WIP: add unit tests

Author: vkarak

unittests/test_cli.py

@@ -1374,12 +1374,6 @@ def test_session_annotations(run_reframe):
 
 
 def test_performance_compare(run_reframe, table_format):
-    def assert_no_crash(returncode, stdout, stderr, exitcode=0):
-        assert returncode == exitcode
-        assert 'Traceback' not in stdout
-        assert 'Traceback' not in stderr
-        return returncode, stdout, stderr
-
     run_reframe2 = functools.partial(
         run_reframe,
         checkpath=['unittests/resources/checks/frontend_checks.py'],
@@ -1407,3 +1401,7 @@ def assert_no_crash(returncode, stdout, stderr, exitcode=0):
             action='--performance-compare=now-1m:now/now-1d:now/mean:+foo/+bar'
         ), exitcode=1
     )
+
+
+def test_import_from_perflog(run_reframe):
+    pass