Function TestReadIntOverflows

msgp/read_test.go:476–581

(t *testing.T)

}

func TestReadIntOverflows(t *testing.T) {
	var buf bytes.Buffer
	wr := NewWriter(&buf)
	rd := NewReader(&buf)

	i8, i16, i32, i64, u8, u16, u32, u64 := 1, 2, 3, 4, 5, 6, 7, 8

	overflowErr := func(err error, failBits int) bool {
		bits := 0
		switch err := err.(type) {
		case IntOverflow:
			bits = err.FailedBitsize
		case UintOverflow:
			bits = err.FailedBitsize
		}
		return bits == failBits
	}

	belowZeroErr := func(err error, failBits int) bool {
		switch err.(type) {
		case UintBelowZero:
			return true
		}
		return false
	}

	vs := []struct {
		v        any
		rdBits   int
		failBits int
		errCheck func(err error, failBits int) bool
	}{
		{uint64(math.MaxInt64), i32, 32, overflowErr},
		{uint64(math.MaxInt64), i16, 16, overflowErr},
		{uint64(math.MaxInt64), i8, 8, overflowErr},

		{uint64(math.MaxUint64), i64, 64, overflowErr},
		{uint64(math.MaxUint64), i32, 64, overflowErr},
		{uint64(math.MaxUint64), i16, 64, overflowErr},
		{uint64(math.MaxUint64), i8, 64, overflowErr},

		{uint64(math.MaxUint32), i32, 32, overflowErr},
		{uint64(math.MaxUint32), i16, 16, overflowErr},
		{uint64(math.MaxUint32), i8, 8, overflowErr},

		{int64(math.MinInt64), u64, 64, belowZeroErr},
		{int64(math.MinInt64), u32, 64, belowZeroErr},
		{int64(math.MinInt64), u16, 64, belowZeroErr},
		{int64(math.MinInt64), u8, 64, belowZeroErr},
		{int64(math.MinInt32), u64, 64, belowZeroErr},
		{int64(math.MinInt32), u32, 32, belowZeroErr},
		{int64(math.MinInt32), u16, 16, belowZeroErr},
		{int64(math.MinInt32), u8, 8, belowZeroErr},
		{int64(math.MinInt16), u64, 64, belowZeroErr},
		{int64(math.MinInt16), u32, 32, belowZeroErr},
		{int64(math.MinInt16), u16, 16, belowZeroErr},
		{int64(math.MinInt16), u8, 8, belowZeroErr},
		{int64(math.MinInt8), u64, 64, belowZeroErr},