Add file URL RSS feed coverage

tests/test_file_feeds.py

@@ -0,0 +1,36 @@
+from pathlib import Path
+
+from repub import entrypoint as entrypoint_module
+
+
+def test_entrypoint_supports_file_feed_urls(tmp_path: Path, monkeypatch) -> None:
+    fixture_path = (
+        Path(__file__).resolve().parents[1] / "demo" / "fixtures" / "local-feed.rss"
+    ).resolve()
+    config_path = tmp_path / "repub.toml"
+    config_path.write_text(
+        f"""
+out_dir = "out"
+
+[[feeds]]
+name = "local-file"
+url = "{fixture_path.as_uri()}"
+
+[scrapy.settings]
+LOG_LEVEL = "ERROR"
+DOWNLOAD_TIMEOUT = 5
+""".strip()
+        + "\n",
+        encoding="utf-8",
+    )
+
+    monkeypatch.setattr(entrypoint_module, "check_runtime", lambda *_: True)
+
+    exit_code = entrypoint_module.entrypoint(["--config", str(config_path)])
+
+    output_path = tmp_path / "out" / "local-file.rss"
+    assert exit_code == 0
+    assert output_path.exists()
+    output = output_path.read_text(encoding="utf-8")
+    assert "<title>Local Demo Feed</title>" in output
+    assert "<title>Local Demo Entry</title>" in output