Update tests for Linux kernel module scan plugin

Signed-off-by: OctavioValdiviaMendoza <octavio.valdiviamendoza@sjsu.edu>

Author: OctavioValdiviaMendoza

tests/packagedcode/test_lkm.py

@@ -0,0 +1,127 @@
+#
+# Copyright (c) nexB Inc. and others. All rights reserved.
+# ScanCode is a trademark of nexB Inc.
+# SPDX-License-Identifier: Apache-2.0
+# See http://www.apache.org/licenses/LICENSE-2.0 for the license text.
+# See https://github.com/nexB/scancode-toolkit for support or download.
+# See https://aboutcode.org for more information about nexB OSS projects.
+#
+
+import json
+from pathlib import Path
+
+from scancode import plugin_lkm
+from scancode.cli_test_utils import run_scan_click
+
+
+class TestLinuxKernelModuleScanner:
+
+    test_data_dir = (
+        Path(__file__).resolve().parents[2]
+        / 'tests'
+        / 'licensedcode'
+        / 'data'
+        / 'query'
+    )
+
+    def test_extract_modinfo(self):
+        test_file = self.test_data_dir / 'eeepc_acpi.ko'
+
+        metadata = plugin_lkm.extract_modinfo(str(test_file))
+
+        assert 'license' in metadata
+        assert 'description' in metadata
+        assert 'author' in metadata
+
+    def test_get_dependency_names(self):
+        metadata = {
+            'depends': [
+                'usbcore,cfg80211,mac80211',
+            ]
+        }
+
+        result = plugin_lkm.get_dependency_names(metadata)
+
+        assert result == [
+            'usbcore',
+            'cfg80211',
+            'mac80211',
+        ]
+
+    def test_get_dependency_names_handles_multiple_entries(self):
+        metadata = {
+            'depends': [
+                'usbcore,cfg80211',
+                'mac80211,netdev',
+            ]
+        }
+
+        result = plugin_lkm.get_dependency_names(metadata)
+
+        assert result == [
+            'usbcore',
+            'cfg80211',
+            'mac80211',
+            'netdev',
+        ]
+
+    def test_scan_unrelated_file_returns_empty_mapping(self):
+        test_file = self.test_data_dir / 'apache-2.0.LICENSE'
+
+        result = plugin_lkm.scan_linux_kernel_module(str(test_file))
+
+        assert result == {}
+
+    def test_scan_invalid_lkm_returns_empty_mapping(self, tmp_path):
+        test_file = tmp_path / 'fake.ko'
+        test_file.write_bytes(b'not an elf file')
+
+        result = plugin_lkm.scan_linux_kernel_module(str(test_file))
+
+        assert result == {}
+
+    def test_scan_linux_kernel_module(self):
+        test_file = self.test_data_dir / 'eeepc_acpi.ko'
+
+        result = plugin_lkm.scan_linux_kernel_module(str(test_file))
+
+        assert list(result) == ['linux_kernel_module']
+
+        metadata = result['linux_kernel_module']
+        assert metadata['license'] == ['GPL']
+        assert metadata['description'] == ['Asus EeePC Hotkey Driver']
+        assert metadata['author'] == [
+            'Julien Lerouge, Karol Kozimor, Eric Cooper',
+        ]
+        assert metadata['depends'] == []
+        assert metadata['srcversion'] == ['7FD8A46D43685ADB0819A28']
+        assert metadata['vermagic'] == [
+            '2.6.24-19-generic SMP mod_unload 586 ',
+        ]
+
+    def test_plugin_supplies_file_scanner(self):
+        scanner = plugin_lkm.LinuxKernelModuleScanner()
+
+        assert scanner.get_scanner() is plugin_lkm.scan_linux_kernel_module
+        assert scanner.is_enabled(lkm=True)
+        assert not scanner.is_enabled(lkm=False)
+        assert list(scanner.resource_attributes) == ['linux_kernel_module']
+
+    def test_lkm_scan_adds_file_metadata_without_package_data(self, tmp_path):
+        test_file = self.test_data_dir / 'eeepc_acpi.ko'
+        result_file = tmp_path / 'lkm-scan.json'
+
+        run_scan_click([
+            '--lkm',
+            '--json-pp',
+            str(result_file),
+            str(test_file),
+        ])
+
+        with result_file.open(encoding='utf-8') as results:
+            scanned_file = json.load(results)['files'][0]
+
+        metadata = scanned_file['linux_kernel_module']
+        assert metadata['license'] == ['GPL']
+        assert metadata['depends'] == []
+        assert 'package_data' not in scanned_file