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