gh-129363: Change regrtest sequential mode output (#129476)

First, write the test name without color. Then, write the test name
and the result with color. Each test is displayed twice.

Co-authored-by: Hugo van Kemenade <[email protected]>

Author: vstinner

Lib/test/libregrtest/main.py

@@ -399,15 +399,11 @@ def run_tests_sequentially(self, runtests: RunTests) -> None:
             msg += " (timeout: %s)" % format_duration(runtests.timeout)
         self.log(msg)
 
-        previous_test = None
         tests_iter = runtests.iter_tests()
         for test_index, test_name in enumerate(tests_iter, 1):
             start_time = time.perf_counter()
 
-            text = test_name
-            if previous_test:
-                text = '%s -- %s' % (text, previous_test)
-            self.logger.display_progress(test_index, text)
+            self.logger.display_progress(test_index, test_name)
 
             result = self.run_test(test_name, runtests, tracer)
 
@@ -424,19 +420,14 @@ def run_tests_sequentially(self, runtests: RunTests) -> None:
                 except (KeyError, AttributeError):
                     pass
 
-            if result.must_stop(self.fail_fast, self.fail_env_changed):
-                break
-
-            previous_test = str(result)
+            text = str(result)
             test_time = time.perf_counter() - start_time
             if test_time >= PROGRESS_MIN_TIME:
-                previous_test = "%s in %s" % (previous_test, format_duration(test_time))
-            elif result.state == State.PASSED:
-                # be quiet: say nothing if the test passed shortly
-                previous_test = None
+                text = f"{text} in {format_duration(test_time)}"
+            self.logger.display_progress(test_index, text)
 
-        if previous_test:
-            print(previous_test)
+            if result.must_stop(self.fail_fast, self.fail_env_changed):
+                break
 
     def get_state(self) -> str:
         state = self.results.get_state(self.fail_env_changed)

Lib/test/test_regrtest.py

@@ -42,6 +42,17 @@
 ROOT_DIR = os.path.join(os.path.dirname(__file__), '..', '..')
 ROOT_DIR = os.path.abspath(os.path.normpath(ROOT_DIR))
 LOG_PREFIX = r'[0-9]+:[0-9]+:[0-9]+ (?:load avg: [0-9]+\.[0-9]{2} )?'
+RESULT_REGEX = (
+    'passed',
+    'failed',
+    'skipped',
+    'interrupted',
+    'env changed',
+    'timed out',
+    'ran no tests',
+    'worker non-zero exit code',
+)
+RESULT_REGEX = fr'(?:{"|".join(RESULT_REGEX)})'
 
 EXITCODE_BAD_TEST = 2
 EXITCODE_ENV_CHANGED = 3
@@ -555,8 +566,8 @@ def check_line(self, output, pattern, full=False, regex=True):
         self.assertRegex(output, regex)
 
     def parse_executed_tests(self, output):
-        regex = (r'^%s\[ *[0-9]+(?:/ *[0-9]+)*\] (%s)'
-                 % (LOG_PREFIX, self.TESTNAME_REGEX))
+        regex = (fr'^{LOG_PREFIX}\[ *[0-9]+(?:/ *[0-9]+)*\] '
+                 fr'({self.TESTNAME_REGEX}) {RESULT_REGEX}')
         parser = re.finditer(regex, output, re.MULTILINE)
         return list(match.group(1) for match in parser)