Issue #21918: Convert test_tools.py to a sub-package of test.

Lib/test/test_tools/test_gprof2html.py

@@ -0,0 +1,36 @@
+"""Tests for the gprof2html script in the Tools directory."""
+
+import os
+import sys
+import importlib
+import unittest
+from unittest import mock
+import tempfile
+
+from test.test_tools import scriptsdir, skip_if_missing, import_tool
+
+skip_if_missing()
+
+class Gprof2htmlTests(unittest.TestCase):
+
+    def setUp(self):
+        self.gprof = import_tool('gprof2html')
+        oldargv = sys.argv
+        def fixup():
+            sys.argv = oldargv
+        self.addCleanup(fixup)
+        sys.argv = []
+
+    def test_gprof(self):
+        # Issue #14508: this used to fail with an NameError.
+        with mock.patch.object(self.gprof, 'webbrowser') as wmock, \
+                tempfile.TemporaryDirectory() as tmpdir:
+            fn = os.path.join(tmpdir, 'abc')
+            open(fn, 'w').close()
+            sys.argv = ['gprof2html', fn]
+            self.gprof.main()
+        self.assertTrue(wmock.open.called)
+
+
+if __name__ == '__main__':
+    unittest.main()