Add import guard

Author: srinivasreddy

Lib/test/test_tools/test_msgfmt.py

@@ -1,67 +1,70 @@
 import unittest
 import os
 import tempfile
-from test.test_tools import imports_under_tool
+from test.test_tools import imports_under_tool, skip_if_missing
 
-with imports_under_tool('i18n'):
+skip_if_missing("i18n")
+with imports_under_tool("i18n"):
     from msgfmt import make
 
+
 class TestMsgfmt(unittest.TestCase):
 
     def setUp(self):
         self.test_dir = tempfile.TemporaryDirectory()
         self.addCleanup(self.test_dir.cleanup)
 
     def create_po_file(self, content):
-        po_file_path = os.path.join(self.test_dir.name, 'test.po')
-        with open(po_file_path, 'w', encoding='utf-8') as f:
+        po_file_path = os.path.join(self.test_dir.name, "test.po")
+        with open(po_file_path, "w", encoding="utf-8") as f:
             f.write(content)
         return po_file_path
 
     def test_make_creates_mo_file(self):
-        po_content = '''
+        po_content = """
         msgid ""
         msgstr ""
         "Content-Type: text/plain; charset=UTF-8\\n"
 
         msgid "Hello"
         msgstr "Bonjour"
-        '''
+        """
         po_file = self.create_po_file(po_content)
-        mo_file = os.path.splitext(po_file)[0] + '.mo'
+        mo_file = os.path.splitext(po_file)[0] + ".mo"
 
         make(po_file, mo_file)
 
         self.assertTrue(os.path.exists(mo_file))
 
     def test_make_handles_fuzzy(self):
-        po_content = '''
+        po_content = """
         msgid ""
         msgstr ""
         "Content-Type: text/plain; charset=UTF-8\\n"
 
         #, fuzzy
         msgid "Hello"
         msgstr "Bonjour"
-        '''
+        """
         po_file = self.create_po_file(po_content)
-        mo_file = os.path.splitext(po_file)[0] + '.mo'
+        mo_file = os.path.splitext(po_file)[0] + ".mo"
 
         make(po_file, mo_file)
 
         self.assertTrue(os.path.exists(mo_file))
 
     def test_make_invalid_po_file(self):
-        po_content = '''
+        po_content = """
         msgid "Hello"
         msgstr "Bonjour"
         msgid_plural "Hellos"
-        '''
+        """
         po_file = self.create_po_file(po_content)
-        mo_file = os.path.splitext(po_file)[0] + '.mo'
+        mo_file = os.path.splitext(po_file)[0] + ".mo"
 
         with self.assertRaises(SystemExit):
             make(po_file, mo_file)
 
-if __name__ == '__main__':
+
+if __name__ == "__main__":
     unittest.main()