add assertions for w3c (appium#384)

Author: KazuCocoa

test/unit/webdriver/device/lock_test.py

@@ -47,7 +47,7 @@ def test_lock_no_args(self):
         driver.lock()
 
         d = get_httpretty_request_body(httpretty.last_request())
-        assert len(d.keys()) == 1
+        assert d == {}
 
     @httpretty.activate
     def test_islocked_false(self):

test/unit/webdriver/webdriver_test.py

@@ -59,6 +59,7 @@ def test_create_session(self):
 
         assert driver.session_id == 'session-id'
         assert driver.w3c
+        assert driver.command_executor.w3c
 
     @httpretty.activate
     def test_create_session_forceMjsonwp(self):
@@ -92,6 +93,7 @@ def test_create_session_forceMjsonwp(self):
 
         assert driver.session_id == 'session-id'
         assert driver.w3c is False
+        assert driver.command_executor.w3c is False
 
     @httpretty.activate
     def test_create_session_change_session_id(self):