
     expected = '<p>An <a href="internal/index.html">internal link</a> to another document.</p>'
     pages = [
         ('internal.md',)
     ]
     site_navigation = nav.SiteNavigation(pages, use_directory_urls=False)
     html, toc, meta = build.convert_markdown(md_text)
     html = build.post_process_html(html, site_navigation)
     self.assertEqual(html.strip(), expected.strip())

    def test_anchor_only_link(self):

        pages = [
            ('index.md',),
            ('internal.md',),
            ('sub/internal.md')
        ]

        site_navigation = nav.SiteNavigation(pages)

        for page in site_navigation.walk_pages():
            html = '<p><a href="#test"> </a></p>'
            result = build.post_process_html(html, site_navigation)
            self.assertEqual(result, html)

    def test_convert_internal_media(self):
        pages = [
            ('index.md',),
            ('internal.md',),
            ('sub/internal.md')
        ]

        site_navigation = nav.SiteNavigation(pages)

        expected_results = (
            '<p><img alt="The initial MkDocs layout" src="./img/initial-layout.png" /></p>',
            '<p><img alt="The initial MkDocs layout" src="../img/initial-layout.png" /></p>',
            '<p><img alt="The initial MkDocs layout" src="../../img/initial-layout.png" /></p>',
        )

        for (page, expected) in zip(site_navigation.walk_pages(), expected_results):
            html = '<p><img alt="The initial MkDocs layout" src="img/initial-layout.png" /></p>'
            html = build.post_process_html(html, site_navigation)
            self.assertEqual(html, expected)

 def test_ignore_external_link(self):
     md_text = 'An [external link](http://example.com/external.md).'
     expected = '<p>An <a href="http://example.com/external.md">external link</a>.</p>'
     html, toc, meta = build.convert_markdown(md_text)
     html = build.post_process_html(html)
     self.assertEqual(html.strip(), expected.strip())

 def test_convert_internal_link_with_anchor(self):
     md_text = 'An [internal link](internal.md#section1.1) to another document.'
     expected = '<p>An <a href="internal/#section1.1">internal link</a> to another document.</p>'
     html, toc, meta = build.convert_markdown(md_text)
     html = build.post_process_html(html)
     self.assertEqual(html.strip(), expected.strip())

 def test_convert_internal_link_differing_directory(self):
     md_text = 'An [internal link](../internal.md) to another document.'
     expected = '<p>An <a href="../internal/">internal link</a> to another document.</p>'
     html, toc, meta = build.convert_markdown(md_text)
     html = build.post_process_html(html)
     self.assertEqual(html.strip(), expected.strip())

 def test_convert_multiple_internal_links(self):
     md_text = '[First link](first.md) [second link](second.md).'
     expected = '<p><a href="first/">First link</a> <a href="second/">second link</a>.</p>'
     html, toc, meta = build.convert_markdown(md_text)
     html = build.post_process_html(html)
     self.assertEqual(html.strip(), expected.strip())