Add allow list for non-executed test cases

The allow list explicits which test cases are allowed to not be
executed when testing. This may be, for example, because a feature
is yet to be developed but the test for that feature is already in
our code base.

Signed-off-by: Tomás González <tomasagustin.gonzalezorlando@arm.com>
diff --git a/tests/scripts/analyze_outcomes.py b/tests/scripts/analyze_outcomes.py
index c6891bb..fde0715 100755
--- a/tests/scripts/analyze_outcomes.py
+++ b/tests/scripts/analyze_outcomes.py
@@ -73,15 +73,18 @@
         Results.log("Error: failed to run reference/driver components")
         sys.exit(ret_val)
 
-def analyze_coverage(results, outcomes):
+def analyze_coverage(results, outcomes, allow_list):
     """Check that all available test cases are executed at least once."""
     available = check_test_cases.collect_available_test_cases()
     for key in available:
         hits = outcomes[key].hits() if key in outcomes else 0
-        if hits == 0:
+        if hits == 0 and key not in allow_list:
             # Make this a warning, not an error, as long as we haven't
             # fixed this branch to have full coverage of test cases.
             results.warning('Test case not executed: {}', key)
+        elif hits != 0 and key in allow_list:
+            # Test Case should be removed from the allow list.
+            results.warning('Allow listed test case was executed: {}', key)
 
 def analyze_driver_vs_reference(outcomes, component_ref, component_driver,
                                 ignored_suites, ignored_test=None):
@@ -122,10 +125,10 @@
             result = False
     return result
 
-def analyze_outcomes(outcomes):
+def analyze_outcomes(outcomes, allow_list):
     """Run all analyses on the given outcome collection."""
     results = Results()
-    analyze_coverage(results, outcomes)
+    analyze_coverage(results, outcomes, allow_list)
     return results
 
 def read_outcome_file(outcome_file):
@@ -151,10 +154,9 @@
 
 def do_analyze_coverage(outcome_file, args):
     """Perform coverage analysis."""
-    del args # unused
     outcomes = read_outcome_file(outcome_file)
     Results.log("\n*** Analyze coverage ***\n")
-    results = analyze_outcomes(outcomes)
+    results = analyze_outcomes(outcomes, args['allow_list'])
     return results.error_count == 0
 
 def do_analyze_driver_vs_reference(outcome_file, args):
@@ -175,7 +177,9 @@
 TASKS = {
     'analyze_coverage':                 {
         'test_function': do_analyze_coverage,
-        'args': {}
+        'args': {
+            'allow_list': [],
+        }
         },
     # There are 2 options to use analyze_driver_vs_reference_xxx locally:
     # 1. Run tests and then analysis: