fix(agent): make sure phase exit codes are in the 0-255 range (#385)

* fix(agent): make sure phase exit codes are in the 0-255 range
* chore: add test to check for phase status after timeout

agent/testflinger_agent/job.py

@@ -120,6 +120,9 @@ def run_test_phase(self, phase, rundir):
             # Set exit_event to fail for this phase in case of an exception
             exit_event = f"{phase}_fail"
             exitcode, exit_event, exit_reason = runner.run(cmd)
+            # make sure the exit code is within the expected 0-255 range
+            # (this also handles negative numbers)
+            exitcode = exitcode % 256
         except Exception as exc:
             logger.exception(exc)
             exitcode = 100

agent/testflinger_agent/tests/test_agent.py

@@ -315,6 +315,32 @@ def test_phase_failed(self, agent, requests_mock):
         assert outcome_data.get("provision_status") == 1
         assert outcome_data.get("test_status") is None
 
+    def test_phase_timeout(self, agent, requests_mock):
+        # Make sure the status code of a timed-out phase is correct
+        self.config["test_command"] = "sleep 12"
+        mock_job_data = {
+            "job_id": str(uuid.uuid1()),
+            "job_queue": "test",
+            "output_timeout": 1,
+            "test_data": {"test_cmds": "foo"},
+        }
+        requests_mock.get(
+            rmock.ANY, [{"text": json.dumps(mock_job_data)}, {"text": "{}"}]
+        )
+        requests_mock.post(rmock.ANY, status_code=200)
+        with patch("shutil.rmtree"), patch("os.unlink"):
+            agent.process_jobs()
+        outcome_file = os.path.join(
+            os.path.join(
+                self.tmpdir,
+                mock_job_data.get("job_id"),
+                "testflinger-outcome.json",
+            )
+        )
+        with open(outcome_file) as f:
+            outcome_data = json.load(f)
+        assert outcome_data.get("test_status") == 247
+
     def test_retry_transmit(self, agent, requests_mock):
         # Make sure we retry sending test results
         self.config["provision_command"] = "/bin/false"