Tests: Add system tests for groupadd in test_groupadd.py

tests/system/tests/test_groupadd.py

@@ -340,3 +340,83 @@ def test_groupadd__locked_file(shadow: Shadow, lock_file: str):
     if shadow.host.features["gshadow"]:
         gshadow_entry = shadow.tools.getent.gshadow("tgroup")
         assert gshadow_entry is None, "Group should not be found"
+
+
+@pytest.mark.topology(KnownTopology.Shadow)
+@pytest.mark.parametrize(
+    "key",
+    [
+        pytest.param("KEY=100", id="invalid_key"),
+        pytest.param("GID_MAX", id="no_equals_sign"),
+    ],
+)
+def test_groupadd__invalid_key(shadow: Shadow, key: str):
+    """
+    :title: Group creation with invalid key fails
+    :setup:
+        1. None required
+    :steps:
+        1. Create group with invalid key
+        2. Verify that groupadd command fails
+        3. Check group and gshadow entries
+    :expectedresults:
+        1. Group is not created
+        2. groupadd command fails with error (invalid argument)
+        3. No group or gshadow entries are found
+    :customerscenario: False
+    """
+    with pytest.raises(ProcessError) as exc_info:
+        shadow.groupadd(f"-K {key} tgroup")
+
+    assert exc_info.value.rc == 3, f"Expected return code 3 (invalid argument), got {exc_info.value.rc}"
+
+    group_entry = shadow.tools.getent.group("tgroup")
+    assert group_entry is None, "Group should not be found"
+
+    if shadow.host.features["gshadow"]:
+        gshadow_entry = shadow.tools.getent.gshadow("tgroup")
+        assert gshadow_entry is None, "Group should not be found"
+
+
+@pytest.mark.topology(KnownTopology.Shadow)
+def test_groupadd__existing_group(shadow: Shadow):
+    """
+    :title: Group creation fails when group already exists
+    :setup:
+        1. Create group
+    :steps:
+        1. Check existing group and gshadow entries
+        2. Attempt to create group
+        3. Verify that groupadd command fails
+        4. Check existing group and gshadow entries
+    :expectedresults:
+        1. Existing group and gshadow entries are found
+        2. Group is not created
+        3. groupadd command fails with error (group already exists)
+        4. Existing group and gshadow entries are still found
+    :customerscenario: False
+    """
+    shadow.groupadd("tgroup")
+
+    existing_group_entry = shadow.tools.getent.group("tgroup")
+    assert existing_group_entry is not None, "Group should be found"
+    assert existing_group_entry.name == "tgroup", "Incorrect groupname"
+
+    if shadow.host.features["gshadow"]:
+        existing_gshadow_entry = shadow.tools.getent.gshadow("tgroup")
+        assert existing_gshadow_entry is not None, "Group should be found"
+        assert existing_gshadow_entry.name == "tgroup", "Incorrect groupname"
+
+    with pytest.raises(ProcessError) as exc_info:
+        shadow.groupadd("tgroup")
+
+    assert exc_info.value.rc == 9, f"Expected return code 9 (group already exists), got {exc_info.value.rc}"
+
+    existing_group_entry = shadow.tools.getent.group("tgroup")
+    assert existing_group_entry is not None, "Group should be found"
+    assert existing_group_entry.name == "tgroup", "Incorrect groupname"
+
+    if shadow.host.features["gshadow"]:
+        existing_gshadow_entry = shadow.tools.getent.gshadow("tgroup")
+        assert existing_gshadow_entry is not None, "Group should be found"
+        assert existing_gshadow_entry.name == "tgroup", "Incorrect groupname"