1 files changed, 69 insertions, 0 deletions
diff --git a/tst/test_help.py b/tst/test_help.py
new file mode 100644
index 0000000..429d7c4
--- /dev/null
+++ b/tst/test_help.py
@@ -0,0 +1,69 @@
+# Tests for CLI help formatting
+# Copyright (C) 2025  Nguyễn Gia Phong
+#
+# This file is part of scadere.
+#
+# Scadere is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published
+# by the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Scadere is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with scadere.  If not, see <https://www.gnu.org/licenses/>.
+
+from contextlib import redirect_stdout, suppress
+from io import StringIO
+
+from hypothesis import given
+from pytest import fixture, mark, raises
+
+from scadere import NetLoc
+from scadere.check import main as check
+from scadere.listen import main as listen
+
+
+@fixture(scope='session')
+def help_string(request):
+    string = StringIO()
+    with suppress(SystemExit), redirect_stdout(string):
+        request.param(['--help'])
+    return string.getvalue()
+
+
+@mark.parametrize('help_string', [check, listen], indirect=True)
+def test_usage_prefix(help_string):
+    assert help_string.startswith('Usage: ')
+
+
+@mark.parametrize('help_string', [check, listen], indirect=True)
+def test_options_heading(help_string):
+    assert '\n\nOptions:\n' in help_string
+
+
+@mark.parametrize('help_string', [check], indirect=True)
+def test_one_or_more(help_string):
+    assert ' HOST[:PORT]...\n' in help_string
+
+
+@mark.parametrize('help_string', [check], indirect=True)
+@mark.parametrize('short,long,metavar', [('-d', '--days', 'DAYS'),
+                                         ('-o', '--output', 'PATH')])
+def test_long_option(help_string, short, long, metavar):
+    assert f'{short} {metavar}, {long}={metavar}' in help_string
+
+
+@given(...)
+def test_netloc(hostname: str, port: int | None, default_port: int | None):
+    netloc = NetLoc(default_port)
+    if port is not None:
+        assert netloc(f'{hostname}:{port}') == (hostname, port)
+    elif default_port is None:
+        with raises(ValueError):
+            netloc(f'{hostname}:{port}')
+    else:
+        assert netloc(hostname) == (hostname, default_port)