[tests] Isolate cleaner's cache accross tests

tests/cleaner_tests/basic_function_tests/report_with_mask.py

@@ -95,6 +95,9 @@ class ReportWithUserCustomisations(StageOneReportTest):
                'BOOT_IMAGE,fs.dentry-state --skip-cleaning-files '
                'proc/cmdline,sos_commands/*/sysctl* --no-update')
 
+    def pre_sos_setup(self):
+        self.setup_isolated_cleaner_cache()
+
     # Will the 'tmp' be properly treated in path to working dir without
     # raising an error?
     # To make this test effective, we assume the test runs on a system / with

tests/cleaner_tests/existing_archive.py

@@ -129,6 +129,9 @@ class ExistingArchiveCleanTmpTest(StageTwoReportTest):
                 tests/test_data/{ARCHIVE}.tar.xz'
     sos_component = 'clean'
 
+    def pre_sos_setup(self):
+        self.setup_isolated_cleaner_cache()
+
     def test_sys_tmp_not_obfuscated(self):
         """ Ensure that keywords avocado and ExistingArchiveCleanTmpTest
         remains in the final archive path despite they are parts of the

tests/cleaner_tests/full_report/full_report_run.py

@@ -22,16 +22,15 @@ class FullCleanTest(StageTwoReportTest):
 
     sos_cmd = '--clean'
     sos_timeout = 600
-    # replace with an empty placeholder, make sure that this test case is not
-    # influenced by previous clean runs
-    files = [('default_mapping', '/etc/sos/cleaner/default_mapping')]
     packages = {
         'rhel': ['python3-systemd'],
         'ubuntu': ['python3-systemd']
     }
     physical_or_vm_only = True
 
     def pre_sos_setup(self):
+        self.setup_isolated_cleaner_cache()
+
         # ensure that case-insensitive matching of FQDNs and shortnames work
         from systemd import journal
         from socket import gethostname

tests/cleaner_tests/ipv6_test/ipv6_test.py

@@ -22,12 +22,11 @@ class IPv6Test(StageTwoReportTest):
     install_plugins = ['ipv6']
     sos_cmd = '--clean -o ipv6'
     sos_timeout = 600
-    # replace default mapping to avoid being influenced by previous runs
     # place mock file with crafted address used by mocked plugin
-    files = [
-        ('default_mapping', '/etc/sos/cleaner/default_mapping'),
-        ('sos-test-ipv6.txt', MOCK_FILE)
-    ]
+    files = [('sos-test-ipv6.txt', MOCK_FILE)]
+
+    def pre_sos_setup(self):
+        self.setup_isolated_cleaner_cache()
 
     def test_valid_ipv6(self):
         self.assertFileCollected(MOCK_FILE)

tests/sos_tests.py

@@ -762,6 +762,21 @@ def get_plugin_manifest(self, plugin):
             raise Exception(f"Manifest for {plugin} not present")
         return self.manifest['components']['report']['plugins'][plugin]
 
+    def setup_isolated_cleaner_cache(self):
+        """Create an isolated mapping file in the test's tmpdir to ensure
+        each test run has its own cleaner_cache directory that doesn't
+        interfere with other test runs or the system's default cache.
+
+        This ensures cleaner_cache will be at {tmpdir}/cleaner_cache/
+        instead of /etc/sos/cleaner/cleaner_cache/
+        """
+        map_file = os.path.join(self.tmpdir, 'test_mapping')
+        # Create empty mapping file
+        with open(map_file, 'w', encoding='utf-8'):
+            pass
+        # Dynamically add --map-file to sos_cmd with the unique tmpdir path
+        self.sos_cmd += f' --map-file {map_file}'
+
 
 class StageOneReportTest(BaseSoSReportTest):
     """This is the test class to subclass for all Stage One (no mocking) tests