Issue #15168: Move importlb.test to test.test_importlib.

This should make the Linux distros happy as it is now easier to leave
importlib's tests out of their base Python distribution.

Lib/test/test_importlib/frozen/test_finder.py

@@ -0,0 +1,47 @@
+from importlib import machinery
+from .. import abc
+
+import unittest
+
+
+class FinderTests(abc.FinderTests):
+
+    """Test finding frozen modules."""
+
+    def find(self, name, path=None):
+        finder = machinery.FrozenImporter
+        return finder.find_module(name, path)
+
+    def test_module(self):
+        name = '__hello__'
+        loader = self.find(name)
+        self.assertTrue(hasattr(loader, 'load_module'))
+
+    def test_package(self):
+        loader = self.find('__phello__')
+        self.assertTrue(hasattr(loader, 'load_module'))
+
+    def test_module_in_package(self):
+        loader = self.find('__phello__.spam', ['__phello__'])
+        self.assertTrue(hasattr(loader, 'load_module'))
+
+    def test_package_in_package(self):
+        # No frozen package within another package to test with.
+        pass
+
+    def test_package_over_module(self):
+        # No easy way to test.
+        pass
+
+    def test_failure(self):
+        loader = self.find('<not real>')
+        self.assertIsNone(loader)
+
+
+def test_main():
+    from test.support import run_unittest
+    run_unittest(FinderTests)
+
+
+if __name__ == '__main__':
+    test_main()