Adding unit test to verify this fix is working

Author: Jeff Ammons

tests/test_channel.py

@@ -1,11 +1,23 @@
 from slackclient._channel import Channel
 import pytest
 
+def mock_channel():
+    ''' Returns a Channel object for testing. '''
 
-def test_Channel(channel):
+def test_channel(channel):
     assert type(channel) == Channel
 
+def test_channel_eq(channel):
+    channel = Channel(
+        'test-server',
+        'test-channel',
+        'C12345678',
+    )
+    assert channel == 'test-channel'
+    assert channel == '#test-channel'
+    assert channel == 'C12345678'
+    assert (channel == 'foo') is False
 
 @pytest.mark.xfail
-def test_Channel_send_message(channel):
+def test_channel_send_message(channel):
     channel.send_message('hi')