add testcase for vim modeline

tests/samples/codefiles/python_without_extension

@@ -0,0 +1,36 @@
+# -*- coding: utf-8 -*-
+# vim: set filetype=python
+
+
+import os, sys
+import django
+from app import *
+from flask import session
+import simplejson as json
+from . import privatemodule
+from jinja import tags
+from pygments.lexers import BaseLexer
+from . import LocalClass
+from . import MyClass as MyParser
+from ..compat import u
+from sqlalchemy import (
+    functions as sqlfunctions,
+    orm as sqlorm,
+)
+
+try:
+    from mock import ANY
+except ImportError:
+    from unittest.mock import ANY
+
+
+class MyClass(object):
+    """this class
+    """
+
+    def method1(self):
+        a = 1 + 2
+        b = 'hello world!'
+        for x in y:
+            print(x)
+        raise Exception()

tests/test_languages.py

@@ -87,3 +87,19 @@ class LanguagesTestCase(utils.TestCase):
             result = guess_language(source_file)
             mock_guess_lexer.assert_called_once_with(source_file)
             self.assertEquals(result, (None, None))
+
+    def test_guess_language_from_vim_modeline(self):
+        response = Response()
+        response.status_code = 500
+        self.patched['wakatime.packages.requests.adapters.HTTPAdapter.send'].return_value = response
+
+        now = u(int(time.time()))
+        config = 'tests/samples/configs/good_config.cfg'
+        entity = 'tests/samples/codefiles/python_without_extension'
+        args = ['--file', entity, '--config', config, '--time', now]
+
+        retval = execute(args)
+        self.assertEquals(retval, 102)
+
+        language = u('Python')
+        self.assertEqual(self.patched['wakatime.offlinequeue.Queue.push'].call_args[0][0]['language'], language)