51 lines
875 B
Go
51 lines
875 B
Go
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package math
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import (
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gmath "math"
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"testing"
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)
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type operation byte
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const (
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sub operation = iota
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add
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mul
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)
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func TestOverflow(t *testing.T) {
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for i, test := range []struct {
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x uint64
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y uint64
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overflow bool
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op operation
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}{
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// add operations
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{gmath.MaxUint64, 1, true, add},
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{gmath.MaxUint64 - 1, 1, false, add},
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// sub operations
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{0, 1, true, sub},
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{0, 0, false, sub},
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// mul operations
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{10, 10, false, mul},
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{gmath.MaxUint64, 2, true, mul},
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{gmath.MaxUint64, 1, false, mul},
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} {
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var overflows bool
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switch test.op {
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case sub:
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_, overflows = SafeSub(test.x, test.y)
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case add:
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_, overflows = SafeAdd(test.x, test.y)
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case mul:
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_, overflows = SafeMul(test.x, test.y)
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}
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if test.overflow != overflows {
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t.Errorf("%d failed. Expected test to be %v, got %v", i, test.overflow, overflows)
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}
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}
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}
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