First commit

part2-logstats/tests/test_cli.py

@@ -0,0 +1,38 @@
+from logstats.cli import main
+
+
+def run(argv, capsys):
+    main(argv)
+    return capsys.readouterr().out.strip().splitlines()
+
+
+def test_reports_every_level_present_in_file(tmp_path, capsys):
+    log = tmp_path / "a.log"
+    log.write_text(
+        "2024-03-01 09:00:00 INFO started\n"
+        "2024-03-01 09:00:01 ERROR boom\n"
+        "2024-03-01 09:00:02 WARNING low disk\n"
+        "2024-03-01 09:00:03 DEBUG state dump\n"
+    )
+    out = run([str(log)], capsys)
+    assert len(out) == 4
+
+
+def test_same_file_gives_same_result_on_every_run(tmp_path, capsys):
+    log = tmp_path / "a.log"
+    log.write_text(
+        "2024-03-01 09:00:00 INFO started\n"
+        "2024-03-01 09:00:01 ERROR boom\n"
+    )
+    first = run([str(log)], capsys)
+    second = run([str(log)], capsys)
+    assert first == second
+
+
+def test_aggregates_across_multiple_files(tmp_path, capsys):
+    a = tmp_path / "a.log"
+    b = tmp_path / "b.log"
+    a.write_text("2024-03-01 09:00:00 INFO one\n")
+    b.write_text("2024-03-01 09:00:01 INFO two\n")
+    out = run([str(a), str(b)], capsys)
+    assert out == ["INFO     2"]