380 lines
10 KiB
Go
380 lines
10 KiB
Go
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package inf_test
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import (
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"bytes"
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"encoding/gob"
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"fmt"
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"math/big"
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"strings"
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"testing"
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"gopkg.in/inf.v0"
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)
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type decFunZZ func(z, x, y *inf.Dec) *inf.Dec
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type decArgZZ struct {
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z, x, y *inf.Dec
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}
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var decSumZZ = []decArgZZ{
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{inf.NewDec(0, 0), inf.NewDec(0, 0), inf.NewDec(0, 0)},
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{inf.NewDec(1, 0), inf.NewDec(1, 0), inf.NewDec(0, 0)},
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{inf.NewDec(1111111110, 0), inf.NewDec(123456789, 0), inf.NewDec(987654321, 0)},
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{inf.NewDec(-1, 0), inf.NewDec(-1, 0), inf.NewDec(0, 0)},
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{inf.NewDec(864197532, 0), inf.NewDec(-123456789, 0), inf.NewDec(987654321, 0)},
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{inf.NewDec(-1111111110, 0), inf.NewDec(-123456789, 0), inf.NewDec(-987654321, 0)},
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{inf.NewDec(12, 2), inf.NewDec(1, 1), inf.NewDec(2, 2)},
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}
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var decProdZZ = []decArgZZ{
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{inf.NewDec(0, 0), inf.NewDec(0, 0), inf.NewDec(0, 0)},
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{inf.NewDec(0, 0), inf.NewDec(1, 0), inf.NewDec(0, 0)},
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{inf.NewDec(1, 0), inf.NewDec(1, 0), inf.NewDec(1, 0)},
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{inf.NewDec(-991*991, 0), inf.NewDec(991, 0), inf.NewDec(-991, 0)},
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{inf.NewDec(2, 3), inf.NewDec(1, 1), inf.NewDec(2, 2)},
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{inf.NewDec(2, -3), inf.NewDec(1, -1), inf.NewDec(2, -2)},
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{inf.NewDec(2, 3), inf.NewDec(1, 1), inf.NewDec(2, 2)},
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}
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func TestDecSignZ(t *testing.T) {
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var zero inf.Dec
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for _, a := range decSumZZ {
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s := a.z.Sign()
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e := a.z.Cmp(&zero)
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if s != e {
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t.Errorf("got %d; want %d for z = %v", s, e, a.z)
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}
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}
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}
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func TestDecAbsZ(t *testing.T) {
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var zero inf.Dec
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for _, a := range decSumZZ {
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var z inf.Dec
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z.Abs(a.z)
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var e inf.Dec
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e.Set(a.z)
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if e.Cmp(&zero) < 0 {
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e.Sub(&zero, &e)
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}
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if z.Cmp(&e) != 0 {
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t.Errorf("got z = %v; want %v", z, e)
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}
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}
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}
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func testDecFunZZ(t *testing.T, msg string, f decFunZZ, a decArgZZ) {
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var z inf.Dec
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f(&z, a.x, a.y)
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if (&z).Cmp(a.z) != 0 {
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t.Errorf("%s%+v\n\tgot z = %v; want %v", msg, a, &z, a.z)
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}
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}
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func TestDecSumZZ(t *testing.T) {
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AddZZ := func(z, x, y *inf.Dec) *inf.Dec { return z.Add(x, y) }
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SubZZ := func(z, x, y *inf.Dec) *inf.Dec { return z.Sub(x, y) }
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for _, a := range decSumZZ {
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arg := a
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testDecFunZZ(t, "AddZZ", AddZZ, arg)
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arg = decArgZZ{a.z, a.y, a.x}
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testDecFunZZ(t, "AddZZ symmetric", AddZZ, arg)
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arg = decArgZZ{a.x, a.z, a.y}
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testDecFunZZ(t, "SubZZ", SubZZ, arg)
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arg = decArgZZ{a.y, a.z, a.x}
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testDecFunZZ(t, "SubZZ symmetric", SubZZ, arg)
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}
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}
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func TestDecProdZZ(t *testing.T) {
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MulZZ := func(z, x, y *inf.Dec) *inf.Dec { return z.Mul(x, y) }
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for _, a := range decProdZZ {
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arg := a
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testDecFunZZ(t, "MulZZ", MulZZ, arg)
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arg = decArgZZ{a.z, a.y, a.x}
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testDecFunZZ(t, "MulZZ symmetric", MulZZ, arg)
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}
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}
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var decUnscaledTests = []struct {
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d *inf.Dec
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u int64 // ignored when ok == false
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ok bool
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}{
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{new(inf.Dec), 0, true},
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{inf.NewDec(-1<<63, 0), -1 << 63, true},
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{inf.NewDec(-(-1<<63 + 1), 0), -(-1<<63 + 1), true},
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{new(inf.Dec).Neg(inf.NewDec(-1<<63, 0)), 0, false},
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{new(inf.Dec).Sub(inf.NewDec(-1<<63, 0), inf.NewDec(1, 0)), 0, false},
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{inf.NewDecBig(new(big.Int).Lsh(big.NewInt(1), 64), 0), 0, false},
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}
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func TestDecUnscaled(t *testing.T) {
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for i, tt := range decUnscaledTests {
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u, ok := tt.d.Unscaled()
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if ok != tt.ok {
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t.Errorf("#%d Unscaled: got %v, expected %v", i, ok, tt.ok)
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} else if ok && u != tt.u {
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t.Errorf("#%d Unscaled: got %v, expected %v", i, u, tt.u)
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}
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}
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}
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var decRoundTests = [...]struct {
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in *inf.Dec
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s inf.Scale
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r inf.Rounder
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exp *inf.Dec
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}{
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{inf.NewDec(123424999999999993, 15), 2, inf.RoundHalfUp, inf.NewDec(12342, 2)},
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{inf.NewDec(123425000000000001, 15), 2, inf.RoundHalfUp, inf.NewDec(12343, 2)},
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{inf.NewDec(123424999999999993, 15), 15, inf.RoundHalfUp, inf.NewDec(123424999999999993, 15)},
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{inf.NewDec(123424999999999993, 15), 16, inf.RoundHalfUp, inf.NewDec(1234249999999999930, 16)},
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{inf.NewDecBig(new(big.Int).Lsh(big.NewInt(1), 64), 0), -1, inf.RoundHalfUp, inf.NewDec(1844674407370955162, -1)},
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{inf.NewDecBig(new(big.Int).Lsh(big.NewInt(1), 64), 0), -2, inf.RoundHalfUp, inf.NewDec(184467440737095516, -2)},
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{inf.NewDecBig(new(big.Int).Lsh(big.NewInt(1), 64), 0), -3, inf.RoundHalfUp, inf.NewDec(18446744073709552, -3)},
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{inf.NewDecBig(new(big.Int).Lsh(big.NewInt(1), 64), 0), -4, inf.RoundHalfUp, inf.NewDec(1844674407370955, -4)},
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{inf.NewDecBig(new(big.Int).Lsh(big.NewInt(1), 64), 0), -5, inf.RoundHalfUp, inf.NewDec(184467440737096, -5)},
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{inf.NewDecBig(new(big.Int).Lsh(big.NewInt(1), 64), 0), -6, inf.RoundHalfUp, inf.NewDec(18446744073710, -6)},
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}
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func TestDecRound(t *testing.T) {
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for i, tt := range decRoundTests {
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z := new(inf.Dec).Round(tt.in, tt.s, tt.r)
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if tt.exp.Cmp(z) != 0 {
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t.Errorf("#%d Round got %v; expected %v", i, z, tt.exp)
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}
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}
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}
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var decStringTests = []struct {
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in string
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out string
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val int64
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scale inf.Scale // skip SetString if negative
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ok bool
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scanOk bool
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}{
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{in: "", ok: false, scanOk: false},
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{in: "a", ok: false, scanOk: false},
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{in: "z", ok: false, scanOk: false},
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{in: "+", ok: false, scanOk: false},
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{in: "-", ok: false, scanOk: false},
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{in: "g", ok: false, scanOk: false},
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{in: ".", ok: false, scanOk: false},
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{in: ".-0", ok: false, scanOk: false},
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{in: ".+0", ok: false, scanOk: false},
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// Scannable but not SetStringable
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{"0b", "ignored", 0, 0, false, true},
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{"0x", "ignored", 0, 0, false, true},
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{"0xg", "ignored", 0, 0, false, true},
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{"0.0g", "ignored", 0, 1, false, true},
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// examples from godoc for Dec
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{"0", "0", 0, 0, true, true},
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{"0.00", "0.00", 0, 2, true, true},
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{"ignored", "0", 0, -2, true, false},
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{"1", "1", 1, 0, true, true},
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{"1.00", "1.00", 100, 2, true, true},
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{"10", "10", 10, 0, true, true},
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{"ignored", "10", 1, -1, true, false},
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// other tests
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{"+0", "0", 0, 0, true, true},
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{"-0", "0", 0, 0, true, true},
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{"0.0", "0.0", 0, 1, true, true},
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{"0.1", "0.1", 1, 1, true, true},
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{"0.", "0", 0, 0, true, true},
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{"-10", "-10", -1, -1, true, true},
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{"-1", "-1", -1, 0, true, true},
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{"-0.1", "-0.1", -1, 1, true, true},
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{"-0.01", "-0.01", -1, 2, true, true},
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{"+0.", "0", 0, 0, true, true},
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{"-0.", "0", 0, 0, true, true},
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{".0", "0.0", 0, 1, true, true},
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{"+.0", "0.0", 0, 1, true, true},
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{"-.0", "0.0", 0, 1, true, true},
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{"0.0000000000", "0.0000000000", 0, 10, true, true},
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{"0.0000000001", "0.0000000001", 1, 10, true, true},
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{"-0.0000000000", "0.0000000000", 0, 10, true, true},
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{"-0.0000000001", "-0.0000000001", -1, 10, true, true},
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{"-10", "-10", -10, 0, true, true},
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{"+10", "10", 10, 0, true, true},
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{"00", "0", 0, 0, true, true},
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{"023", "23", 23, 0, true, true}, // decimal, not octal
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{"-02.3", "-2.3", -23, 1, true, true}, // decimal, not octal
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}
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func TestDecGetString(t *testing.T) {
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z := new(inf.Dec)
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for i, test := range decStringTests {
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if !test.ok {
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continue
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}
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z.SetUnscaled(test.val)
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z.SetScale(test.scale)
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s := z.String()
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if s != test.out {
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t.Errorf("#%da got %s; want %s", i, s, test.out)
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}
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s = fmt.Sprintf("%d", z)
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if s != test.out {
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t.Errorf("#%db got %s; want %s", i, s, test.out)
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}
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}
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}
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func TestDecSetString(t *testing.T) {
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tmp := new(inf.Dec)
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for i, test := range decStringTests {
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if test.scale < 0 {
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// SetString only supports scale >= 0
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continue
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}
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// initialize to a non-zero value so that issues with parsing
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// 0 are detected
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tmp.Set(inf.NewDec(1234567890, 123))
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n1, ok1 := new(inf.Dec).SetString(test.in)
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n2, ok2 := tmp.SetString(test.in)
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expected := inf.NewDec(test.val, test.scale)
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if ok1 != test.ok || ok2 != test.ok {
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t.Errorf("#%d (input '%s') ok incorrect (should be %t)", i, test.in, test.ok)
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continue
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}
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if !ok1 {
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if n1 != nil {
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t.Errorf("#%d (input '%s') n1 != nil", i, test.in)
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}
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continue
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}
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if !ok2 {
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if n2 != nil {
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t.Errorf("#%d (input '%s') n2 != nil", i, test.in)
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}
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continue
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}
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if n1.Cmp(expected) != 0 {
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t.Errorf("#%d (input '%s') got: %s want: %d", i, test.in, n1, test.val)
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}
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if n2.Cmp(expected) != 0 {
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t.Errorf("#%d (input '%s') got: %s want: %d", i, test.in, n2, test.val)
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}
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}
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}
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func TestDecScan(t *testing.T) {
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tmp := new(inf.Dec)
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for i, test := range decStringTests {
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if test.scale < 0 {
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// SetString only supports scale >= 0
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continue
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}
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// initialize to a non-zero value so that issues with parsing
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// 0 are detected
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tmp.Set(inf.NewDec(1234567890, 123))
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n1, n2 := new(inf.Dec), tmp
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nn1, err1 := fmt.Sscan(test.in, n1)
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nn2, err2 := fmt.Sscan(test.in, n2)
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if !test.scanOk {
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if err1 == nil || err2 == nil {
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t.Errorf("#%d (input '%s') ok incorrect, should be %t", i, test.in, test.scanOk)
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}
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continue
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}
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expected := inf.NewDec(test.val, test.scale)
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if nn1 != 1 || err1 != nil || nn2 != 1 || err2 != nil {
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t.Errorf("#%d (input '%s') error %d %v, %d %v", i, test.in, nn1, err1, nn2, err2)
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continue
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}
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if n1.Cmp(expected) != 0 {
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t.Errorf("#%d (input '%s') got: %s want: %d", i, test.in, n1, test.val)
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}
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if n2.Cmp(expected) != 0 {
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t.Errorf("#%d (input '%s') got: %s want: %d", i, test.in, n2, test.val)
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}
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}
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}
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var decScanNextTests = []struct {
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in string
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ok bool
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next rune
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}{
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{"", false, 0},
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{"a", false, 'a'},
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{"z", false, 'z'},
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{"+", false, 0},
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{"-", false, 0},
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{"g", false, 'g'},
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{".", false, 0},
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{".-0", false, '-'},
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{".+0", false, '+'},
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{"0b", true, 'b'},
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{"0x", true, 'x'},
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{"0xg", true, 'x'},
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{"0.0g", true, 'g'},
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}
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func TestDecScanNext(t *testing.T) {
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for i, test := range decScanNextTests {
|
||
|
|
rdr := strings.NewReader(test.in)
|
||
|
|
n1 := new(inf.Dec)
|
||
|
|
nn1, _ := fmt.Fscan(rdr, n1)
|
||
|
|
if (test.ok && nn1 == 0) || (!test.ok && nn1 > 0) {
|
||
|
|
t.Errorf("#%d (input '%s') ok incorrect should be %t", i, test.in, test.ok)
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
r := rune(0)
|
||
|
|
nn2, err := fmt.Fscanf(rdr, "%c", &r)
|
||
|
|
if test.next != r {
|
||
|
|
t.Errorf("#%d (input '%s') next incorrect, got %c should be %c, %d, %v", i, test.in, r, test.next, nn2, err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
var decGobEncodingTests = []string{
|
||
|
|
"0",
|
||
|
|
"1",
|
||
|
|
"2",
|
||
|
|
"10",
|
||
|
|
"42",
|
||
|
|
"1234567890",
|
||
|
|
"298472983472983471903246121093472394872319615612417471234712061",
|
||
|
|
}
|
||
|
|
|
||
|
|
func TestDecGobEncoding(t *testing.T) {
|
||
|
|
var medium bytes.Buffer
|
||
|
|
enc := gob.NewEncoder(&medium)
|
||
|
|
dec := gob.NewDecoder(&medium)
|
||
|
|
for i, test := range decGobEncodingTests {
|
||
|
|
for j := 0; j < 2; j++ {
|
||
|
|
for k := inf.Scale(-5); k <= 5; k++ {
|
||
|
|
medium.Reset() // empty buffer for each test case (in case of failures)
|
||
|
|
stest := test
|
||
|
|
if j != 0 {
|
||
|
|
// negative numbers
|
||
|
|
stest = "-" + test
|
||
|
|
}
|
||
|
|
var tx inf.Dec
|
||
|
|
tx.SetString(stest)
|
||
|
|
tx.SetScale(k) // test with positive, negative, and zero scale
|
||
|
|
if err := enc.Encode(&tx); err != nil {
|
||
|
|
t.Errorf("#%d%c: encoding failed: %s", i, 'a'+j, err)
|
||
|
|
}
|
||
|
|
var rx inf.Dec
|
||
|
|
if err := dec.Decode(&rx); err != nil {
|
||
|
|
t.Errorf("#%d%c: decoding failed: %s", i, 'a'+j, err)
|
||
|
|
}
|
||
|
|
if rx.Cmp(&tx) != 0 {
|
||
|
|
t.Errorf("#%d%c: transmission failed: got %s want %s", i, 'a'+j, &rx, &tx)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|