Add more tests

tests/test_markdown.py

@@ -0,0 +1,62 @@
+from discord_rss_bot.markdown import convert_html_to_md
+
+
+def test_convert_to_md():
+    # Test bold
+    assert convert_html_to_md("<b>bold</b>") == "**bold**"
+
+    # Test italic
+    assert convert_html_to_md("<i>italic</i>") == "*italic*"
+
+    # Test blockquote
+    assert convert_html_to_md("<blockquote>blockquote</blockquote>") == ">>> blockquote"
+
+    # Test code
+    assert convert_html_to_md("<code>code</code>") == "`code`"
+
+    # Test strikethrough
+    assert convert_html_to_md("<s>strikethrough</s>") == "~~strikethrough~~"
+
+    # Test link
+    assert convert_html_to_md('<a href="https://example.com">link</a>') == "[link](https://example.com)"
+
+    # Test pre code
+    assert convert_html_to_md("<pre><code>pre code</code></pre>") == "``pre code``"
+
+    # Test strong
+    assert convert_html_to_md("<strong>strong</strong>") == "**strong**"
+
+    # Test multiple tags
+    assert (
+        convert_html_to_md(
+            '<b>bold</b> <i>italic</i> <a href="https://example.com">link</a> <code>code</code> <s>strikethrough</s>'
+        )
+        == "**bold** *italic* [link](https://example.com) `code` ~~strikethrough~~"
+    )
+
+    # Test removing all other tags
+    assert convert_html_to_md("<p>paragraph</p>") == "paragraph"
+    assert convert_html_to_md("<p>paragraph</p><p>paragraph</p>") == "paragraphparagraph"
+
+    # Test <br> tags
+    assert (
+        convert_html_to_md("<p>paragraph<br>paragraph</p>")
+        == """paragraph
+paragraph"""
+    )
+
+    # Test removing trailing newline
+    assert convert_html_to_md("paragraph ") == "paragraph"
+
+    # Test removing leading and trailing whitespace
+    assert convert_html_to_md(" paragraph ") == "paragraph"
+
+    # Test removing leading and trailing whitespace and trailing newline
+    assert (
+        convert_html_to_md(
+            """ paragraph
+                              
+                                """  # noqa: W293
+        )
+        == "paragraph"
+    )