Example of refactoring using rope library.

tools/telemetry/third_party/rope/ropetest/simplifytest.py

+import unittest
+
+from rope.base import simplify
+
+
+class SimplifyTest(unittest.TestCase):
+
+    def setUp(self):
+        super(SimplifyTest, self).setUp()
+
+    def tearDown(self):
+        super(SimplifyTest, self).tearDown()
+
+    def test_trivial_case(self):
+        self.assertEquals('', simplify.real_code(''))
+
+    def test_empty_strs(self):
+        code = 's = ""\n'
+        self.assertEquals(code, simplify.real_code(code))
+
+    def test_blanking_strs(self):
+        code = 's = "..."\n'
+        self.assertEquals('s = "   "\n', simplify.real_code(code))
+
+    def test_changing_to_double_quotes(self):
+        code = 's = \'\'\n'
+        self.assertEquals('s = ""\n', simplify.real_code(code))
+
+    def test_changing_to_double_quotes2(self):
+        code = 's = """\n"""\n'
+        self.assertEquals('s = "     "\n', simplify.real_code(code))
+
+    def test_removing_comments(self):
+        code = '# c\n'
+        self.assertEquals('   \n', simplify.real_code(code))
+
+    def test_removing_comments_that_contain_strings(self):
+        code = '# "c"\n'
+        self.assertEquals('     \n', simplify.real_code(code))
+
+    def test_removing_strings_containing_comments(self):
+        code = '"#c"\n'
+        self.assertEquals('"  "\n', simplify.real_code(code))
+
+    def test_joining_implicit_continuations(self):
+        code = '(\n)\n'
+        self.assertEquals('( )\n', simplify.real_code(code))
+
+    def test_joining_explicit_continuations(self):
+        code = '1 + \\\n 2\n'
+        self.assertEquals('1 +    2\n', simplify.real_code(code))
+
+    def test_replacing_tabs(self):
+        code = '1\t+\t2\n'
+        self.assertEquals('1 + 2\n', simplify.real_code(code))
+
+    def test_replacing_semicolons(self):
+        code = 'a = 1;b = 2\n'
+        self.assertEquals('a = 1\nb = 2\n', simplify.real_code(code))
+
+
+def suite():
+    result = unittest.TestSuite()
+    result.addTests(unittest.makeSuite(SimplifyTest))
+    return result
+
+if __name__ == '__main__':
+    unittest.main()