Add more tests for PlaylistDownloader functionality

tests/test_cli_update_and_logging.py

@@ -0,0 +1,42 @@
+import logging
+import subprocess
+from types import SimpleNamespace
+
+import ytplaylist.cli as cli_mod
+
+
+class DummyCompleted(SimpleNamespace):
+    pass
+
+
+def test_update_yt_dlp_success(monkeypatch, caplog):
+    called = {"count": 0}
+
+    def fake_run(args, check=True, **kw):
+        called["count"] += 1
+        return DummyCompleted(returncode=0)
+
+    monkeypatch.setattr(subprocess, "run", fake_run)
+
+    caplog.set_level(logging.INFO)
+    cli_mod.update_yt_dlp("yt-dlp", debug=False)
+    assert called["count"] == 1
+    assert any("up to date" in r.message.lower() for r in caplog.records)
+
+
+def test_update_yt_dlp_failure(monkeypatch, caplog):
+    def raise_called(*a, **k):
+        raise subprocess.CalledProcessError(1, cmd=a[0])
+
+    monkeypatch.setattr(subprocess, "run", raise_called)
+    caplog.set_level(logging.WARNING)
+    cli_mod.update_yt_dlp("yt-dlp", debug=False)
+    assert any("could not update yt-dlp" in r.message.lower() or "could not update" in r.message.lower() for r in caplog.records)
+
+
+def test_configure_logging_sets_levels():
+    # ensure calling configure_logging flips global root logger level
+    cli_mod.configure_logging(True)
+    assert logging.getLogger().level == logging.DEBUG
+    cli_mod.configure_logging(False)
+    assert logging.getLogger().level == logging.INFO