}
	return s[len(prefix):], true
}

// CutSuffix returns s without the provided ending suffix byte slice
// and reports whether it found the suffix.
// If s doesn't end with suffix, CutSuffix returns s, false.
// If suffix is the empty byte slice, CutSuffix returns s, true.
//
// CutSuffix returns slices of the original slice s, not copies.
func CutSuffix(s, suffix []byte) (before []byte, found bool) {

	{"", "d", "", false},
	{"", "", "", true},
}

func TestCutSuffix(t *testing.T) {
	for _, tt := range cutSuffixTests {
		if before, found := CutSuffix([]byte(tt.s), []byte(tt.sep)); string(before) != tt.before || found != tt.found {
			t.Errorf("CutSuffix(%q, %q) = %q, %v, want %q, %v", tt.s, tt.sep, before, found, tt.before, tt.found)
		}
	}
}

func TestBufferGrowNegative(t *testing.T) {
	defer func() {