Add more testing of clicking on links

tests/test_markdownviewer.md

@@ -1,6 +1,6 @@
 * [First](test_markdownviewer.md#first)
-* [Second](test_markdownviewer.md#second)
-* [Third](test_markdownviewer.md#third)
+* [Second](#second)
+* [Third](./test_markdownviewer.md#third)
 
 # First
 

tests/test_markdownviewer.py

@@ -1,5 +1,7 @@
 from pathlib import Path
 
+import pytest
+
 from textual.app import App, ComposeResult
 from textual.geometry import Offset
 from textual.widgets import Markdown, MarkdownViewer
@@ -14,10 +16,11 @@ class MarkdownViewerApp(App[None]):
         await self.query_one(MarkdownViewer).go(Path(__file__).with_suffix(".md"))
 
 
-async def test_markdown_viewer_anchor_link() -> None:
+@pytest.mark.parametrize("link", [0, 1, 2])
+async def test_markdown_viewer_anchor_link(link: int) -> None:
     """Test https://github.com/Textualize/textual/issues/3094"""
     async with MarkdownViewerApp().run_test() as pilot:
         # There's not really anything to test *for* here, but the lack of an
         # exception is the win (before the fix this is testing it would have
         # been FileNotFoundError).
-        await pilot.click(Markdown, Offset(2, 1))
+        await pilot.click(Markdown, Offset(2, link))