| 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. |