// in "Range": "bytes=-N", and should reject "bytes=--2".
func TestServeFileRejectsInvalidSuffixLengths(t *testing.T) {
	run(t, testServeFileRejectsInvalidSuffixLengths, []testMode{http1Mode, https1Mode, http2Mode})
}
func testServeFileRejectsInvalidSuffixLengths(t *testing.T, mode testMode) {
	cst := newClientServerTest(t, mode, FileServer(Dir("testdata"))).ts

	tests := []struct {