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41 lines
1.4 KiB
Go
41 lines
1.4 KiB
Go
package inf
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import (
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"math/big"
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"testing"
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)
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var decQuoRemZZZ = []struct {
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z, x, y *Dec
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r *big.Rat
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srA, srB int
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}{
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// basic examples
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{NewDec(1, 0), NewDec(2, 0), NewDec(2, 0), big.NewRat(0, 1), 0, 1},
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{NewDec(15, 1), NewDec(3, 0), NewDec(2, 0), big.NewRat(0, 1), 0, 1},
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{NewDec(1, 1), NewDec(1, 0), NewDec(10, 0), big.NewRat(0, 1), 0, 1},
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{NewDec(0, 0), NewDec(2, 0), NewDec(3, 0), big.NewRat(2, 3), 1, 1},
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{NewDec(0, 0), NewDec(2, 0), NewDec(6, 0), big.NewRat(1, 3), 1, 1},
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{NewDec(1, 1), NewDec(2, 0), NewDec(12, 0), big.NewRat(2, 3), 1, 1},
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// examples from the Go Language Specification
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{NewDec(1, 0), NewDec(5, 0), NewDec(3, 0), big.NewRat(2, 3), 1, 1},
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{NewDec(-1, 0), NewDec(-5, 0), NewDec(3, 0), big.NewRat(-2, 3), -1, 1},
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{NewDec(-1, 0), NewDec(5, 0), NewDec(-3, 0), big.NewRat(-2, 3), 1, -1},
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{NewDec(1, 0), NewDec(-5, 0), NewDec(-3, 0), big.NewRat(2, 3), -1, -1},
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}
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func TestDecQuoRem(t *testing.T) {
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for i, a := range decQuoRemZZZ {
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z, rA, rB := new(Dec), new(big.Int), new(big.Int)
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s := scaleQuoExact{}.Scale(a.x, a.y)
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z.quoRem(a.x, a.y, s, true, rA, rB)
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if a.z.Cmp(z) != 0 || a.r.Cmp(new(big.Rat).SetFrac(rA, rB)) != 0 {
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t.Errorf("#%d QuoRemZZZ got %v, %v, %v; expected %v, %v", i, z, rA, rB, a.z, a.r)
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}
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if a.srA != rA.Sign() || a.srB != rB.Sign() {
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t.Errorf("#%d QuoRemZZZ wrong signs, got %v, %v; expected %v, %v", i, rA.Sign(), rB.Sign(), a.srA, a.srB)
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}
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}
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}
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