1 files changed, 139 insertions, 0 deletions
diff --git a/tests/meta_hooks/check_useless_excludes_test.py b/tests/meta_hooks/check_useless_excludes_test.py
new file mode 100644
index 0000000..15b68b4
--- /dev/null
+++ b/tests/meta_hooks/check_useless_excludes_test.py
@@ -0,0 +1,139 @@
+from __future__ import annotations
+
+from pre_commit import git
+from pre_commit.meta_hooks import check_useless_excludes
+from pre_commit.util import cmd_output
+from testing.fixtures import add_config_to_repo
+from testing.fixtures import make_config_from_repo
+from testing.fixtures import make_repo
+from testing.util import xfailif_windows
+
+
+def test_useless_exclude_global(capsys, in_git_dir):
+    config = {
+        'exclude': 'foo',
+        'repos': [
+            {
+                'repo': 'meta',
+                'hooks': [{'id': 'check-useless-excludes'}],
+            },
+        ],
+    }
+
+    add_config_to_repo(in_git_dir.strpath, config)
+
+    assert check_useless_excludes.main(()) == 1
+
+    out, _ = capsys.readouterr()
+    out = out.strip()
+    assert "The global exclude pattern 'foo' does not match any files" == out
+
+
+def test_useless_exclude_for_hook(capsys, in_git_dir):
+    config = {
+        'repos': [
+            {
+                'repo': 'meta',
+                'hooks': [{'id': 'check-useless-excludes', 'exclude': 'foo'}],
+            },
+        ],
+    }
+
+    add_config_to_repo(in_git_dir.strpath, config)
+
+    assert check_useless_excludes.main(()) == 1
+
+    out, _ = capsys.readouterr()
+    out = out.strip()
+    expected = (
+        "The exclude pattern 'foo' for check-useless-excludes "
+        'does not match any files'
+    )
+    assert expected == out
+
+
+def test_useless_exclude_with_types_filter(capsys, in_git_dir):
+    config = {
+        'repos': [
+            {
+                'repo': 'meta',
+                'hooks': [
+                    {
+                        'id': 'check-useless-excludes',
+                        'exclude': '.pre-commit-config.yaml',
+                        'types': ['python'],
+                    },
+                ],
+            },
+        ],
+    }
+
+    add_config_to_repo(in_git_dir.strpath, config)
+
+    assert check_useless_excludes.main(()) == 1
+
+    out, _ = capsys.readouterr()
+    out = out.strip()
+    expected = (
+        "The exclude pattern '.pre-commit-config.yaml' for "
+        'check-useless-excludes does not match any files'
+    )
+    assert expected == out
+
+
+def test_no_excludes(capsys, in_git_dir):
+    config = {
+        'repos': [
+            {
+                'repo': 'meta',
+                'hooks': [{'id': 'check-useless-excludes'}],
+            },
+        ],
+    }
+
+    add_config_to_repo(in_git_dir.strpath, config)
+
+    assert check_useless_excludes.main(()) == 0
+
+    out, _ = capsys.readouterr()
+    assert out == ''
+
+
+def test_valid_exclude(capsys, in_git_dir):
+    config = {
+        'repos': [
+            {
+                'repo': 'meta',
+                'hooks': [
+                    {
+                        'id': 'check-useless-excludes',
+                        'exclude': '.pre-commit-config.yaml',
+                    },
+                ],
+            },
+        ],
+    }
+
+    add_config_to_repo(in_git_dir.strpath, config)
+
+    assert check_useless_excludes.main(()) == 0
+
+    out, _ = capsys.readouterr()
+    assert out == ''
+
+
+@xfailif_windows  # pragma: win32 no cover
+def test_useless_excludes_broken_symlink(capsys, in_git_dir, tempdir_factory):
+    path = make_repo(tempdir_factory, 'script_hooks_repo')
+    config = make_config_from_repo(path)
+    config['hooks'][0]['exclude'] = 'broken-symlink'
+    add_config_to_repo(in_git_dir.strpath, config)
+
+    in_git_dir.join('broken-symlink').mksymlinkto('DNE')
+    cmd_output('git', 'add', 'broken-symlink')
+    git.commit()
+
+    assert check_useless_excludes.main(('.pre-commit-config.yaml',)) == 0
+
+    out, _ = capsys.readouterr()
+    assert out == ''