[IMP] core: reporting after tests

Currently there are a few issues with testing reporting (at the
command-line):

1. there is a global report after at_install tests, but it gets
   "scrolled off" by long post_install tests, and is thus easy to
   miss
2. with test tags, it's easy to fat finger a typo and run 0 tests,
   which look like everything's running fine (no failure)

To improve this, print a global report at shutdown (in
`--stop-after-init` mode if tests are enabled) which recapitulates the
test results *and prints a warning if no tests were run at all*.

Also update the reporting collection to make this more reliable:

* have `run_unit_tests` return `None` if it has run no tests, the
  assertion reporting machinery counts this as neither success nor
  failure which is exactly what we want
* have load_test only report a success *if files were actually
  loaded* (by having `load_data` return that information)

Task 2301268

closes odoo/odoo#54812

Signed-off-by: Xavier Morel (xmo) <xmo@odoo.com>

odoo/modules/loading.py

@@ -33,6 +33,8 @@ def load_data(cr, idref, mode, kind, package, report):
     noupdate is False, unless it is demo data or it is csv data in
     init mode.
 
+    :returns: Whether a file was loaded
+    :rtype: bool
     """
 
     def _get_files_of_kind(kind):
@@ -57,6 +59,7 @@ def load_data(cr, idref, mode, kind, package, report):
                     )
         return files
 
+    filename = None
     try:
         if kind in ('demo', 'test'):
             threading.currentThread().testing = True
@@ -70,6 +73,7 @@ def load_data(cr, idref, mode, kind, package, report):
         if kind in ('demo', 'test'):
             threading.currentThread().testing = False
 
+    return bool(filename)
 
 def load_demo(cr, package, idref, mode, report=None):
     """
@@ -130,8 +134,8 @@ def load_module_graph(cr, graph, status=None, perform_checks=True,
     def load_test(idref, mode):
         cr.execute("SAVEPOINT load_test_data_file")
         try:
-            load_data(cr, idref, mode, 'test', package, report)
-            return True
+            # return `None` if `load_data` didn't load any file
+            return load_data(cr, idref, mode, 'test', package, report) or None
         except Exception:
             _test_logger.exception(
                 'module %s: an exception occurred in a test', package.name)

odoo/modules/module.py

@@ -575,12 +575,11 @@ class OdooTestRunner(object):
         return result
 
 current_test = None
-
 def run_unit_tests(module_name, position='at_install'):
     """
     :returns: ``True`` if all of ``module_name``'s tests succeeded, ``False``
-              if any of them failed.
-    :rtype: bool
+              if any of them failed, ``None`` if no tests were ran.
+    :rtype: bool | None
     """
     global current_test
     # avoid dependency hell
@@ -590,7 +589,7 @@ def run_unit_tests(module_name, position='at_install'):
     threading.currentThread().testing = True
     config_tags = TagsSelector(tools.config['test_tags'])
     position_tag = TagsSelector(position)
-    r = True
+    ran_tests = failures = False
     for m in mods:
         tests = unwrap_suite(unittest.TestLoader().loadTestsFromModule(m))
         suite = OdooSuite(t for t in tests if position_tag.check(t) and config_tags.check(t))
@@ -604,13 +603,19 @@ def run_unit_tests(module_name, position='at_install'):
             if time.time() - t0 > 5:
                 log_level = logging.RUNBOT
             _logger.log(log_level, "%s ran %s tests in %.2fs, %s queries", m.__name__, result.testsRun, time.time() - t0, odoo.sql_db.sql_counter - t0_sql)
+            ran_tests = True
             if not result.wasSuccessful():
-                r = False
+                failures = True
                 _logger.error("Module %s: %d failures, %d errors", module_name, len(result.failures), len(result.errors))
 
     current_test = None
     threading.currentThread().testing = False
-    return r
+
+    if failures:
+        return False
+    if ran_tests:
+        return True
+    return None
 
 def unwrap_suite(test):
     """

odoo/service/server.py

@@ -510,6 +510,14 @@ class ThreadedServer(CommonServer):
         rc = preload_registries(preload)
 
         if stop:
+            if config['test_enable']:
+                with Registry.registries._lock:
+                    for db, registry in Registry.registries.d.items():
+                        report = registry._assertion_report
+                        log = _logger.error if report.failures \
+                         else _logger.warning if not report.successes \
+                         else _logger.info
+                        log("%d / %d tests failed when loading %s", report.failures, report.successes + report.failures, db)
             self.stop()
             return rc