Issue #16803: Stop having test.test_importlib.abc ABCs inherit from

unittest.TestCase in prep of running tests under frozen and source
importlib.

1 files changed, 6 insertions, 1 deletions

diff --git a/Lib/test/test_importlib/source/test_file_loader.py b/Lib/test/test_importlib/source/test_file_loader.py
index 66ad96e..9e035ea 100644
--- a/Lib/test/test_importlib/source/test_file_loader.py
+++ b/Lib/test/test_importlib/source/test_file_loader.py
@@ -19,7 +19,7 @@ import unittest
 from test.support import make_legacy_pyc, unload
 
 
-class SimpleTest(unittest.TestCase):
+class SimpleTest(unittest.TestCase, abc.LoaderTests):
 
     """Should have no issue importing a source module [basic]. And if there is
     a syntax error, it should raise a SyntaxError [syntax error].
@@ -177,6 +177,11 @@ class SimpleTest(unittest.TestCase):
             # The pyc file was created.
             os.stat(compiled)
 
+    def test_unloadable(self):
+        loader = machinery.SourceFileLoader('good name', {})
+        with self.assertRaises(ImportError):
+            loader.load_module('bad name')
+
 
 class BadBytecodeTest(unittest.TestCase):