Bug 1605731 - Fix assertion in mach formatter with multiple repetitio…

…ns of suite, r=ahal

When we run a suite more than once we can get more than one result for
a test. Iterate over all results when writing the summary rather than
erroring out in this case.

Probably a better solution would be to only write the result from the
current run, but we don't necessarily know what that is, since it's
not tracked by the SummaryHandler.

Differential Revision: https://phabricator.services.mozilla.com/D58133

testing/mozbase/mozlog/mozlog/formatters/machformatter.py

@@ -229,10 +229,9 @@ def _format_suite_summary(self, suite, summary):
             else:
                 for test_id, results in intermittent_logs.items():
                     test = self._get_file_name(test_id)
-                    assert len(results) == 1
-                    data = results[0]
-                    assert "subtest" not in data
-                    rv.append(self._format_status(test, data).rstrip())
+                    for data in results:
+                        assert "subtest" not in data
+                        rv.append(self._format_status(test, data).rstrip())
 
         # Format status
         testfailed = any(count[key]["unexpected"] for key in ('test', 'subtest', 'assert'))
@@ -252,10 +251,9 @@ def _format_suite_summary(self, suite, summary):
             else:
                 for test_id, results in logs.items():
                     test = self._get_file_name(test_id)
-                    assert len(results) == 1
-                    data = results[0]
-                    assert "subtest" not in data
-                    rv.append(self._format_status(test, data).rstrip())
+                    for data in results:
+                        assert "subtest" not in data
+                        rv.append(self._format_status(test, data).rstrip())
 
             # Format harness errors
             if harness_errors: