FTWTest is the base type used when unmarshaling YAML tests files.

Input represents the input request in a stage The fields `Version`, `Method` and `URI` we want to explicitly now when they are set to "".

Meta describes the metadata information of this yaml test file.

Output is the response expected from the test.

Stage is a list of stages.

StageData is the data that is passed to the test, and the data that is returned from the test.

Test is an individual test.