added test for feed generation

tests/test_blag.py

@@ -0,0 +1,18 @@
+from tempfile import TemporaryDirectory
+import os
+
+import pytest
+
+from blag import blag
+
+
+@pytest.fixture
+def outdir():
+    with TemporaryDirectory() as dir:
+        yield dir
+
+
+def test_generate_feed(outdir):
+    articles = []
+    blag.generate_feed(articles, outdir, ' ', ' ', ' ', ' ')
+    assert os.path.exists(f'{outdir}/atom.xml')