selftests: tc-testing: add "depends_on" property to skip tests

currently, users can skip individual test cases by means of writing

  "skip": "yes"

in the scenario file. Extend this functionality, introducing 'dependsOn':
it's optional property like "skip", but the value contains a command (for
example, a probe on iproute2 to check if it supports a specific feature).
If such property is present, tdc executes that command and skips the test
when the return value is non-zero.

Reviewed-by: Pedro Tammela <pctammela@mojatatu.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/tools/testing/selftests/tc-testing/tdc.py b/tools/testing/selftests/tc-testing/tdc.py
index 7bd94f8e490a..b98256f38447 100755
--- a/tools/testing/selftests/tc-testing/tdc.py
+++ b/tools/testing/selftests/tc-testing/tdc.py
@@ -369,6 +369,19 @@ def run_one_test(pm, args, index, tidx):
             pm.call_post_execute()
             return res
 
+    if 'dependsOn' in tidx:
+        if (args.verbose > 0):
+            print('probe command for test skip')
+        (p, procout) = exec_cmd(args, pm, 'execute', tidx['dependsOn'])
+        if p:
+            if (p.returncode != 0):
+                res = TestResult(tidx['id'], tidx['name'])
+                res.set_result(ResultState.skip)
+                res.set_errormsg('probe command: test skipped.')
+                pm.call_pre_case(tidx, test_skip=True)
+                pm.call_post_execute()
+                return res
+
     # populate NAMES with TESTID for this test
     NAMES['TESTID'] = tidx['id']