1 files changed, 43 insertions, 0 deletions
diff --git a/tests/check_vcs_permalinks_test.py b/tests/check_vcs_permalinks_test.py
new file mode 100644
index 0000000..01ce94d
--- /dev/null
+++ b/tests/check_vcs_permalinks_test.py
@@ -0,0 +1,43 @@
+from __future__ import annotations
+
+from pre_commit_hooks.check_vcs_permalinks import main
+
+
+def test_trivial(tmpdir):
+    f = tmpdir.join('f.txt').ensure()
+    assert not main((str(f),))
+
+
+def test_passing(tmpdir):
+    f = tmpdir.join('f.txt')
+    f.write_binary(
+        # permalinks are ok
+        b'https://github.com/asottile/test/blob/649e6/foo%20bar#L1\n'
+        # tags are ok
+        b'https://github.com/asottile/test/blob/1.0.0/foo%20bar#L1\n'
+        # links to files but not line numbers are ok
+        b'https://github.com/asottile/test/blob/master/foo%20bar\n'
+        # regression test for overly-greedy regex
+        b'https://github.com/ yes / no ? /blob/master/foo#L1\n',
+    )
+    assert not main((str(f),))
+
+
+def test_failing(tmpdir, capsys):
+    with tmpdir.as_cwd():
+        tmpdir.join('f.txt').write_binary(
+            b'https://github.com/asottile/test/blob/master/foo#L1\n'
+            b'https://example.com/asottile/test/blob/master/foo#L1\n'
+            b'https://example.com/asottile/test/blob/main/foo#L1\n',
+        )
+
+        assert main(('f.txt', '--additional-github-domain', 'example.com'))
+        out, _ = capsys.readouterr()
+        assert out == (
+            'f.txt:1:https://github.com/asottile/test/blob/master/foo#L1\n'
+            'f.txt:2:https://example.com/asottile/test/blob/master/foo#L1\n'
+            'f.txt:3:https://example.com/asottile/test/blob/main/foo#L1\n'
+            '\n'
+            'Non-permanent github link detected.\n'
+            'On any page on github press [y] to load a permalink.\n'
+        )