{"bytes=-1-1", true},
	}
	for i, testCase := range validRangeSpecs {
		rs, err := parseRequestRangeSpec(testCase.spec)
		if err != nil {
			if !testCase.errExpected || err == nil && testCase.errExpected {
				t.Errorf("unexpected err: %v", err)
			}
			continue
		}
		h, err := rs.ToHeader()
		if err != nil && !testCase.errExpected || err == nil && testCase.errExpected {