summaryrefslogtreecommitdiffstats
path: root/src/syscall/js/js_test.go
diff options
context:
space:
mode:
Diffstat (limited to 'src/syscall/js/js_test.go')
-rw-r--r--src/syscall/js/js_test.go616
1 files changed, 616 insertions, 0 deletions
diff --git a/src/syscall/js/js_test.go b/src/syscall/js/js_test.go
new file mode 100644
index 0000000..8823421
--- /dev/null
+++ b/src/syscall/js/js_test.go
@@ -0,0 +1,616 @@
+// 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.
+
+//go:build js && wasm
+
+// To run these tests:
+//
+// - Install Node
+// - Add /path/to/go/misc/wasm to your $PATH (so that "go test" can find
+// "go_js_wasm_exec").
+// - GOOS=js GOARCH=wasm go test
+//
+// See -exec in "go help test", and "go help run" for details.
+
+package js_test
+
+import (
+ "fmt"
+ "math"
+ "runtime"
+ "syscall/js"
+ "testing"
+)
+
+var dummys = js.Global().Call("eval", `({
+ someBool: true,
+ someString: "abc\u1234",
+ someInt: 42,
+ someFloat: 42.123,
+ someArray: [41, 42, 43],
+ someDate: new Date(),
+ add: function(a, b) {
+ return a + b;
+ },
+ zero: 0,
+ stringZero: "0",
+ NaN: NaN,
+ emptyObj: {},
+ emptyArray: [],
+ Infinity: Infinity,
+ NegInfinity: -Infinity,
+ objNumber0: new Number(0),
+ objBooleanFalse: new Boolean(false),
+})`)
+
+//go:wasmimport _gotest add
+func testAdd(uint32, uint32) uint32
+
+func TestWasmImport(t *testing.T) {
+ a := uint32(3)
+ b := uint32(5)
+ want := a + b
+ if got := testAdd(a, b); got != want {
+ t.Errorf("got %v, want %v", got, want)
+ }
+}
+
+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").Equal(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").Equal(dummys.Get("someString")) {
+ t.Errorf("same value not equal")
+ }
+
+ if got, want := js.Undefined().String(), "<undefined>"; got != want {
+ t.Errorf("got %#v, want %#v", got, want)
+ }
+ if got, want := js.Null().String(), "<null>"; got != want {
+ t.Errorf("got %#v, want %#v", got, want)
+ }
+ if got, want := js.ValueOf(true).String(), "<boolean: true>"; got != want {
+ t.Errorf("got %#v, want %#v", got, want)
+ }
+ if got, want := js.ValueOf(42.5).String(), "<number: 42.5>"; got != want {
+ t.Errorf("got %#v, want %#v", got, want)
+ }
+ if got, want := js.Global().Call("Symbol").String(), "<symbol>"; got != want {
+ t.Errorf("got %#v, want %#v", got, want)
+ }
+ if got, want := js.Global().String(), "<object>"; got != want {
+ t.Errorf("got %#v, want %#v", got, want)
+ }
+ if got, want := js.Global().Get("setTimeout").String(), "<function>"; got != want {
+ t.Errorf("got %#v, want %#v", got, want)
+ }
+}
+
+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").Equal(dummys.Get("someInt")) {
+ t.Errorf("same value not equal")
+ }
+ if got := dummys.Get("zero").Int(); got != 0 {
+ t.Errorf("got %#v, want %#v", got, 0)
+ }
+}
+
+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").Equal(dummys.Get("someFloat")) {
+ t.Errorf("same value not equal")
+ }
+}
+
+func TestObject(t *testing.T) {
+ if !dummys.Get("someArray").Equal(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.Equal(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 TestEqual(t *testing.T) {
+ if !dummys.Get("someFloat").Equal(dummys.Get("someFloat")) {
+ t.Errorf("same float is not equal")
+ }
+ if !dummys.Get("emptyObj").Equal(dummys.Get("emptyObj")) {
+ t.Errorf("same object is not equal")
+ }
+ if dummys.Get("someFloat").Equal(dummys.Get("someInt")) {
+ t.Errorf("different values are not unequal")
+ }
+}
+
+func TestNaN(t *testing.T) {
+ if !dummys.Get("NaN").IsNaN() {
+ t.Errorf("JS NaN is not NaN")
+ }
+ if !js.ValueOf(math.NaN()).IsNaN() {
+ t.Errorf("Go NaN is not NaN")
+ }
+ if dummys.Get("NaN").Equal(dummys.Get("NaN")) {
+ t.Errorf("NaN is equal to NaN")
+ }
+}
+
+func TestUndefined(t *testing.T) {
+ if !js.Undefined().IsUndefined() {
+ t.Errorf("undefined is not undefined")
+ }
+ if !js.Undefined().Equal(js.Undefined()) {
+ t.Errorf("undefined is not equal to undefined")
+ }
+ if dummys.IsUndefined() {
+ t.Errorf("object is undefined")
+ }
+ if js.Undefined().IsNull() {
+ t.Errorf("undefined is null")
+ }
+ if dummys.Set("test", js.Undefined()); !dummys.Get("test").IsUndefined() {
+ t.Errorf("could not set undefined")
+ }
+}
+
+func TestNull(t *testing.T) {
+ if !js.Null().IsNull() {
+ t.Errorf("null is not null")
+ }
+ if !js.Null().Equal(js.Null()) {
+ t.Errorf("null is not equal to null")
+ }
+ if dummys.IsNull() {
+ t.Errorf("object is null")
+ }
+ if js.Null().IsUndefined() {
+ t.Errorf("null is undefined")
+ }
+ if dummys.Set("test", js.Null()); !dummys.Get("test").IsNull() {
+ t.Errorf("could not set null")
+ }
+ if dummys.Set("test", nil); !dummys.Get("test").IsNull() {
+ t.Errorf("could not set nil")
+ }
+}
+
+func TestLength(t *testing.T) {
+ if got := dummys.Get("someArray").Length(); got != 3 {
+ t.Errorf("got %#v, want %#v", got, 3)
+ }
+}
+
+func TestGet(t *testing.T) {
+ // positive cases get tested per type
+
+ expectValueError(t, func() {
+ dummys.Get("zero").Get("badField")
+ })
+}
+
+func TestSet(t *testing.T) {
+ // positive cases get tested per type
+
+ expectValueError(t, func() {
+ dummys.Get("zero").Set("badField", 42)
+ })
+}
+
+func TestDelete(t *testing.T) {
+ dummys.Set("test", 42)
+ dummys.Delete("test")
+ if dummys.Call("hasOwnProperty", "test").Bool() {
+ t.Errorf("property still exists")
+ }
+
+ expectValueError(t, func() {
+ dummys.Get("zero").Delete("badField")
+ })
+}
+
+func TestIndex(t *testing.T) {
+ if got := dummys.Get("someArray").Index(1).Int(); got != 42 {
+ t.Errorf("got %#v, want %#v", got, 42)
+ }
+
+ expectValueError(t, func() {
+ dummys.Get("zero").Index(1)
+ })
+}
+
+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)
+ }
+
+ expectValueError(t, func() {
+ dummys.Get("zero").SetIndex(2, 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)
+ }
+
+ expectPanic(t, func() {
+ dummys.Call("zero")
+ })
+ expectValueError(t, func() {
+ dummys.Get("zero").Call("badMethod")
+ })
+}
+
+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)
+ }
+
+ expectValueError(t, func() {
+ dummys.Get("zero").Invoke()
+ })
+}
+
+func TestNew(t *testing.T) {
+ if got := js.Global().Get("Array").New(42).Length(); got != 42 {
+ t.Errorf("got %#v, want %#v", got, 42)
+ }
+
+ expectValueError(t, func() {
+ dummys.Get("zero").New()
+ })
+}
+
+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(0).Type(), js.TypeNumber; 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]any
+type array = []any
+
+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 TestZeroValue(t *testing.T) {
+ var v js.Value
+ if !v.IsUndefined() {
+ t.Error("zero js.Value is not js.Undefined()")
+ }
+}
+
+func TestFuncOf(t *testing.T) {
+ c := make(chan struct{})
+ cb := js.FuncOf(func(this js.Value, args []js.Value) any {
+ if got := args[0].Int(); got != 42 {
+ t.Errorf("got %#v, want %#v", got, 42)
+ }
+ c <- struct{}{}
+ return nil
+ })
+ defer cb.Release()
+ js.Global().Call("setTimeout", cb, 0, 42)
+ <-c
+}
+
+func TestInvokeFunction(t *testing.T) {
+ called := false
+ cb := js.FuncOf(func(this js.Value, args []js.Value) any {
+ cb2 := js.FuncOf(func(this js.Value, args []js.Value) any {
+ called = true
+ return 42
+ })
+ defer cb2.Release()
+ return cb2.Invoke()
+ })
+ defer cb.Release()
+ if got := cb.Invoke().Int(); got != 42 {
+ t.Errorf("got %#v, want %#v", got, 42)
+ }
+ if !called {
+ t.Error("function not called")
+ }
+}
+
+func TestInterleavedFunctions(t *testing.T) {
+ c1 := make(chan struct{})
+ c2 := make(chan struct{})
+
+ js.Global().Get("setTimeout").Invoke(js.FuncOf(func(this js.Value, args []js.Value) any {
+ c1 <- struct{}{}
+ <-c2
+ return nil
+ }), 0)
+
+ <-c1
+ c2 <- struct{}{}
+ // this goroutine is running, but the callback of setTimeout did not return yet, invoke another function now
+ f := js.FuncOf(func(this js.Value, args []js.Value) any {
+ return nil
+ })
+ f.Invoke()
+}
+
+func ExampleFuncOf() {
+ var cb js.Func
+ cb = js.FuncOf(func(this js.Value, args []js.Value) any {
+ fmt.Println("button clicked")
+ cb.Release() // release the function if the button will not be clicked again
+ return nil
+ })
+ js.Global().Get("document").Call("getElementById", "myButton").Call("addEventListener", "click", cb)
+}
+
+// See
+// - https://developer.mozilla.org/en-US/docs/Glossary/Truthy
+// - https://stackoverflow.com/questions/19839952/all-falsey-values-in-javascript/19839953#19839953
+// - http://www.ecma-international.org/ecma-262/5.1/#sec-9.2
+func TestTruthy(t *testing.T) {
+ want := true
+ for _, key := range []string{
+ "someBool", "someString", "someInt", "someFloat", "someArray", "someDate",
+ "stringZero", // "0" is truthy
+ "add", // functions are truthy
+ "emptyObj", "emptyArray", "Infinity", "NegInfinity",
+ // All objects are truthy, even if they're Number(0) or Boolean(false).
+ "objNumber0", "objBooleanFalse",
+ } {
+ if got := dummys.Get(key).Truthy(); got != want {
+ t.Errorf("%s: got %#v, want %#v", key, got, want)
+ }
+ }
+
+ want = false
+ if got := dummys.Get("zero").Truthy(); got != want {
+ t.Errorf("got %#v, want %#v", got, want)
+ }
+ if got := dummys.Get("NaN").Truthy(); got != want {
+ t.Errorf("got %#v, want %#v", got, want)
+ }
+ if got := js.ValueOf("").Truthy(); got != want {
+ t.Errorf("got %#v, want %#v", got, want)
+ }
+ if got := js.Null().Truthy(); got != want {
+ t.Errorf("got %#v, want %#v", got, want)
+ }
+ if got := js.Undefined().Truthy(); got != want {
+ t.Errorf("got %#v, want %#v", got, want)
+ }
+}
+
+func expectValueError(t *testing.T, fn func()) {
+ defer func() {
+ err := recover()
+ if _, ok := err.(*js.ValueError); !ok {
+ t.Errorf("expected *js.ValueError, got %T", err)
+ }
+ }()
+ fn()
+}
+
+func expectPanic(t *testing.T, fn func()) {
+ defer func() {
+ err := recover()
+ if err == nil {
+ t.Errorf("expected panic")
+ }
+ }()
+ fn()
+}
+
+var copyTests = []struct {
+ srcLen int
+ dstLen int
+ copyLen int
+}{
+ {5, 3, 3},
+ {3, 5, 3},
+ {0, 0, 0},
+}
+
+func TestCopyBytesToGo(t *testing.T) {
+ for _, tt := range copyTests {
+ t.Run(fmt.Sprintf("%d-to-%d", tt.srcLen, tt.dstLen), func(t *testing.T) {
+ src := js.Global().Get("Uint8Array").New(tt.srcLen)
+ if tt.srcLen >= 2 {
+ src.SetIndex(1, 42)
+ }
+ dst := make([]byte, tt.dstLen)
+
+ if got, want := js.CopyBytesToGo(dst, src), tt.copyLen; got != want {
+ t.Errorf("copied %d, want %d", got, want)
+ }
+ if tt.dstLen >= 2 {
+ if got, want := int(dst[1]), 42; got != want {
+ t.Errorf("got %d, want %d", got, want)
+ }
+ }
+ })
+ }
+}
+
+func TestCopyBytesToJS(t *testing.T) {
+ for _, tt := range copyTests {
+ t.Run(fmt.Sprintf("%d-to-%d", tt.srcLen, tt.dstLen), func(t *testing.T) {
+ src := make([]byte, tt.srcLen)
+ if tt.srcLen >= 2 {
+ src[1] = 42
+ }
+ dst := js.Global().Get("Uint8Array").New(tt.dstLen)
+
+ if got, want := js.CopyBytesToJS(dst, src), tt.copyLen; got != want {
+ t.Errorf("copied %d, want %d", got, want)
+ }
+ if tt.dstLen >= 2 {
+ if got, want := dst.Index(1).Int(), 42; got != want {
+ t.Errorf("got %d, want %d", got, want)
+ }
+ }
+ })
+ }
+}
+
+func TestGarbageCollection(t *testing.T) {
+ before := js.JSGo.Get("_values").Length()
+ for i := 0; i < 1000; i++ {
+ _ = js.Global().Get("Object").New().Call("toString").String()
+ runtime.GC()
+ }
+ after := js.JSGo.Get("_values").Length()
+ if after-before > 500 {
+ t.Errorf("garbage collection ineffective")
+ }
+}
+
+// BenchmarkDOM is a simple benchmark which emulates a webapp making DOM operations.
+// It creates a div, and sets its id. Then searches by that id and sets some data.
+// Finally it removes that div.
+func BenchmarkDOM(b *testing.B) {
+ document := js.Global().Get("document")
+ if document.IsUndefined() {
+ b.Skip("Not a browser environment. Skipping.")
+ }
+ const data = "someString"
+ for i := 0; i < b.N; i++ {
+ div := document.Call("createElement", "div")
+ div.Call("setAttribute", "id", "myDiv")
+ document.Get("body").Call("appendChild", div)
+ myDiv := document.Call("getElementById", "myDiv")
+ myDiv.Set("innerHTML", data)
+
+ if got, want := myDiv.Get("innerHTML").String(), data; got != want {
+ b.Errorf("got %s, want %s", got, want)
+ }
+ document.Get("body").Call("removeChild", div)
+ }
+}
+
+func TestGlobal(t *testing.T) {
+ ident := js.FuncOf(func(this js.Value, args []js.Value) any {
+ return args[0]
+ })
+ defer ident.Release()
+
+ if got := ident.Invoke(js.Global()); !got.Equal(js.Global()) {
+ t.Errorf("got %#v, want %#v", got, js.Global())
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-03 07:07:56 +0000