Adding upstream version 1.16.10.upstream/1.16.10upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 604 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..5fc9107
--- /dev/null
+++ b/src/syscall/js/js_test.go
@@ -0,0 +1,604 @@
+// 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
+
+// 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),
+})`)
+
+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]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 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) interface{} {
+		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) interface{} {
+		cb2 := js.FuncOf(func(this js.Value, args []js.Value) interface{} {
+			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) interface{} {
+		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) interface{} {
+		return nil
+	})
+	f.Invoke()
+}
+
+func ExampleFuncOf() {
+	var cb js.Func
+	cb = js.FuncOf(func(this js.Value, args []js.Value) interface{} {
+		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) interface{} {
+		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())
+	}
+}