// function type for creating signed requests - used to repeat
	// requests with V2 and V4 signing.
	type testSignedReqFn func(method, urlStr string, contentLength int64,
		body io.ReadSeeker, accessKey, secretKey string, metamap map[string]string) (*http.Request,
		error)

	mkGetReq := func(oi ObjectInput, byteRange string, i int, mkSignedReq testSignedReqFn) {
		object := oi.objectName
		rec := httptest.NewRecorder()