pmb.parse.arguments: add zap --all flag (MR 2117)

Fixes: #1692

test/test_arguments.py

@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+import argparse
+
+import pytest
+
+from pmb.parse.arguments import toggle_other_boolean_flags
+
+
+@pytest.fixture
+def example_cli_with_flags():
+    parser = argparse.ArgumentParser(prog="sample cli")
+    parser.add_argument("-f1", "--flag1", action="store_true")
+    parser.add_argument("-f2", "--flag2", action="store_true")
+    return parser
+
+
+def test_toggle_other_boolean_flags(example_cli_with_flags):
+    other_flags = ["flag1", "flag2"]
+    example_cli_with_flags.add_argument(
+        "-f12", "--flag12",
+        action=toggle_other_boolean_flags(*other_flags))
+    args = example_cli_with_flags.parse_args(['-f12'])
+
+    expected_flags_true = other_flags + ["flag12"]
+    for flag in expected_flags_true:
+        assert getattr(args, flag)