| Header | 
| AbstractMessageTest | Base testcase class for all Guzzle testcases. | 
| EntityEnclosingRequestTest | Base testcase class for all Guzzle testcases. | 
| HeaderComparison | Class used to compare HTTP headers using a custom DSL | 
| HeaderTest | Base testcase class for all Guzzle testcases. | 
| HttpRequestFactoryTest | Base testcase class for all Guzzle testcases. | 
| PostFileTest | Base testcase class for all Guzzle testcases. | 
| RequestTest | Base testcase class for all Guzzle testcases. |