[test] Ensure setUpClass is called in the parallel test runner. NFC (#23681)

Author: sbc100

test/common.py

@@ -1167,7 +1167,6 @@ def set_temp_dir(self, temp_dir):
   @classmethod
   def setUpClass(cls):
     super().setUpClass()
-    print('(checking sanity from test runner)') # do this after we set env stuff
     shared.check_sanity(force=True)
 
   def setUp(self):

test/parallel_testsuite.py

@@ -16,6 +16,7 @@
 
 
 NUM_CORES = None
+seen_class = set()
 
 
 def run_test(test):
@@ -24,6 +25,9 @@ def run_test(test):
   temp_dir = tempfile.mkdtemp(prefix='emtest_')
   test.set_temp_dir(temp_dir)
   try:
+    if test.__class__ not in seen_class:
+      seen_class.add(test.__class__)
+      test.__class__.setUpClass()
     test(result)
   except unittest.SkipTest as e:
     result.addSkip(test, e)

test/test_core.py

@@ -317,6 +317,12 @@ def is_sanitizing(args):
 
 
 class TestCoreBase(RunnerCore):
+  @classmethod
+  def setUpClass(cls):
+    """setUpClass included purely so we can verify that is run."""
+    super().setUpClass()
+    cls.doneSetup = True
+
   # A simple check whether the compiler arguments cause optimization.
   def is_optimizing(self):
     return '-O' in str(self.emcc_args) and '-O0' not in self.emcc_args
@@ -9551,6 +9557,7 @@ def tearDown(self):
   TT.tearDown = tearDown
 
   def setUp(self):
+    assert self.__class__.doneSetup
     super(TT, self).setUp()
     for k, v in self.env.items():
       assert k not in os.environ, k + ' should not be in environment'

test/test_other.py

@@ -241,6 +241,16 @@ def deminify_syms(names, minification_map):
 
 
 class other(RunnerCore):
+  @classmethod
+  def setUpClass(cls):
+    """setUpClass included purely so we can verify that is run."""
+    super().setUpClass()
+    cls.doneSetup = True
+
+  def setUp(self):
+    assert self.__class__.doneSetup
+    super().setUp()
+
   def assertIsObjectFile(self, filename):
     self.assertTrue(building.is_wasm(filename))