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package binary
import (
"bytes"
"fmt"
"reflect"
"testing"
"time"
. "github.com/tendermint/tendermint/common"
)
type SimpleStruct struct {
String string
Bytes []byte
Time time.Time
}
type Animal interface{}
const (
AnimalTypeCat = byte(0x01)
AnimalTypeDog = byte(0x02)
AnimalTypeSnake = byte(0x03)
AnimalTypeViper = byte(0x04)
)
// Implements Animal
type Cat struct {
SimpleStruct
}
// Implements Animal
type Dog struct {
SimpleStruct
}
// Implements Animal
type Snake []byte
// Implements Animal
type Viper struct {
Bytes []byte
}
var _ = RegisterInterface(
struct{ Animal }{},
ConcreteType{Cat{}, AnimalTypeCat},
ConcreteType{Dog{}, AnimalTypeDog},
ConcreteType{Snake{}, AnimalTypeSnake},
ConcreteType{&Viper{}, AnimalTypeViper},
)
func TestAnimalInterface(t *testing.T) {
var foo Animal
// Type of pointer to Animal
rt := reflect.TypeOf(&foo)
fmt.Printf("rt: %v\n", rt)
// Type of Animal itself.
// NOTE: normally this is acquired through other means
// like introspecting on method signatures, or struct fields.
rte := rt.Elem()
fmt.Printf("rte: %v\n", rte)
// Get a new pointer to the interface
// NOTE: calling .Interface() is to get the actual value,
// instead of reflection values.
ptr := reflect.New(rte).Interface()
fmt.Printf("ptr: %v", ptr)
// Make a binary byteslice that represents a *snake.
foo = Snake([]byte("snake"))
snakeBytes := BinaryBytes(foo)
snakeReader := bytes.NewReader(snakeBytes)
// Now you can read it.
n, err := new(int64), new(error)
it := ReadBinary(foo, snakeReader, n, err).(Animal)
fmt.Println(it, reflect.TypeOf(it))
}
//-------------------------------------
type Constructor func() interface{}
type Instantiator func() (o interface{}, ptr interface{})
type Validator func(o interface{}, t *testing.T)
type TestCase struct {
Constructor
Instantiator
Validator
}
//-------------------------------------
func constructBasic() interface{} {
cat := Cat{
SimpleStruct{
String: "String",
Bytes: []byte("Bytes"),
Time: time.Unix(123, 0),
},
}
return cat
}
func instantiateBasic() (interface{}, interface{}) {
return Cat{}, &Cat{}
}
func validateBasic(o interface{}, t *testing.T) {
cat := o.(Cat)
if cat.String != "String" {
t.Errorf("Expected cat.String == 'String', got %v", cat.String)
}
if string(cat.Bytes) != "Bytes" {
t.Errorf("Expected cat.Bytes == 'Bytes', got %X", cat.Bytes)
}
if cat.Time.Unix() != 123 {
t.Errorf("Expected cat.Time == 'Unix(123)', got %v", cat.Time)
}
}
//-------------------------------------
type NilTestStruct struct {
IntPtr *int
CatPtr *Cat
Animal Animal
}
func constructNilTestStruct() interface{} {
return NilTestStruct{}
}
func instantiateNilTestStruct() (interface{}, interface{}) {
return NilTestStruct{}, &NilTestStruct{}
}
func validateNilTestStruct(o interface{}, t *testing.T) {
nts := o.(NilTestStruct)
if nts.IntPtr != nil {
t.Errorf("Expected nts.IntPtr to be nil, got %v", nts.IntPtr)
}
if nts.CatPtr != nil {
t.Errorf("Expected nts.CatPtr to be nil, got %v", nts.CatPtr)
}
if nts.Animal != nil {
t.Errorf("Expected nts.Animal to be nil, got %v", nts.Animal)
}
}
//-------------------------------------
type ComplexStruct struct {
Name string
Animal Animal
}
func constructComplex() interface{} {
c := ComplexStruct{
Name: "Complex",
Animal: constructBasic(),
}
return c
}
func instantiateComplex() (interface{}, interface{}) {
return ComplexStruct{}, &ComplexStruct{}
}
func validateComplex(o interface{}, t *testing.T) {
c2 := o.(ComplexStruct)
if cat, ok := c2.Animal.(Cat); ok {
validateBasic(cat, t)
} else {
t.Errorf("Expected c2.Animal to be of type cat, got %v", reflect.ValueOf(c2.Animal).Elem().Type())
}
}
//-------------------------------------
type ComplexStruct2 struct {
Cat Cat
Dog *Dog
Snake Snake
Snake2 *Snake
Viper Viper
Viper2 *Viper
}
func constructComplex2() interface{} {
snake_ := Snake([]byte("hiss"))
snakePtr_ := &snake_
c := ComplexStruct2{
Cat: Cat{
SimpleStruct{
String: "String",
Bytes: []byte("Bytes"),
},
},
Dog: &Dog{
SimpleStruct{
String: "Woof",
Bytes: []byte("Bark"),
},
},
Snake: Snake([]byte("hiss")),
Snake2: snakePtr_,
Viper: Viper{Bytes: []byte("hizz")},
Viper2: &Viper{Bytes: []byte("hizz")},
}
return c
}
func instantiateComplex2() (interface{}, interface{}) {
return ComplexStruct2{}, &ComplexStruct2{}
}
func validateComplex2(o interface{}, t *testing.T) {
c2 := o.(ComplexStruct2)
cat := c2.Cat
if cat.String != "String" {
t.Errorf("Expected cat.String == 'String', got %v", cat.String)
}
if string(cat.Bytes) != "Bytes" {
t.Errorf("Expected cat.Bytes == 'Bytes', got %X", cat.Bytes)
}
dog := c2.Dog
if dog.String != "Woof" {
t.Errorf("Expected dog.String == 'Woof', got %v", dog.String)
}
if string(dog.Bytes) != "Bark" {
t.Errorf("Expected dog.Bytes == 'Bark', got %X", dog.Bytes)
}
snake := c2.Snake
if string(snake) != "hiss" {
t.Errorf("Expected string(snake) == 'hiss', got %v", string(snake))
}
snake2 := c2.Snake2
if string(*snake2) != "hiss" {
t.Errorf("Expected string(snake2) == 'hiss', got %v", string(*snake2))
}
viper := c2.Viper
if string(viper.Bytes) != "hizz" {
t.Errorf("Expected string(viper.Bytes) == 'hizz', got %v", string(viper.Bytes))
}
viper2 := c2.Viper2
if string(viper2.Bytes) != "hizz" {
t.Errorf("Expected string(viper2.Bytes) == 'hizz', got %v", string(viper2.Bytes))
}
}
//-------------------------------------
type ComplexStructArray struct {
Animals []Animal
Bytes [5]byte
Ints [5]int
Array SimpleArray
}
func constructComplexArray() interface{} {
c := ComplexStructArray{
Animals: []Animal{
Cat{
SimpleStruct{
String: "String",
Bytes: []byte("Bytes"),
},
},
Dog{
SimpleStruct{
String: "Woof",
Bytes: []byte("Bark"),
},
},
Snake([]byte("hiss")),
&Viper{
Bytes: []byte("hizz"),
},
},
Bytes: [5]byte{1, 10, 50, 100, 200},
Ints: [5]int{1, 2, 3, 4, 5},
Array: SimpleArray([5]byte{1, 10, 50, 100, 200}),
}
return c
}
func instantiateComplexArray() (interface{}, interface{}) {
return ComplexStructArray{}, &ComplexStructArray{}
}
func validateComplexArray(o interface{}, t *testing.T) {
c2 := o.(ComplexStructArray)
if cat, ok := c2.Animals[0].(Cat); ok {
if cat.String != "String" {
t.Errorf("Expected cat.String == 'String', got %v", cat.String)
}
if string(cat.Bytes) != "Bytes" {
t.Errorf("Expected cat.Bytes == 'Bytes', got %X", cat.Bytes)
}
} else {
t.Errorf("Expected c2.Animals[0] to be of type cat, got %v", reflect.ValueOf(c2.Animals[0]).Elem().Type())
}
if dog, ok := c2.Animals[1].(Dog); ok {
if dog.String != "Woof" {
t.Errorf("Expected dog.String == 'Woof', got %v", dog.String)
}
if string(dog.Bytes) != "Bark" {
t.Errorf("Expected dog.Bytes == 'Bark', got %X", dog.Bytes)
}
} else {
t.Errorf("Expected c2.Animals[1] to be of type dog, got %v", reflect.ValueOf(c2.Animals[1]).Elem().Type())
}
if snake, ok := c2.Animals[2].(Snake); ok {
if string(snake) != "hiss" {
t.Errorf("Expected string(snake) == 'hiss', got %v", string(snake))
}
} else {
t.Errorf("Expected c2.Animals[2] to be of type Snake, got %v", reflect.ValueOf(c2.Animals[2]).Elem().Type())
}
if viper, ok := c2.Animals[3].(*Viper); ok {
if string(viper.Bytes) != "hizz" {
t.Errorf("Expected string(viper.Bytes) == 'hizz', got %v", string(viper.Bytes))
}
} else {
t.Errorf("Expected c2.Animals[3] to be of type *Viper, got %v", reflect.ValueOf(c2.Animals[3]).Elem().Type())
}
}
//-----------------------------------------------------------------------------
var testCases = []TestCase{}
func init() {
testCases = append(testCases, TestCase{constructBasic, instantiateBasic, validateBasic})
testCases = append(testCases, TestCase{constructComplex, instantiateComplex, validateComplex})
testCases = append(testCases, TestCase{constructComplex2, instantiateComplex2, validateComplex2})
testCases = append(testCases, TestCase{constructComplexArray, instantiateComplexArray, validateComplexArray})
testCases = append(testCases, TestCase{constructNilTestStruct, instantiateNilTestStruct, validateNilTestStruct})
}
func TestBinary(t *testing.T) {
for i, testCase := range testCases {
log.Notice(fmt.Sprintf("Running test case %v", i))
// Construct an object
o := testCase.Constructor()
// Write the object
data := BinaryBytes(o)
t.Logf("Binary: %X", data)
instance, instancePtr := testCase.Instantiator()
// Read onto a struct
n, err := new(int64), new(error)
res := ReadBinary(instance, bytes.NewReader(data), n, err)
if *err != nil {
t.Fatalf("Failed to read into instance: %v", *err)
}
// Validate object
testCase.Validator(res, t)
// Read onto a pointer
n, err = new(int64), new(error)
res = ReadBinaryPtr(instancePtr, bytes.NewReader(data), n, err)
if *err != nil {
t.Fatalf("Failed to read into instance: %v", *err)
}
if res != instancePtr {
t.Errorf("Expected pointer to pass through")
}
// Validate object
testCase.Validator(reflect.ValueOf(res).Elem().Interface(), t)
}
}
func TestJSON(t *testing.T) {
for i, testCase := range testCases {
log.Notice(fmt.Sprintf("Running test case %v", i))
// Construct an object
o := testCase.Constructor()
// Write the object
data := JSONBytes(o)
t.Logf("JSON: %v", string(data))
instance, instancePtr := testCase.Instantiator()
// Read onto a struct
err := new(error)
res := ReadJSON(instance, data, err)
if *err != nil {
t.Fatalf("Failed to read cat: %v", *err)
}
// Validate object
testCase.Validator(res, t)
// Read onto a pointer
res = ReadJSON(instancePtr, data, err)
if *err != nil {
t.Fatalf("Failed to read cat: %v", *err)
}
if res != instancePtr {
t.Errorf("Expected pointer to pass through")
}
// Validate object
testCase.Validator(reflect.ValueOf(res).Elem().Interface(), t)
}
}
//------------------------------------------------------------------------------
type Foo struct {
FieldA string `json:"fieldA"` // json field name is "fieldA"
FieldB string // json field name is "FieldB"
fieldC string // not exported, not serialized.
}
func TestJSONFieldNames(t *testing.T) {
for i := 0; i < 20; i++ { // Try to ensure deterministic success.
foo := Foo{"a", "b", "c"}
stringified := string(JSONBytes(foo))
expected := `{"fieldA":"a","FieldB":"b"}`
if stringified != expected {
t.Fatalf("JSONFieldNames error: expected %v, got %v",
expected, stringified)
}
}
}
//------------------------------------------------------------------------------
func TestBadAlloc(t *testing.T) {
n, err := new(int64), new(error)
instance := new([]byte)
data := RandBytes(100 * 1024)
b := new(bytes.Buffer)
// this slice of data claims to be much bigger than it really is
WriteUvarint(uint(10000000000000000), b, n, err)
b.Write(data)
res := ReadBinary(instance, b, n, err)
fmt.Println(res, *err)
}
//------------------------------------------------------------------------------
type SimpleArray [5]byte
func TestSimpleArray(t *testing.T) {
var foo SimpleArray
// Type of pointer to array
rt := reflect.TypeOf(&foo)
fmt.Printf("rt: %v\n", rt) // *binary.SimpleArray
// Type of array itself.
// NOTE: normally this is acquired through other means
// like introspecting on method signatures, or struct fields.
rte := rt.Elem()
fmt.Printf("rte: %v\n", rte) // binary.SimpleArray
// Get a new pointer to the array
// NOTE: calling .Interface() is to get the actual value,
// instead of reflection values.
ptr := reflect.New(rte).Interface()
fmt.Printf("ptr: %v\n", ptr) // &[0 0 0 0 0]
// Make a simple int aray
fooArray := SimpleArray([5]byte{1, 10, 50, 100, 200})
fooBytes := BinaryBytes(fooArray)
fooReader := bytes.NewReader(fooBytes)
// Now you can read it.
n, err := new(int64), new(error)
it := ReadBinary(foo, fooReader, n, err).(SimpleArray)
if !bytes.Equal(it[:], fooArray[:]) {
t.Errorf("Expected %v but got %v", fooArray, it)
}
}