More tests, coverage, and excluding lines from being covered

There are some lines that will never be hit in tests, excluding those
from being covered!

tests/test_auth.py

@@ -11,6 +11,8 @@ class TwythonAuthTestCase(unittest.TestCase):
         self.bad_api = Twython('BAD_APP_KEY', 'BAD_APP_SECRET')
 
         self.oauth2_api = Twython(app_key, app_secret, oauth_version=2)
+        self.oauth2_bad_api = Twython('BAD_APP_KEY', 'BAD_APP_SECRET',
+                                      oauth_version=2)
 
     def test_get_authentication_tokens(self):
         """Test getting authentication tokens works"""
@@ -44,6 +46,11 @@ class TwythonAuthTestCase(unittest.TestCase):
         """Test obtaining an Application Only OAuth 2 access token succeeds"""
         self.oauth2_api.obtain_access_token()
 
+    def test_obtain_access_token_bad_tokens(self):
+        """Test obtaining an Application Only OAuth 2 access token using bad app tokens fails"""
+        self.assertRaises(TwythonAuthError,
+                          self.oauth2_bad_api.obtain_access_token)
+
     def test_obtain_access_token_raises_error_when_oauth1(self):
         """Test when API is set for OAuth 1, obtain_access_token raises a
         TwythonError"""

tests/test_core.py

@@ -84,10 +84,28 @@ class TwythonAPITestCase(unittest.TestCase):
         self.api.encode('Twython is awesome!')
 
     def test_html_for_tweet(self):
-        """Test HTML for Twitter returns what we want"""
+        """Test HTML for Tweet returns what we want"""
         tweet_text = self.api.html_for_tweet(test_tweet_object)
         self.assertEqual(test_tweet_html, tweet_text)
 
+    def test_html_for_tweet_expanded_url(self):
+        """Test using expanded url in HTML for Tweet displays full urls"""
+        tweet_text = self.api.html_for_tweet(test_tweet_object,
+                                             use_expanded_url=True)
+        # Make sure full url is in HTML
+        self.assertTrue('http://google.com' in tweet_text)
+
+    def test_html_for_tweet_short_url(self):
+        """Test using expanded url in HTML for Tweet displays full urls"""
+        tweet_text = self.api.html_for_tweet(test_tweet_object, False)
+        # Make sure HTML doesn't contain the display OR exapanded url
+        self.assertTrue(not 'http://google.com' in tweet_text)
+        self.assertTrue(not 'google.com' in tweet_text)
+
+    def test_raise_error_on_bad_ssl_cert(self):
+        """Test TwythonError is raised by a RequestException when an actual HTTP happens"""
+        self.assertRaises(TwythonError, self.api.get, 'https://example.com')
+
     # Timelines
     def test_get_mentions_timeline(self):
         """Test returning mentions timeline for authenticated user succeeds"""

tests/test_streaming.py

@@ -19,6 +19,16 @@ class TwythonStreamTestCase(unittest.TestCase):
         self.api = MyStreamer(app_key, app_secret,
                               oauth_token, oauth_token_secret)
 
+        client_args = {
+            'headers': {
+                'User-Agent': '__twython__ Stream Test'
+            }
+        }
+        # Initialize with header for coverage checking for User-Agent
+        self.api_with_header = MyStreamer(app_key, app_secret,
+                                          oauth_token, oauth_token_secret,
+                                          client_args=client_args)
+
     def test_stream_status_filter(self):
         self.api.statuses.filter(track='twitter')