Added test for littlejs filter

tests/unit/roles/web-app-littlejs/filter_plugins/test_littlejs.py

@@ -0,0 +1,66 @@
+import unittest
+import importlib.util
+from pathlib import Path
+
+
+def _load_littlejs_module():
+    """
+    Load the littlejs filter plugin directly from the roles path.
+    Works even with hyphens in directory names.
+    """
+    here = Path(__file__).resolve()
+    plugin_path = (
+        here.parents[5]
+        / "roles"
+        / "web-app-littlejs"
+        / "filter_plugins"
+        / "littlejs.py"
+    )
+
+    spec = importlib.util.spec_from_file_location("littlejs_filter", plugin_path)
+    module = importlib.util.module_from_spec(spec)
+    assert spec.loader is not None
+    spec.loader.exec_module(module)
+    return module
+
+
+class TestLittlejsHref(unittest.TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        module = _load_littlejs_module()
+        # Store original function; we will always access it via type(self)
+        cls._littlejs_href = module.littlejs_href
+
+    def test_returns_hash_if_no_file(self):
+        href = type(self)._littlejs_href({}, "https", "littlejs.example.com")
+        self.assertEqual(href, "#")
+
+    def test_full_example_project(self):
+        example = {"file": "starter", "is_project": True}
+        href = type(self)._littlejs_href(example, "https", "littlejs.example.com")
+        self.assertEqual(
+            href,
+            "https://littlejs.example.com/examples/starter/"
+        )
+
+    def test_short_example_uses_runner(self):
+        # no is_project → False by default
+        example = {"file": "clock.js"}
+        href = type(self)._littlejs_href(example, "https", "littlejs.example.com")
+        self.assertEqual(
+            href,
+            "https://littlejs.example.com/examples/shorts/run.html?file=clock.js"
+        )
+
+    def test_respects_protocol_and_domain(self):
+        example = {"file": "platformer", "is_project": True}
+        href = type(self)._littlejs_href(example, "http", "littlejs.infinito.nexus")
+        self.assertEqual(
+            href,
+            "http://littlejs.infinito.nexus/examples/platformer/"
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()