Issue #14585: test_import now runs all tests under

importlib.test.import_ using builtins.__import__() instead of just the
relative import tests.

Lib/importlib/test/__init__.py

+import os
+import sys
+import unittest
+
+def test_suite(package=__package__, directory=os.path.dirname(__file__)):
+    suite = unittest.TestSuite()
+    for name in os.listdir(directory):
+        if name.startswith(('.', '__')):
+            continue
+        path = os.path.join(directory, name)
+        if (os.path.isfile(path) and name.startswith('test_') and
+                name.endswith('.py')):
+            submodule_name = os.path.splitext(name)[0]
+            module_name = "{0}.{1}".format(package, submodule_name)
+            __import__(module_name, level=0)
+            module_tests = unittest.findTestCases(sys.modules[module_name])
+            suite.addTest(module_tests)
+        elif os.path.isdir(path):
+            package_name = "{0}.{1}".format(package, name)
+            __import__(package_name, level=0)
+            package_tests = getattr(sys.modules[package_name], 'test_suite')()
+            suite.addTest(package_tests)
+        else:
+            continue
+    return suite

Lib/test/test_import.py

 import builtins
 import imp
-from importlib.test.import_ import test_relative_imports
+from importlib.test.import_ import test_suite as importlib_import_test_suite
 from importlib.test.import_ import util as importlib_util
 import importlib
 import marshal
@@ -694,21 +694,16 @@ class PycacheTests(unittest.TestCase):
         self.assertEqual(m.x, 5)
 
 
-class RelativeImportFromImportlibTests(test_relative_imports.RelativeImports):
-
-    def setUp(self):
-        self._importlib_util_flag = importlib_util.using___import__
-        importlib_util.using___import__ = True
-
-    def tearDown(self):
-        importlib_util.using___import__ = self._importlib_util_flag
-
-
 def test_main(verbose=None):
-    run_unittest(ImportTests, PycacheTests,
-                 PycRewritingTests, PathsTests, RelativeImportTests,
-                 OverridingImportBuiltinTests,
-                 RelativeImportFromImportlibTests)
+    flag = importlib_util.using___import__
+    try:
+        importlib_util.using___import__ = True
+        run_unittest(ImportTests, PycacheTests,
+                     PycRewritingTests, PathsTests, RelativeImportTests,
+                     OverridingImportBuiltinTests,
+                     importlib_import_test_suite())
+    finally:
+        importlib_util.using___import__ = flag
 
 
 if __name__ == '__main__':