tests: Add basic unit tests for inventory plugin

Add a test file for the inventory plugin with some basic unit tests.
This file can be used to add more tests in the future.

Signed-off-by: Felix Matouschek <fmatouschek@redhat.com>

tests/unit/plugins/inventory/test_kubevirt.py

@@ -0,0 +1,52 @@
+# -*- coding: utf-8 -*-
+# Copyright 2024 Red Hat, Inc.
+# GNU General Public License v3.0+ (see LICENSE or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import absolute_import, division, print_function
+
+__metaclass__ = type
+
+import pytest
+
+from ansible_collections.kubevirt.core.plugins.inventory.kubevirt import InventoryModule
+
+
+@pytest.fixture
+def inventory():
+    return InventoryModule()
+
+
+@pytest.mark.parametrize(
+    "file_name,expected",
+    [
+        ("inventory.kubevirt.yml", True),
+        ("inventory.kubevirt.yaml", True),
+        ("something.kubevirt.yml", True),
+        ("something.kubevirt.yaml", True),
+        ("inventory.somethingelse.yml", False),
+        ("inventory.somethingelse.yaml", False),
+        ("something.somethingelse.yml", False),
+        ("something.somethingelse.yaml", False),
+    ],
+)
+def test_verify_file(tmp_path, inventory, file_name, expected):
+    file = tmp_path / file_name
+    file.touch()
+    assert inventory.verify_file(str(file)) is expected
+
+
+@pytest.mark.parametrize(
+    "file_name",
+    [
+        "inventory.kubevirt.yml",
+        "inventory.kubevirt.yaml",
+        "something.kubevirt.yml",
+        "something.kubevirt.yaml",
+        "inventory.somethingelse.yml",
+        "inventory.somethingelse.yaml",
+        "something.somethingelse.yml",
+        "something.somethingelse.yaml",
+    ],
+)
+def test_verify_file_bad_config(inventory, file_name):
+    assert inventory.verify_file(file_name) is False