diff --git a/pelican/tests/test_theme.py b/pelican/tests/test_theme.py
new file mode 100644
index 000000000..0070078a9
--- /dev/null
+++ b/pelican/tests/test_theme.py
@@ -0,0 +1,138 @@
+import os
+import unittest
+from shutil import rmtree
+from tempfile import mkdtemp
+
+from pelican import Pelican
+from pelican.settings import read_settings
+from pelican.tests.support import LoggedTestCase, mute
+
+CURRENT_DIR = os.path.dirname(os.path.abspath(__file__))
+CONTENT_DIR = os.path.join(CURRENT_DIR, "simple_content")
+
+
+class TestTemplateInheritance(LoggedTestCase):
+ def setUp(self):
+ super().setUp()
+ self.temp_output = mkdtemp(prefix="pelican_test_output.")
+ self.temp_theme = mkdtemp(prefix="pelican_test_theme.")
+ self.temp_cache = mkdtemp(prefix="pelican_test_cache.")
+
+ # Create test theme directory structure
+ os.makedirs(os.path.join(self.temp_theme, "templates"), exist_ok=True)
+
+ # Create base.html template that inherits from simple theme
+ template_content = """{% extends "!simple/base.html" %}
+
+{% block head %}
+{{ super() }}
+
+{% endblock %}
+
+{% block footer %}
+ New footer
+{% endblock %}
+"""
+
+ with open(os.path.join(self.temp_theme, "templates", "base.html"), "w") as f:
+ f.write(template_content)
+
+ def tearDown(self):
+ """Clean up temporary directories and files"""
+ for path in [self.temp_output, self.temp_theme, self.temp_cache]:
+ if os.path.exists(path):
+ rmtree(path)
+
+ super().tearDown()
+
+ def test_simple_theme(self):
+ """Test that when a template is missing from our theme, Pelican falls back
+ to using the template from the simple theme."""
+
+ settings = read_settings(
+ path=None,
+ override={
+ "THEME": "simple",
+ "PATH": CONTENT_DIR,
+ "OUTPUT_PATH": self.temp_output,
+ "CACHE_PATH": self.temp_cache,
+ "SITEURL": "http://example.com",
+ # Disable unnecessary output that might cause failures
+ "ARCHIVES_SAVE_AS": "",
+ "CATEGORIES_SAVE_AS": "",
+ "TAGS_SAVE_AS": "",
+ "AUTHOR_SAVE_AS": "",
+ "AUTHORS_SAVE_AS": "",
+ },
+ )
+
+ pelican = Pelican(settings=settings)
+ mute(True)(pelican.run)()
+
+ output_file = os.path.join(self.temp_output, "test-md-file.html")
+ self.assertTrue(os.path.exists(output_file))
+
+ with open(output_file) as f:
+ content = f.read()
+
+ # Verify file content is present
+ self.assertIn("Test md File", content)
+
+ # Verify simple theme content is present
+ self.assertIn('', content)
+ self.assertIn("Proudly powered by", content)
+
+ # Verify our custom theme additions are NOT present
+ # (since we should be using the simple theme's template directly)
+ self.assertNotIn(
+ '', content) # From simple theme
+
+ # Verify super() maintained original head content
+ self.assertIn('
-
- {% if SITESUBTITLE %}{{ SITESUBTITLE }}
{% endif %}
-
-
-
- {% block content %}
- {% endblock %}
-
-
+ {% block body %}
+
+ {% block header %}
+ {% if SITESUBTITLE %}{{ SITESUBTITLE }}
{% endif %}
+ {% endblock header %}
+ {% block nav %}
+
+ {% endblock nav %}
+
+
+ {% block content %}
+ {% endblock content %}
+
+
+ {% endblock body %}