test/api: Add functionality to install particular CAS version

Signed-off-by: Rafal Stefanowski <rafal.stefanowski@intel.com>

test/functional/api/cas/installer.py

@@ -1,5 +1,5 @@
 #
-# Copyright(c) 2019-2021 Intel Corporation
+# Copyright(c) 2019-2022 Intel Corporation
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
@@ -8,8 +8,8 @@ import logging
 
 from tests import conftest
 from core.test_run import TestRun
-from api.cas import git
+from api.cas import cas_module, git
-from api.cas import cas_module
+from api.cas.version import get_installed_cas_version
 from test_utils import os_utils
 from test_utils.output import CmdException
 
@@ -48,24 +48,27 @@ def install_opencas():
         f"cd {TestRun.usr.working_dir} && "
         f"make install")
     if output.exit_code != 0:
-        raise CmdException("Error while installing Open CAS", output)
+        raise CmdException("Failed to install Open CAS", output)
+
+    output = TestRun.executor.run("rmmod cas_cache cas_disk; modprobe cas_cache")
+    if output.exit_code != 0:
+        raise CmdException("Failed to reload modules", output)
 
     TestRun.LOGGER.info("Check if casadm is properly installed.")
     output = TestRun.executor.run("casadm -V")
     if output.exit_code != 0:
         raise CmdException("'casadm -V' command returned an error", output)
-    else:
+
     TestRun.LOGGER.info(output.stdout)
 
 
-def set_up_opencas(version=None):
+def set_up_opencas(version: str = ""):
     _clean_opencas_repo()
 
     if version:
         git.checkout_cas_version(version)
 
     build_opencas()
-
     install_opencas()
 
 
@@ -82,20 +85,35 @@ def uninstall_opencas():
             raise CmdException("There was an error during uninstall process", output)
 
 
-def reinstall_opencas(version=None):
+def reinstall_opencas(version: str = ""):
     if check_if_installed():
         uninstall_opencas()
     set_up_opencas(version)
 
 
-def check_if_installed():
+def check_if_installed(version: str = ""):
-    TestRun.LOGGER.info("Check if Open-CAS-Linux is installed")
+    TestRun.LOGGER.info("Check if Open CAS Linux is installed")
     output = TestRun.executor.run("which casadm")
     modules_loaded = os_utils.is_kernel_module_loaded(cas_module.CasModule.cache.value)
 
-    if output.exit_code == 0 and modules_loaded:
+    if output.exit_code != 0 or not modules_loaded:
+        TestRun.LOGGER.info("CAS is not installed")
+        return False
+
     TestRun.LOGGER.info("CAS is installed")
 
-        return True
+    if version:
-    TestRun.LOGGER.info("CAS not installed")
+        TestRun.LOGGER.info(f"Check for requested CAS version: {version}")
+        cas_commit_expected = git.get_commit_hash(version)
+        cas_commit_installed = get_installed_cas_version()
+
+        if cas_commit_expected != cas_commit_installed:
+            TestRun.LOGGER.info(
+                f"CAS version '{version}' is not installed. "
+                f"Installed version found: {cas_commit_installed}"
+            )
             return False
+
+        TestRun.LOGGER.info(f"CAS version '{version}' is installed")
+
+    return True

test/functional/api/cas/version.py

@@ -1,11 +1,13 @@
 #
-# Copyright(c) 2019-2021 Intel Corporation
+# Copyright(c) 2019-2022 Intel Corporation
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
 import re
 
 from api.cas import git
+from core.test_run import TestRun
+from test_utils.output import CmdException
 
 
 class CasVersion:
@@ -43,3 +45,15 @@ def get_available_cas_versions():
     versions = [CasVersion.from_git_tag(tag) for tag in release_tags]
 
     return versions
+
+
+def get_installed_cas_version():
+    output = TestRun.executor.run("grep -i '^LAST_COMMIT_HASH=' /var/lib/opencas/cas_version")
+    if output.exit_code != 0:
+        raise CmdException(
+            "Could not find commit hash of installed version. "
+            "Check if Open CAS Linux is properly installed.",
+            output,
+        )
+
+    return output.stdout.split("=")[1]