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struct_test.go
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struct_test.go
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package bpl_test
import (
"bytes"
"encoding/binary"
"encoding/json"
"reflect"
"testing"
"github.com/goplus/bpl"
bin "github.com/goplus/bpl/binary"
"github.com/qiniu/x/bufiox"
)
type fixedType struct {
A int8
B uint16
C uint32
D float32
}
func TestFixedStruct(t *testing.T) {
v := fixedType{
A: 1,
B: 2,
C: 3,
D: 3.14,
}
b := new(bytes.Buffer)
err := binary.Write(b, binary.LittleEndian, &v)
if err != nil {
t.Fatal("binary.Write failed:", err)
}
if b.Len() != 11 {
t.Fatal("len != 11")
}
members := []bpl.Ruler{
&bpl.Member{Name: "a", Type: bpl.Int8},
&bpl.Member{Name: "b", Type: bpl.Uint16},
&bpl.Member{Name: "c", Type: bpl.Uint32},
&bpl.Member{Name: "d", Type: bpl.Float32},
}
struc := bpl.Struct(members)
if struc.SizeOf() != 11 {
t.Fatal("struct.size != 11 - ", struc.SizeOf())
}
in := bufiox.NewReaderBuffer(b.Bytes())
if in.Buffered() != 11 {
t.Fatal("len != 11")
}
ctx := bpl.NewContext()
ret, err := struc.Match(in, ctx)
if err != nil {
t.Fatal("struc.Match failed:", err)
}
text, err := json.Marshal(ret)
if err != nil {
t.Fatal("json.Marshal failed:", err)
}
if string(text) != `{"a":1,"b":2,"c":3,"d":3.14}` {
t.Fatal("json.Marshal result:", string(text))
}
}
type subType struct {
Foo string
}
type fooType struct {
A int8
B uint16
C uint32
D float32
E string
F subType
G float64
}
var (
rSubType = bpl.Seq(bpl.CString)
rFooType = bpl.Seq(bpl.Int8, bpl.Uint16, bpl.Uint32, bpl.Float32, bpl.CString, rSubType, bpl.Float64)
rFooType2 = bpl.And(bpl.Seq(bpl.Int8, bpl.Uint16), bpl.Uint32, bpl.Float32, bpl.CString, bpl.Seq(rSubType), bpl.Float64)
)
func TestStruct(t *testing.T) {
foo := &fooType{
A: 1, B: 2, C: 3, D: 3.14, E: "Hello", F: subType{Foo: "foo"}, G: 7.52,
// 1 + 2 + 4 + 4 + 6 + 4 + 8 = 29
}
b, err := bin.Marshal(&foo)
if err != nil {
t.Fatal("binary.Marshal failed:", err)
}
if len(b) != 29 {
t.Fatal("len(b) != 29, len:", len(b), "data:", string(b))
}
fooTyp := reflect.TypeOf(foo)
r, err := bpl.TypeFrom(fooTyp)
if err != nil {
t.Fatal("bpl.TypeFrom failed:", err)
}
in := bufiox.NewReaderBuffer(b)
ctx := bpl.NewContext()
v, err := r.Match(in, ctx)
if err != nil {
t.Fatal("Match failed:", err, "len:", len(b))
}
ret, err := json.Marshal(v)
if err != nil {
t.Fatal("json.Marshal failed:", err)
}
if string(ret) != `{"a":1,"b":2,"c":3,"d":3.14,"e":"Hello","f":{"foo":"foo"},"g":7.52}` {
t.Fatal("ret:", string(ret))
}
}
func TestSeq(t *testing.T) {
foo := &fooType{
A: 1, B: 2, C: 3, D: 3.14, E: "Hello", F: subType{Foo: "foo"}, G: 7.52,
// 1 + 2 + 4 + 4 + 6 + 4 + 8 = 29
}
b, err := bin.Marshal(&foo)
if err != nil {
t.Fatal("binary.Marshal failed:", err)
}
in := bufiox.NewReaderBuffer(b)
v, err := rFooType.Match(in, bpl.NewContext())
if err != nil {
t.Fatal("Match failed:", err, "len:", len(b))
}
ret, err := json.Marshal(v)
if err != nil {
t.Fatal("json.Marshal failed:", err)
}
if string(ret) != `[1,2,3,3.14,"Hello",["foo"],7.52]` {
t.Fatal("ret:", string(ret))
}
}
func TestSeq2(t *testing.T) {
foo := &fooType{
A: 1, B: 2, C: 3, D: 3.14, E: "Hello", F: subType{Foo: "foo"}, G: 7.52,
// 1 + 2 + 4 + 4 + 6 + 4 + 8 = 29
}
b, err := bin.Marshal(&foo)
if err != nil {
t.Fatal("binary.Marshal failed:", err)
}
in := bufiox.NewReaderBuffer(b)
ctx := bpl.NewContext()
_, err = rFooType2.Match(in, ctx)
if err != nil {
t.Fatal("Match failed:", err, "len:", len(b))
}
v := ctx.Dom()
ret, err := json.Marshal(v)
if err != nil {
t.Fatal("json.Marshal failed:", err)
}
if string(ret) != `[1,2,["foo"]]` {
t.Fatal("ret:", string(ret))
}
}