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value_test.go
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value_test.go
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// Copyright 2019 Roger Chapman and the v8go contributors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package v8go_test
import (
"bytes"
"fmt"
"math"
"math/big"
"reflect"
"runtime"
"testing"
v8 "github.com/BloomrIO/v8go"
)
func TestValueNewBaseCases(t *testing.T) {
t.Parallel()
if _, err := v8.NewValue(nil, ""); err == nil {
t.Error("expected error, but got <nil>")
}
iso := v8.NewIsolate()
defer iso.Dispose()
if _, err := v8.NewValue(iso, nil); err == nil {
t.Error("expected error, but got <nil>")
}
if _, err := v8.NewValue(iso, struct{}{}); err == nil {
t.Error("expected error, but got <nil>")
}
}
func TestValueFormatting(t *testing.T) {
t.Parallel()
ctx := v8.NewContext(nil)
defer ctx.Isolate().Dispose()
defer ctx.Close()
tests := [...]struct {
source string
defaultVerb string
defaultVerbFlag string
stringVerb string
quoteVerb string
}{
{"new Object()", "[object Object]", "#<Object>", "[object Object]", `"[object Object]"`},
}
for _, tt := range tests {
tt := tt
t.Run(tt.source, func(t *testing.T) {
val, _ := ctx.RunScript(tt.source, "test.js")
if s := fmt.Sprintf("%v", val); s != tt.defaultVerb {
t.Errorf("incorrect format for %%v: %s", s)
}
if s := fmt.Sprintf("%+v", val); s != tt.defaultVerbFlag {
t.Errorf("incorrect format for %%+v: %s", s)
}
if s := fmt.Sprintf("%s", val); s != tt.stringVerb {
t.Errorf("incorrect format for %%s: %s", s)
}
if s := fmt.Sprintf("%q", val); s != tt.quoteVerb {
t.Errorf("incorrect format for %%q: %s", s)
}
})
}
}
func TestValueString(t *testing.T) {
t.Parallel()
ctx := v8.NewContext(nil)
defer ctx.Isolate().Dispose()
defer ctx.Close()
tests := [...]struct {
name string
source string
out string
}{
{"Number", `13 * 2`, "26"},
{"String", `"string"`, "string"},
{"String with null character and non-latin unicode", `"a\x00Ω"`, "a\x00Ω"},
{"Object", `let obj = {}; obj`, "[object Object]"},
{"Function", `let fn = function(){}; fn`, "function(){}"},
}
for _, tt := range tests {
tt := tt
t.Run(tt.name, func(t *testing.T) {
result, _ := ctx.RunScript(tt.source, "test.js")
str := result.String()
if str != tt.out {
t.Errorf("unexpected result: expected %q, got %q", tt.out, str)
}
})
}
}
func TestNewValue(t *testing.T) {
t.Parallel()
ctx := v8.NewContext(nil)
iso := ctx.Isolate()
defer iso.Dispose()
defer ctx.Close()
tests := []struct {
name string
input interface{}
predicate string
}{
{"string", "s\x00s\x00", `str => str === "s\x00s\x00"`},
{"int32", int32(36), `int => int === 36`},
{"bool", true, `b => b === true`},
}
for _, tt := range tests {
tt := tt
t.Run(tt.name, func(t *testing.T) {
val, err := ctx.RunScript(tt.predicate, "test.js")
if err != nil {
t.Fatal(err)
}
fn, err := val.AsFunction()
if err != nil {
t.Fatal(err)
}
jsVal, err := v8.NewValue(iso, tt.input)
if err != nil {
t.Fatal(err)
}
result, err := fn.Call(ctx.Global(), jsVal)
if err != nil {
t.Fatal(err)
}
if !result.Boolean() {
t.Fatal("unexpected result: expected true, got false")
}
})
}
}
func TestValueDetailString(t *testing.T) {
t.Parallel()
ctx := v8.NewContext(nil)
defer ctx.Isolate().Dispose()
defer ctx.Close()
tests := [...]struct {
name string
source string
out string
}{
{"Number", `13 * 2`, "26"},
{"String", `"a string"`, "a string"},
{"Object", `let obj = {}; obj`, "#<Object>"},
{"Function", `let fn = function(){}; fn`, "function(){}"},
}
for _, tt := range tests {
tt := tt
t.Run(tt.name, func(t *testing.T) {
result, _ := ctx.RunScript(tt.source, "test.js")
str := result.DetailString()
if str != tt.out {
t.Errorf("unexpected result: expected %q, got %q", tt.out, str)
}
})
}
}
func TestValueBoolean(t *testing.T) {
t.Parallel()
ctx := v8.NewContext(nil)
defer ctx.Isolate().Dispose()
defer ctx.Close()
tests := [...]struct {
source string
out bool
}{
{"true", true},
{"false", false},
{"1", true},
{"0", false},
{"null", false},
{"undefined", false},
{"''", false},
{"'foo'", true},
{"() => {}", true},
{"{}", false},
{"{foo:'bar'}", true},
}
for _, tt := range tests {
tt := tt
t.Run(tt.source, func(t *testing.T) {
val, _ := ctx.RunScript(tt.source, "test.js")
if b := val.Boolean(); b != tt.out {
t.Errorf("unexpected value: expected %v, got %v", tt.out, b)
}
})
}
}
func TestValueConstants(t *testing.T) {
t.Parallel()
iso := v8.NewIsolate()
defer iso.Dispose()
ctx := v8.NewContext(iso)
defer ctx.Close()
tests := [...]struct {
source string
value *v8.Value
same bool
}{
{"undefined", v8.Undefined(iso), true},
{"null", v8.Null(iso), true},
{"undefined", v8.Null(iso), false},
}
for _, tt := range tests {
tt := tt
val, err := ctx.RunScript(tt.source, "test.js")
fatalIf(t, err)
if tt.value.SameValue(val) != tt.same {
t.Errorf("SameValue on JS `%s` and V8 value %+v didn't return %v",
tt.source, tt.value, tt.same)
}
}
}
func TestValueArrayIndex(t *testing.T) {
t.Parallel()
ctx := v8.NewContext(nil)
defer ctx.Isolate().Dispose()
defer ctx.Close()
tests := [...]struct {
source string
idx uint32
ok bool
}{
{"1", 1, true},
{"0", 0, true},
{"-1", 0, false},
{"'1'", 1, true},
{"'-1'", 0, false},
{"'a'", 0, false},
{"[1]", 1, true},
{"['1']", 1, true},
{"[1, 1]", 0, false},
{"{}", 0, false},
}
for _, tt := range tests {
tt := tt
t.Run(tt.source, func(t *testing.T) {
val, _ := ctx.RunScript(tt.source, "test.js")
idx, ok := val.ArrayIndex()
if ok != tt.ok {
t.Errorf("unexpected ok: expected %v, got %v", tt.ok, ok)
}
if idx != tt.idx {
t.Errorf("unexpected array index: expected %v, got %v", tt.idx, idx)
}
})
}
}
func TestValueInt32(t *testing.T) {
t.Parallel()
ctx := v8.NewContext(nil)
defer ctx.Isolate().Dispose()
defer ctx.Close()
tests := [...]struct {
source string
expected int32
}{
{"0", 0},
{"1", 1},
{"-1", -1},
{"'1'", 1},
{"1.5", 1},
{"-1.5", -1},
{"'a'", 0},
{"[1]", 1},
{"[1,1]", 0},
{"Infinity", 0},
{"Number.MAX_SAFE_INTEGER", -1},
{"Number.MIN_SAFE_INTEGER", 1},
{"Number.NaN", 0},
{"2_147_483_647", 1<<31 - 1},
{"-2_147_483_648", -1 << 31},
{"2_147_483_648", -1 << 31}, // overflow
}
for _, tt := range tests {
tt := tt
t.Run(tt.source, func(t *testing.T) {
val, _ := ctx.RunScript(tt.source, "test.js")
if i32 := val.Int32(); i32 != tt.expected {
t.Errorf("unexpected value: expected %v, got %v", tt.expected, i32)
}
})
}
}
func TestValueInteger(t *testing.T) {
t.Parallel()
ctx := v8.NewContext(nil)
defer ctx.Isolate().Dispose()
defer ctx.Close()
tests := [...]struct {
source string
expected int64
}{
{"0", 0},
{"1", 1},
{"-1", -1},
{"'1'", 1},
{"1.5", 1},
{"-1.5", -1},
{"'a'", 0},
{"[1]", 1},
{"[1,1]", 0},
{"Infinity", 1<<63 - 1},
{"Number.MAX_SAFE_INTEGER", 1<<53 - 1},
{"Number.MIN_SAFE_INTEGER", -(1<<53 - 1)},
{"Number.NaN", 0},
{"9_007_199_254_740_991", 1<<53 - 1},
{"-9_007_199_254_740_991", -(1<<53 - 1)},
{"9_223_372_036_854_775_810", 1<<63 - 1}, // does not overflow, pinned at 2^64 -1
}
for _, tt := range tests {
tt := tt
t.Run(tt.source, func(t *testing.T) {
val, _ := ctx.RunScript(tt.source, "test.js")
if i64 := val.Integer(); i64 != tt.expected {
t.Errorf("unexpected value: expected %v, got %v", tt.expected, i64)
}
})
}
}
func TestValueNumber(t *testing.T) {
t.Parallel()
ctx := v8.NewContext(nil)
defer ctx.Isolate().Dispose()
defer ctx.Close()
tests := [...]struct {
source string
expected float64
}{
{"0", 0},
{"1", 1},
{"-1", -1},
{"'1'", 1},
{"1.5", 1.5},
{"-1.5", -1.5},
{"'a'", math.NaN()},
{"[1]", 1},
{"[1,1]", math.NaN()},
{"Infinity", math.Inf(0)},
{"Number.MAX_VALUE", 1.7976931348623157e+308},
{"Number.MIN_VALUE", 5e-324},
{"Number.MAX_SAFE_INTEGER", 1<<53 - 1},
{"Number.NaN", math.NaN()},
}
for _, tt := range tests {
tt := tt
t.Run(tt.source, func(t *testing.T) {
val, _ := ctx.RunScript(tt.source, "test.js")
f64 := val.Number()
if math.IsNaN(tt.expected) {
if !math.IsNaN(f64) {
t.Errorf("unexpected value: expected NaN, got %v", f64)
}
return
}
if f64 != tt.expected {
t.Errorf("unexpected value: expected %v, got %v", tt.expected, f64)
}
})
}
}
func TestValueUint32(t *testing.T) {
t.Parallel()
ctx := v8.NewContext(nil)
defer ctx.Isolate().Dispose()
defer ctx.Close()
tests := [...]struct {
source string
expected uint32
}{
{"0", 0},
{"1", 1},
{"-1", 1<<32 - 1}, // overflow
}
for _, tt := range tests {
tt := tt
t.Run(tt.source, func(t *testing.T) {
val, _ := ctx.RunScript(tt.source, "test.js")
if u32 := val.Uint32(); u32 != tt.expected {
t.Errorf("unexpected value: expected %v, got %v", tt.expected, u32)
}
})
}
}
func TestValueBigInt(t *testing.T) {
t.Parallel()
iso := v8.NewIsolate()
defer iso.Dispose()
x, _ := new(big.Int).SetString("36893488147419099136", 10) // larger than a single word size (64bit)
tests := [...]struct {
source string
expected *big.Int
}{
{"BigInt(0)", &big.Int{}},
{"-1n", big.NewInt(-1)},
{"new BigInt(1)", nil}, // bad syntax
{"BigInt(Number.MAX_SAFE_INTEGER)", big.NewInt(1<<53 - 1)},
{"BigInt(Number.MIN_SAFE_INTEGER)", new(big.Int).Neg(big.NewInt(1<<53 - 1))},
{"BigInt(Number.MAX_SAFE_INTEGER) * 2n", big.NewInt(1<<54 - 2)},
{"BigInt(Number.MAX_SAFE_INTEGER) * 4096n", x},
}
for _, tt := range tests {
tt := tt
t.Run(tt.source, func(t *testing.T) {
ctx := v8.NewContext(iso)
defer ctx.Close()
val, _ := ctx.RunScript(tt.source, "test.js")
b := val.BigInt()
if b == nil && tt.expected != nil {
t.Errorf("uexpected <nil> value")
return
}
if b != nil && tt.expected == nil {
t.Errorf("expected <nil>, but got value: %v", b)
return
}
if b != nil && b.Cmp(tt.expected) != 0 {
t.Errorf("unexpected value: expected %v, got %v", tt.expected, b)
}
})
}
}
func TestValueObject(t *testing.T) {
t.Parallel()
ctx := v8.NewContext()
defer ctx.Isolate().Dispose()
defer ctx.Close()
val, _ := ctx.RunScript("1", "")
if _, err := val.AsObject(); err == nil {
t.Error("Expected error but got <nil>")
}
if obj := val.Object(); obj.String() != "1" {
t.Errorf("unexpected object value: %v", obj)
}
}
func TestValuePromise(t *testing.T) {
t.Parallel()
ctx := v8.NewContext()
defer ctx.Isolate().Dispose()
defer ctx.Close()
val, _ := ctx.RunScript("1", "")
if _, err := val.AsPromise(); err == nil {
t.Error("Expected error but got <nil>")
}
if _, err := ctx.RunScript("new Promise(()=>{})", ""); err != nil {
t.Errorf("Unexpected error: %v", err)
}
}
func TestValueFunction(t *testing.T) {
t.Parallel()
ctx := v8.NewContext()
defer ctx.Isolate().Dispose()
defer ctx.Close()
val, _ := ctx.RunScript("1", "")
if _, err := val.AsFunction(); err == nil {
t.Error("Expected error but got <nil>")
}
val, err := ctx.RunScript("(a, b) => { return a + b; }", "")
if err != nil {
t.Errorf("Unexpected error: %v", err)
}
if _, err := val.AsFunction(); err != nil {
t.Errorf("Expected success but got: %v", err)
}
}
func TestValueSameValue(t *testing.T) {
t.Parallel()
iso := v8.NewIsolate()
defer iso.Dispose()
ctx := v8.NewContext(iso)
defer ctx.Close()
objTempl := v8.NewObjectTemplate(iso)
obj1, err := objTempl.NewInstance(ctx)
fatalIf(t, err)
obj2, err := objTempl.NewInstance(ctx)
fatalIf(t, err)
if obj1.Value.SameValue(obj2.Value) != false {
t.Errorf("SameValue on two different values didn't return false")
}
if obj1.Value.SameValue(obj1.Value) != true {
t.Errorf("SameValue on two of the same value didn't return true")
}
}
func TestValueIsXXX(t *testing.T) {
t.Parallel()
iso := v8.NewIsolate()
defer iso.Dispose()
tests := [...]struct {
source string
assert func(*v8.Value) bool
}{
{"", (*v8.Value).IsUndefined},
{"let v; v", (*v8.Value).IsUndefined},
{"null", (*v8.Value).IsNull},
{"let v; v", (*v8.Value).IsNullOrUndefined},
{"let v = null; v", (*v8.Value).IsNullOrUndefined},
{"true", (*v8.Value).IsTrue},
{"false", (*v8.Value).IsFalse},
{"'name'", (*v8.Value).IsName},
{"Symbol()", (*v8.Value).IsName},
{`"double quote"`, (*v8.Value).IsString},
{"'single quote'", (*v8.Value).IsString},
{"`string literal`", (*v8.Value).IsString},
{"Symbol()", (*v8.Value).IsSymbol},
{"Symbol('foo')", (*v8.Value).IsSymbol},
{"() => {}", (*v8.Value).IsFunction},
{"function v() {}; v", (*v8.Value).IsFunction},
{"const v = function() {}; v", (*v8.Value).IsFunction},
{"console.log", (*v8.Value).IsFunction},
{"Object", (*v8.Value).IsFunction},
{"class Foo {}; Foo", (*v8.Value).IsFunction},
{"class Foo { bar() {} }; (new Foo()).bar", (*v8.Value).IsFunction},
{"function* v(){}; v", (*v8.Value).IsFunction},
{"async function v(){}; v", (*v8.Value).IsFunction},
{"Object()", (*v8.Value).IsObject},
{"new Object", (*v8.Value).IsObject},
{"var v = {}; v", (*v8.Value).IsObject},
{"10n", (*v8.Value).IsBigInt},
{"BigInt(1)", (*v8.Value).IsBigInt},
{"true", (*v8.Value).IsBoolean},
{"false", (*v8.Value).IsBoolean},
{"Boolean()", (*v8.Value).IsBoolean},
{"(new Boolean).valueOf()", (*v8.Value).IsBoolean},
{"1", (*v8.Value).IsNumber},
{"1.1", (*v8.Value).IsNumber},
{"1_1", (*v8.Value).IsNumber},
{".1", (*v8.Value).IsNumber},
{"2e4", (*v8.Value).IsNumber},
{"0x2", (*v8.Value).IsNumber},
{"NaN", (*v8.Value).IsNumber},
{"Infinity", (*v8.Value).IsNumber},
{"Number(1)", (*v8.Value).IsNumber},
{"(new Number()).valueOf()", (*v8.Value).IsNumber},
{"1", (*v8.Value).IsInt32},
{"-1", (*v8.Value).IsInt32},
{"1", (*v8.Value).IsUint32},
{"new Date", (*v8.Value).IsDate},
{"function foo(){ return arguments }; foo()", (*v8.Value).IsArgumentsObject},
{"Object(1n)", (*v8.Value).IsBigIntObject},
{"Object(1)", (*v8.Value).IsNumberObject},
{"new Number", (*v8.Value).IsNumberObject},
{"new String", (*v8.Value).IsStringObject},
{"Object('')", (*v8.Value).IsStringObject},
{"Object(Symbol())", (*v8.Value).IsSymbolObject},
{"Error()", (*v8.Value).IsNativeError},
{"TypeError()", (*v8.Value).IsNativeError},
{"SyntaxError()", (*v8.Value).IsNativeError},
{"/./", (*v8.Value).IsRegExp},
{"RegExp()", (*v8.Value).IsRegExp},
{"async function v(){}; v", (*v8.Value).IsAsyncFunction},
{"let v = async () => {}; v", (*v8.Value).IsAsyncFunction},
{"function* v(){}; v", (*v8.Value).IsGeneratorFunction},
{"function* v(){}; v()", (*v8.Value).IsGeneratorObject},
{"new Promise(()=>{})", (*v8.Value).IsPromise},
{"new Map", (*v8.Value).IsMap},
{"new Set", (*v8.Value).IsSet},
{"(new Map).entries()", (*v8.Value).IsMapIterator},
{"(new Set).entries()", (*v8.Value).IsSetIterator},
{"new WeakMap", (*v8.Value).IsWeakMap},
{"new WeakSet", (*v8.Value).IsWeakSet},
{"new Array", (*v8.Value).IsArray},
{"Array()", (*v8.Value).IsArray},
{"[]", (*v8.Value).IsArray},
{"new ArrayBuffer", (*v8.Value).IsArrayBuffer},
{"new Int8Array", (*v8.Value).IsArrayBufferView},
{"new Int8Array", (*v8.Value).IsTypedArray},
{"new Uint32Array", (*v8.Value).IsTypedArray},
{"new Uint8Array", (*v8.Value).IsUint8Array},
{"new Uint8ClampedArray", (*v8.Value).IsUint8ClampedArray},
{"new Int8Array", (*v8.Value).IsInt8Array},
{"new Uint16Array", (*v8.Value).IsUint16Array},
{"new Int16Array", (*v8.Value).IsInt16Array},
{"new Uint32Array", (*v8.Value).IsUint32Array},
{"new Int32Array", (*v8.Value).IsInt32Array},
{"new Float32Array", (*v8.Value).IsFloat32Array},
{"new Float64Array", (*v8.Value).IsFloat64Array},
{"new BigInt64Array", (*v8.Value).IsBigInt64Array},
{"new BigUint64Array", (*v8.Value).IsBigUint64Array},
{"new DataView(new ArrayBuffer)", (*v8.Value).IsDataView},
{"new SharedArrayBuffer", (*v8.Value).IsSharedArrayBuffer},
{"new Proxy({},{})", (*v8.Value).IsProxy},
}
for _, tt := range tests {
tt := tt
t.Run(tt.source, func(t *testing.T) {
ctx := v8.NewContext(iso)
defer ctx.Close()
val, err := ctx.RunScript(tt.source, "test.js")
if err != nil {
t.Fatalf("failed to run script: %v", err)
}
if !tt.assert(val) {
t.Errorf("value is false for %s", runtime.FuncForPC(reflect.ValueOf(tt.assert).Pointer()).Name())
}
})
}
}
func TestValueMarshalJSON(t *testing.T) {
t.Parallel()
iso := v8.NewIsolate()
defer iso.Dispose()
tests := [...]struct {
name string
val func(*v8.Context) *v8.Value
expected []byte
}{
{
"primitive",
func(ctx *v8.Context) *v8.Value {
val, _ := v8.NewValue(iso, int32(0))
return val
},
[]byte("0"),
},
{
"object",
func(ctx *v8.Context) *v8.Value {
val, _ := ctx.RunScript("let foo = {a:1, b:2}; foo", "test.js")
return val
},
[]byte(`{"a":1,"b":2}`),
},
{
"objectFunc",
func(ctx *v8.Context) *v8.Value {
val, _ := ctx.RunScript("let foo = {a:1, b:()=>{}}; foo", "test.js")
return val
},
[]byte(`{"a":1}`),
},
{
"nil",
func(ctx *v8.Context) *v8.Value { return nil },
[]byte(""),
},
}
for _, tt := range tests {
tt := tt
t.Run(tt.name, func(t *testing.T) {
ctx := v8.NewContext(iso)
defer ctx.Close()
val := tt.val(ctx)
json, _ := val.MarshalJSON()
if !bytes.Equal(json, tt.expected) {
t.Errorf("unexpected JSON value: %s", string(json))
}
})
}
}
func TestValueArrayBufferContents(t *testing.T) {
t.Parallel()
iso := v8.NewIsolate()
defer iso.Dispose()
ctx := v8.NewContext(iso)
defer ctx.Close()
val, err := ctx.RunScript(`
(()=>{
let buf = new SharedArrayBuffer(1024);
let arr = new Int8Array(buf);
arr[0] = 42;
arr[1] = 52;
return buf;
})();
`, "test.js")
if err != nil {
t.Fatalf("failed to run script: %v", err)
}
if !val.IsSharedArrayBuffer() {
t.Fatalf("expected SharedArrayBuffer value")
}
buf, cleanup, err := val.SharedArrayBufferGetContents()
if err != nil {
t.Fatalf("error getting array buffer contents: %#v", err)
}
defer cleanup()
if len(buf) != 1024 {
t.Fatalf("expected len(buf) to be 1024")
}
if buf[0] != 42 {
t.Fatalf("expected buf[0] to be 42")
}
if buf[1] != 52 {
t.Fatalf("expected buf[1] to be 52")
}
if buf[3] != 0 {
t.Fatalf("expected buf[1] to be 0")
}
// ensure there's an error if we call the method on something that isn't a SharedArrayBuffer
val, err = ctx.RunScript("7", "test2.js")
if err != nil {
t.Fatalf("error running trivial script")
}
_, _, err = val.SharedArrayBufferGetContents()
if err == nil {
t.Fatalf("Expected an error trying call SharedArrayBufferGetContents on value of incorrect type")
}
}