public InvocationTester(Action<HttpRequestMessage> assert = null, Action<HttpRequestFactory> configure = null, Action<IEnumerable<Parameter>, ParameterTransformContext> pipelineAction = null, ApiSettings settings = null) { _settings = settings ?? new ApiSettings(); _assert = assert ?? (a => { }); _configure = configure ?? (a => { }); _pipelineAction = pipelineAction ?? ((a, b) => { }); }