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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build js,wasm
package js_test
import (
"fmt"
"math"
"syscall/js"
"testing"
)
var dummys = js.Global().Call("eval", `({
someBool: true,
someString: "abc\u1234",
someInt: 42,
someFloat: 42.123,
someArray: [41, 42, 43],
add: function(a, b) {
return a + b;
},
NaN: NaN,
})`)
func TestBool(t *testing.T) {
want := true
o := dummys.Get("someBool")
if got := o.Bool(); got != want {
t.Errorf("got %#v, want %#v", got, want)
}
dummys.Set("otherBool", want)
if got := dummys.Get("otherBool").Bool(); got != want {
t.Errorf("got %#v, want %#v", got, want)
}
if dummys.Get("someBool") != dummys.Get("someBool") {
t.Errorf("same value not equal")
}
}
func TestString(t *testing.T) {
want := "abc\u1234"
o := dummys.Get("someString")
if got := o.String(); got != want {
t.Errorf("got %#v, want %#v", got, want)
}
dummys.Set("otherString", want)
if got := dummys.Get("otherString").String(); got != want {
t.Errorf("got %#v, want %#v", got, want)
}
if dummys.Get("someString") != dummys.Get("someString") {
t.Errorf("same value not equal")
}
wantInt := "42"
o = dummys.Get("someInt")
if got := o.String(); got != wantInt {
t.Errorf("got %#v, want %#v", got, wantInt)
}
}
func TestInt(t *testing.T) {
want := 42
o := dummys.Get("someInt")
if got := o.Int(); got != want {
t.Errorf("got %#v, want %#v", got, want)
}
dummys.Set("otherInt", want)
if got := dummys.Get("otherInt").Int(); got != want {
t.Errorf("got %#v, want %#v", got, want)
}
if dummys.Get("someInt") != dummys.Get("someInt") {
t.Errorf("same value not equal")
}
}
func TestIntConversion(t *testing.T) {
testIntConversion(t, 0)
testIntConversion(t, 1)
testIntConversion(t, -1)
testIntConversion(t, 1<<20)
testIntConversion(t, -1<<20)
testIntConversion(t, 1<<40)
testIntConversion(t, -1<<40)
testIntConversion(t, 1<<60)
testIntConversion(t, -1<<60)
}
func testIntConversion(t *testing.T, want int) {
if got := js.ValueOf(want).Int(); got != want {
t.Errorf("got %#v, want %#v", got, want)
}
}
func TestFloat(t *testing.T) {
want := 42.123
o := dummys.Get("someFloat")
if got := o.Float(); got != want {
t.Errorf("got %#v, want %#v", got, want)
}
dummys.Set("otherFloat", want)
if got := dummys.Get("otherFloat").Float(); got != want {
t.Errorf("got %#v, want %#v", got, want)
}
if dummys.Get("someFloat") != dummys.Get("someFloat") {
t.Errorf("same value not equal")
}
}
func TestObject(t *testing.T) {
if dummys.Get("someArray") != dummys.Get("someArray") {
t.Errorf("same value not equal")
}
// An object and its prototype should not be equal.
proto := js.Global().Get("Object").Get("prototype")
o := js.Global().Call("eval", "new Object()")
if proto == o {
t.Errorf("object equals to its prototype")
}
}
func TestFrozenObject(t *testing.T) {
o := js.Global().Call("eval", "(function () { let o = new Object(); o.field = 5; Object.freeze(o); return o; })()")
want := 5
if got := o.Get("field").Int(); want != got {
t.Errorf("got %#v, want %#v", got, want)
}
}
func TestTypedArrayOf(t *testing.T) {
testTypedArrayOf(t, "[]int8", []int8{0, -42, 0}, -42)
testTypedArrayOf(t, "[]int16", []int16{0, -42, 0}, -42)
testTypedArrayOf(t, "[]int32", []int32{0, -42, 0}, -42)
testTypedArrayOf(t, "[]uint8", []uint8{0, 42, 0}, 42)
testTypedArrayOf(t, "[]uint16", []uint16{0, 42, 0}, 42)
testTypedArrayOf(t, "[]uint32", []uint32{0, 42, 0}, 42)
testTypedArrayOf(t, "[]float32", []float32{0, -42.5, 0}, -42.5)
testTypedArrayOf(t, "[]float64", []float64{0, -42.5, 0}, -42.5)
}
func testTypedArrayOf(t *testing.T, name string, slice interface{}, want float64) {
t.Run(name, func(t *testing.T) {
a := js.TypedArrayOf(slice)
got := a.Index(1).Float()
a.Release()
if got != want {
t.Errorf("got %#v, want %#v", got, want)
}
})
}
func TestNaN(t *testing.T) {
want := js.ValueOf(math.NaN())
got := dummys.Get("NaN")
if got != want {
t.Errorf("got %#v, want %#v", got, want)
}
}
func TestUndefined(t *testing.T) {
dummys.Set("test", js.Undefined())
if dummys == js.Undefined() || dummys.Get("test") != js.Undefined() || dummys.Get("xyz") != js.Undefined() {
t.Errorf("js.Undefined expected")
}
}
func TestNull(t *testing.T) {
dummys.Set("test1", nil)
dummys.Set("test2", js.Null())
if dummys == js.Null() || dummys.Get("test1") != js.Null() || dummys.Get("test2") != js.Null() {
t.Errorf("js.Null expected")
}
}
func TestLength(t *testing.T) {
if got := dummys.Get("someArray").Length(); got != 3 {
t.Errorf("got %#v, want %#v", got, 3)
}
}
func TestIndex(t *testing.T) {
if got := dummys.Get("someArray").Index(1).Int(); got != 42 {
t.Errorf("got %#v, want %#v", got, 42)
}
}
func TestSetIndex(t *testing.T) {
dummys.Get("someArray").SetIndex(2, 99)
if got := dummys.Get("someArray").Index(2).Int(); got != 99 {
t.Errorf("got %#v, want %#v", got, 99)
}
}
func TestCall(t *testing.T) {
var i int64 = 40
if got := dummys.Call("add", i, 2).Int(); got != 42 {
t.Errorf("got %#v, want %#v", got, 42)
}
if got := dummys.Call("add", js.Global().Call("eval", "40"), 2).Int(); got != 42 {
t.Errorf("got %#v, want %#v", got, 42)
}
}
func TestInvoke(t *testing.T) {
var i int64 = 40
if got := dummys.Get("add").Invoke(i, 2).Int(); got != 42 {
t.Errorf("got %#v, want %#v", got, 42)
}
}
func TestNew(t *testing.T) {
if got := js.Global().Get("Array").New(42).Length(); got != 42 {
t.Errorf("got %#v, want %#v", got, 42)
}
}
func TestInstanceOf(t *testing.T) {
someArray := js.Global().Get("Array").New()
if got, want := someArray.InstanceOf(js.Global().Get("Array")), true; got != want {
t.Errorf("got %#v, want %#v", got, want)
}
if got, want := someArray.InstanceOf(js.Global().Get("Function")), false; got != want {
t.Errorf("got %#v, want %#v", got, want)
}
}
func TestType(t *testing.T) {
if got, want := js.Undefined().Type(), js.TypeUndefined; got != want {
t.Errorf("got %s, want %s", got, want)
}
if got, want := js.Null().Type(), js.TypeNull; got != want {
t.Errorf("got %s, want %s", got, want)
}
if got, want := js.ValueOf(true).Type(), js.TypeBoolean; got != want {
t.Errorf("got %s, want %s", got, want)
}
if got, want := js.ValueOf(42).Type(), js.TypeNumber; got != want {
t.Errorf("got %s, want %s", got, want)
}
if got, want := js.ValueOf("test").Type(), js.TypeString; got != want {
t.Errorf("got %s, want %s", got, want)
}
if got, want := js.Global().Get("Symbol").Invoke("test").Type(), js.TypeSymbol; got != want {
t.Errorf("got %s, want %s", got, want)
}
if got, want := js.Global().Get("Array").New().Type(), js.TypeObject; got != want {
t.Errorf("got %s, want %s", got, want)
}
if got, want := js.Global().Get("Array").Type(), js.TypeFunction; got != want {
t.Errorf("got %s, want %s", got, want)
}
}
type object = map[string]interface{}
type array = []interface{}
func TestValueOf(t *testing.T) {
a := js.ValueOf(array{0, array{0, 42, 0}, 0})
if got := a.Index(1).Index(1).Int(); got != 42 {
t.Errorf("got %v, want %v", got, 42)
}
o := js.ValueOf(object{"x": object{"y": 42}})
if got := o.Get("x").Get("y").Int(); got != 42 {
t.Errorf("got %v, want %v", got, 42)
}
}
func TestCallback(t *testing.T) {
c := make(chan struct{})
cb := js.NewCallback(func(args []js.Value) {
if got := args[0].Int(); got != 42 {
t.Errorf("got %#v, want %#v", got, 42)
}
c <- struct{}{}
})
defer cb.Release()
js.Global().Call("setTimeout", cb, 0, 42)
<-c
}
func TestEventCallback(t *testing.T) {
for _, name := range []string{"preventDefault", "stopPropagation", "stopImmediatePropagation"} {
c := make(chan struct{})
var flags js.EventCallbackFlag
switch name {
case "preventDefault":
flags = js.PreventDefault
case "stopPropagation":
flags = js.StopPropagation
case "stopImmediatePropagation":
flags = js.StopImmediatePropagation
}
cb := js.NewEventCallback(flags, func(event js.Value) {
c <- struct{}{}
})
defer cb.Release()
event := js.Global().Call("eval", fmt.Sprintf("({ called: false, %s: function() { this.called = true; } })", name))
cb.Invoke(event)
if !event.Get("called").Bool() {
t.Errorf("%s not called", name)
}
<-c
}
}
func ExampleNewCallback() {
var cb js.Callback
cb = js.NewCallback(func(args []js.Value) {
fmt.Println("button clicked")
cb.Release() // release the callback if the button will not be clicked again
})
js.Global().Get("document").Call("getElementById", "myButton").Call("addEventListener", "click", cb)
}
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