updated tests for readme generations

tests/renderers/mkdocs/test_mkdocs_content.py

@@ -17,3 +17,34 @@ def test_mkdocs_file_content(tmp_path: Path):
 
     assert "# Mod" in content
     assert "::: testpkg.mod" in content
+
+
+def test_generate_readme_source_root(tmp_path: Path):
+    project = Project("testpkg")
+
+    root = Module("testpkg")
+    root.docstring = "Test package documentation."
+
+    project.add_module(root)
+    project.add_module(Module("testpkg.mod"))
+
+    docs_dir = tmp_path / "docs"
+
+    renderer = MkDocsRenderer()
+
+    renderer.generate_sources(project, docs_dir)
+
+    renderer.generate_readme(
+        project,
+        docs_dir,
+        module_is_source=True,
+    )
+
+    readme = tmp_path / "README.md"
+
+    assert readme.exists()
+
+    content = readme.read_text()
+
+    assert "# testpkg" in content
+    assert "Test package documentation." in content