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package msgp
import (
"bytes"
"math"
"testing"
)
func TestNumber(t *testing.T) {
n := Number{}
if n.Type() != IntType {
t.Errorf("expected zero-value type to be %s; got %s", IntType, n.Type())
}
if n.String() != "0" {
t.Errorf("expected Number{}.String() to be \"0\" but got %q", n.String())
}
n.AsInt(248)
i, ok := n.Int()
if !ok || i != 248 || n.Type() != IntType || n.String() != "248" {
t.Errorf("%d in; %d out!", 248, i)
}
n.AsFloat64(3.141)
f, ok := n.Float()
if !ok || f != 3.141 || n.Type() != Float64Type || n.String() != "3.141" {
t.Errorf("%f in; %f out!", 3.141, f)
}
n.AsUint(40000)
u, ok := n.Uint()
if !ok || u != 40000 || n.Type() != UintType || n.String() != "40000" {
t.Errorf("%d in; %d out!", 40000, u)
}
nums := []interface{}{
float64(3.14159),
int64(-29081),
uint64(90821983),
float32(3.141),
}
var dat []byte
var buf bytes.Buffer
wr := NewWriter(&buf)
for _, n := range nums {
dat, _ = AppendIntf(dat, n)
wr.WriteIntf(n)
}
wr.Flush()
mout := make([]Number, len(nums))
dout := make([]Number, len(nums))
rd := NewReader(&buf)
unm := dat
for i := range nums {
var err error
unm, err = mout[i].UnmarshalMsg(unm)
if err != nil {
t.Fatal("unmarshal error:", err)
}
err = dout[i].DecodeMsg(rd)
if err != nil {
t.Fatal("decode error:", err)
}
if mout[i] != dout[i] {
t.Errorf("for %#v, got %#v from unmarshal and %#v from decode", nums[i], mout[i], dout[i])
}
}
buf.Reset()
var odat []byte
for i := range nums {
var err error
odat, err = mout[i].MarshalMsg(odat)
if err != nil {
t.Fatal("marshal error:", err)
}
err = dout[i].EncodeMsg(wr)
if err != nil {
t.Fatal("encode error", err)
}
}
wr.Flush()
if !bytes.Equal(dat, odat) {
t.Errorf("marshal: expected output %#v; got %#v", dat, odat)
}
if !bytes.Equal(dat, buf.Bytes()) {
t.Errorf("encode: expected output %#v; got %#v", dat, buf.Bytes())
}
}
func TestConv32(t *testing.T) {
for i := -1 << 24; i < 1<<25; i++ {
x := math.Float32bits(float32(i))
exp := int(x>>23)&255 - 127
mant := x & ((1 << 23) - 1)
isExact := false
if exp >= 23 || (exp == -127 && mant == 0) {
isExact = true
}
// Only exp >= 0 can be exact integer
if exp >= 0 && exp <= 23 {
mantissaMask := uint32((1 << (23 - exp)) - 1)
isExact = (mant & mantissaMask) == 0
}
n := Number{bits: uint64(x), typ: Float32Type}
got := n.isExactInt()
if got != isExact {
t.Errorf("n.IsExactInt(): got %t, want %t", got, isExact)
}
n = Number{bits: uint64(math.Float32bits(float32(i) + 0.1)), typ: Float32Type}
got = n.isExactInt()
if got != false && i > -2097152 && i < 2097152 {
val, ok := n.Float()
t.Fatalf("n.IsExactInt(%f): got %t, want %t, ok: %v", val, got, false, ok)
}
}
}
func TestConv64(t *testing.T) {
for i := -1 << 30; i < 1<<30; i++ {
if testing.Short() {
i += 8
}
x := math.Float64bits(float64(i))
exp := int(x>>52)&2047 - 1023
mant := x & ((1 << 52) - 1)
isExact := false
if exp >= 52 || (exp == -1023 && mant == 0) {
isExact = true
}
// Only exp >= 0 can be exact integer
if exp >= 0 && exp <= 52 {
mantissaMask := uint64((1 << (52 - exp)) - 1)
isExact = (mant & mantissaMask) == 0
}
n := Number{bits: uint64(x), typ: Float64Type}
got := n.isExactInt()
if got != isExact {
t.Errorf("n.IsExactInt(): got %t, want %t", got, isExact)
}
if !got {
t.Fatal(i)
}
n = Number{bits: uint64(math.Float64bits(float64(i) + 0.1)), typ: Float64Type}
got = n.isExactInt()
if got != false {
val, ok := n.Float()
t.Fatalf("n.IsExactInt(%f): got %t, want %t, ok: %v", val, got, false, ok)
}
}
}
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