status-go/vendor/github.com/robertkrimen/otto/otto_test.go

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package otto
import (
"bytes"
"io"
"testing"
"github.com/robertkrimen/otto/parser"
)
func TestOtto(t *testing.T) {
tt(t, func() {
test, _ := test()
test("xyzzy = 2", 2)
test("xyzzy + 2", 4)
test("xyzzy += 16", 18)
test("xyzzy", 18)
test(`
(function(){
return 1
})()
`, 1)
test(`
(function(){
return 1
}).call(this)
`, 1)
test(`
(function(){
var result
(function(){
result = -1
})()
return result
})()
`, -1)
test(`
var abc = 1
abc || (abc = -1)
abc
`, 1)
test(`
var abc = (function(){ 1 === 1 })();
abc;
`, "undefined")
})
}
func TestFunction__(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
function abc() {
return 1;
};
abc();
`, 1)
})
}
func TestIf(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
abc = undefined;
def = undefined;
if (true) abc = 1
else abc = 2;
if (false) {
def = 3;
}
else def = 4;
[ abc, def ];
`, "1,4")
test(`
if (1) {
abc = 1;
}
else {
abc = 0;
}
abc;
`, 1)
test(`
if (0) {
abc = 1;
}
else {
abc = 0;
}
abc;
`, 0)
test(`
abc = 0;
if (0) {
abc = 1;
}
abc;
`, 0)
test(`
abc = 0;
if (abc) {
abc = 1;
}
abc;
`, 0)
})
}
func TestSequence(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
1, 2, 3;
`, 3)
})
}
func TestCall(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
Math.pow(3, 2);
`, 9)
})
}
func TestRunFunctionWithSetArguments(t *testing.T) {
tt(t, func() {
vm := New()
vm.Run(`var sillyFunction = function(record){record.silly = true; record.answer *= -1};`)
record := map[string]interface{}{"foo": "bar", "answer": 42}
// Set performs a conversion that allows the map to be addressed as a Javascript object
vm.Set("argument", record)
_, err := vm.Run("sillyFunction(argument)")
is(err, nil)
is(record["answer"].(float64), -42)
is(record["silly"].(bool), true)
})
}
func TestRunFunctionWithArgumentsPassedToCall(t *testing.T) {
tt(t, func() {
vm := New()
vm.Run(`var sillyFunction = function(record){record.silly = true; record.answer *= -1};`)
record := map[string]interface{}{"foo": "bar", "answer": 42}
_, err := vm.Call("sillyFunction", nil, record)
is(err, nil)
is(record["answer"].(float64), -42)
is(record["silly"].(bool), true)
})
}
func TestMember(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
abc = [ 0, 1, 2 ];
def = {
"abc": 0,
"def": 1,
"ghi": 2,
};
[ abc[2], def.abc, abc[1], def.def ];
`, "2,0,1,1")
})
}
func Test_this(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
typeof this;
`, "object")
})
}
func TestWhile(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
limit = 4
abc = 0
while (limit) {
abc = abc + 1
limit = limit - 1
}
abc;
`, 4)
})
}
func TestSwitch_break(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
var abc = true;
var ghi = "Xyzzy";
while (abc) {
switch ('def') {
case 'def':
break;
}
ghi = "Nothing happens.";
abc = false;
}
ghi;
`, "Nothing happens.")
test(`
var abc = true;
var ghi = "Xyzzy";
WHILE:
while (abc) {
switch ('def') {
case 'def':
break WHILE;
}
ghi = "Nothing happens."
abc = false
}
ghi;
`, "Xyzzy")
test(`
var ghi = "Xyzzy";
FOR:
for (;;) {
switch ('def') {
case 'def':
break FOR;
ghi = "";
}
ghi = "Nothing happens.";
}
ghi;
`, "Xyzzy")
test(`
var ghi = "Xyzzy";
FOR:
for (var jkl in {}) {
switch ('def') {
case 'def':
break FOR;
ghi = "Something happens.";
}
ghi = "Nothing happens.";
}
ghi;
`, "Xyzzy")
test(`
var ghi = "Xyzzy";
function jkl() {
switch ('def') {
case 'def':
break;
ghi = "";
}
ghi = "Nothing happens.";
}
while (abc) {
jkl();
abc = false;
ghi = "Something happens.";
}
ghi;
`, "Something happens.")
})
}
func TestTryFinally(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
var abc;
try {
abc = 1;
}
finally {
abc = 2;
}
abc;
`, 2)
test(`
var abc = false, def = 0;
do {
def += 1;
if (def > 100) {
break;
}
try {
continue;
}
finally {
abc = true;
}
}
while(!abc && def < 10)
def;
`, 1)
test(`
var abc = false, def = 0, ghi = 0;
do {
def += 1;
if (def > 100) {
break;
}
try {
throw 0;
}
catch (jkl) {
continue;
}
finally {
abc = true;
ghi = 11;
}
ghi -= 1;
}
while(!abc && def < 10)
ghi;
`, 11)
test(`
var abc = 0, def = 0;
do {
try {
abc += 1;
throw "ghi";
}
finally {
def = 1;
continue;
}
def -= 1;
}
while (abc < 2)
[ abc, def ];
`, "2,1")
})
}
func TestTryCatch(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
var abc = 1;
try {
throw 4;
abc = -1;
}
catch (xyzzy) {
abc += xyzzy + 1;
}
abc;
`, 6)
test(`
abc = 1;
var def;
try {
try {
throw 4;
abc = -1;
}
catch (xyzzy) {
abc += xyzzy + 1;
throw 64;
}
}
catch (xyzzy) {
def = xyzzy;
abc = -2;
}
[ def, abc ];
`, "64,-2")
})
}
func TestWith(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
var def;
with({ abc: 9 }) {
def = abc;
}
def;
`, 9)
test(`
var def;
with({ abc: function(){
return 11;
} }) {
def = abc();
}
def;
`, 11)
})
}
func TestSwitch(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
var abc = 0;
switch (0) {
default:
abc += 1;
case 1:
abc += 2;
case 2:
abc += 4;
case 3:
abc += 8;
}
abc;
`, 15)
test(`
abc = 0;
switch (3) {
default:
abc += 1;
case 1:
abc += 2;
case 2:
abc += 4;
case 3:
abc += 8;
}
abc;
`, 8)
test(`
abc = 0;
switch (60) {
case 1:
abc += 2;
case 2:
abc += 4;
case 3:
abc += 8;
}
abc;
`, 0)
})
}
func TestForIn(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
var abc;
for (property in { a: 1 }) {
abc = property;
}
abc;
`, "a")
test(`
var ghi;
for (property in new String("xyzzy")) {
ghi = property;
}
ghi;
`, "4")
})
}
func TestFor(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
var abc = 7;
for (i = 0; i < 3; i += 1) {
abc += 1;
}
abc;
`, 10)
test(`
abc = 7;
for (i = 0; i < 3; i += 1) {
abc += 1;
if (i == 1) {
break;
}
}
abc;
`, 9)
test(`
abc = 7;
for (i = 0; i < 3; i += 1) {
if (i == 2) {
continue;
}
abc += 1;
}
abc;
`, 9)
test(`
abc = 0;
for (;;) {
abc += 1;
if (abc == 3)
break;
}
abc;
`, 3)
test(`
for (abc = 0; ;) {
abc += 1;
if (abc == 3)
break;
}
abc;
`, 3)
test(`
for (abc = 0; ; abc += 1) {
abc += 1;
if (abc == 3)
break;
}
abc;
`, 3)
})
}
func TestLabelled(t *testing.T) {
tt(t, func() {
test, _ := test()
// TODO Add emergency break
test(`
xyzzy: for (var abc = 0; abc <= 0; abc++) {
for (var def = 0; def <= 1; def++) {
if (def === 0) {
continue xyzzy;
} else {
}
}
}
`)
test(`
abc = 0
def:
while (true) {
while (true) {
abc = abc + 1
if (abc > 11) {
break def;
}
}
}
abc;
`, 12)
test(`
abc = 0
def:
do {
do {
abc = abc + 1
if (abc > 11) {
break def;
}
} while (true)
} while (true)
abc;
`, 12)
})
}
func TestConditional(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
[ true ? false : true, true ? 1 : 0, false ? 3.14159 : "abc" ];
`, "false,1,abc")
})
}
func TestArrayLiteral(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
[ 1, , 3.14159 ];
`, "1,,3.14159")
})
}
func TestAssignment(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
var abc = 1;
abc;
`, 1)
test(`
abc += 2;
abc;
`, 3)
})
}
func TestBinaryOperation(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`0 == 1`, false)
test(`1 == "1"`, true)
test(`0 === 1`, false)
test(`1 === "1"`, false)
test(`"1" === "1"`, true)
})
}
func Test_typeof(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`typeof abc`, "undefined")
test(`typeof abc === 'undefined'`, true)
test(`typeof {}`, "object")
test(`typeof null`, "object")
})
}
func Test_PrimitiveValueObjectValue(t *testing.T) {
tt(t, func() {
test, _ := test()
Number11 := test(`new Number(11)`)
is(Number11.float64(), 11)
})
}
func Test_eval(t *testing.T) {
tt(t, func() {
test, _ := test()
// FIXME terst, Is this correct?
test(`
var abc = 1;
`, "undefined")
test(`
eval("abc += 1");
`, 2)
test(`
(function(){
var abc = 11;
eval("abc += 1");
return abc;
})();
`, 12)
test(`abc`, 2)
test(`
(function(){
try {
eval("var prop = \\u2029;");
return false;
} catch (abc) {
return [ abc instanceof SyntaxError, abc.toString() ];
}
})();
`, "true,SyntaxError: Unexpected token ILLEGAL")
test(`
function abc(){
this.THIS = eval("this");
}
var def = new abc();
def === def.THIS;
`, true)
})
}
func Test_evalDirectIndirect(t *testing.T) {
tt(t, func() {
test, _ := test()
// (function () {return this;}()).abc = "global";
test(`
var abc = "global";
(function(){
try {
var _eval = eval;
var abc = "function";
return [
_eval("\'global\' === abc"), // eval (Indirect)
eval("\'function\' === abc"), // eval (Direct)
];
} finally {
delete this.abc;
}
})();
`, "true,true")
})
}
func TestError_URIError(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`new URIError() instanceof URIError`, true)
test(`
var abc
try {
decodeURI("http://example.com/ _^#%")
}
catch (def) {
abc = def instanceof URIError
}
abc
`, true)
})
}
func TestTo(t *testing.T) {
tt(t, func() {
test, _ := test()
{
value, _ := test(`"11"`).ToFloat()
is(value, float64(11))
}
{
value, _ := test(`"11"`).ToInteger()
is(value, int64(11))
value, _ = test(`1.1`).ToInteger()
is(value, int64(1))
}
})
}
func TestShouldError(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`raise:
xyzzy
throw new TypeError("Nothing happens.")
`, "ReferenceError: 'xyzzy' is not defined")
})
}
func TestAPI(t *testing.T) {
tt(t, func() {
test, vm := test()
test(`
String.prototype.xyzzy = function(){
return this.length + 11 + (arguments[0] || 0)
}
abc = new String("xyzzy")
def = "Nothing happens."
abc.xyzzy()
`, 16)
abc, _ := vm.Get("abc")
def, _ := vm.Get("def")
object := abc.Object()
result, _ := object.Call("xyzzy")
is(result, 16)
result, _ = object.Call("xyzzy", 1)
is(result, 17)
value, _ := object.Get("xyzzy")
result, _ = value.Call(def)
is(result, 27)
result, _ = value.Call(def, 3)
is(result, 30)
object = value.Object() // Object xyzzy
result, _ = object.Value().Call(def, 3)
is(result, 30)
test(`
abc = {
'abc': 1,
'def': false,
3.14159: NaN,
};
abc['abc'];
`, 1)
abc, err := vm.Get("abc")
is(err, nil)
object = abc.Object() // Object abc
value, err = object.Get("abc")
is(err, nil)
is(value, 1)
is(object.Keys(), []string{"abc", "def", "3.14159"})
test(`
abc = [ 0, 1, 2, 3.14159, "abc", , ];
abc.def = true;
`)
abc, err = vm.Get("abc")
is(err, nil)
object = abc.Object() // Object abc
is(object.Keys(), []string{"0", "1", "2", "3", "4", "def"})
})
}
func TestObjectKeys(t *testing.T) {
tt(t, func() {
vm := New()
vm.Eval(`var x = Object.create(null); x.a = 1`)
vm.Eval(`var y = Object.create(x); y.b = 2`)
o1, _ := vm.Object("x")
is(o1.Keys(), []string{"a"})
is(o1.KeysByParent(), [][]string{{"a"}})
o2, _ := vm.Object("y")
is(o2.Keys(), []string{"b"})
is(o2.KeysByParent(), [][]string{{"b"}, {"a"}})
})
}
func TestUnicode(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`var abc = eval("\"a\uFFFFa\"");`, "undefined")
test(`abc.length`, 3)
test(`abc != "aa"`, true)
test("abc[1] === \"\uFFFF\"", true)
})
}
func TestDotMember(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
abc = {
ghi: 11,
}
abc.def = "Xyzzy"
abc.null = "Nothing happens."
`)
test(`abc.def`, "Xyzzy")
test(`abc.null`, "Nothing happens.")
test(`abc.ghi`, 11)
test(`
abc = {
null: 11,
}
`)
test(`abc.def`, "undefined")
test(`abc.null`, 11)
test(`abc.ghi`, "undefined")
})
}
func Test_stringToFloat(t *testing.T) {
tt(t, func() {
is(parseNumber("10e10000"), _Infinity)
is(parseNumber("10e10_."), _NaN)
})
}
func Test_delete(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
delete 42;
`, true)
test(`
var abc = delete $_undefined_$;
abc = abc && delete ($_undefined_$);
abc;
`, true)
// delete should not trigger get()
test(`
var abc = {
get def() {
throw "Test_delete: delete should not trigger get()"
}
};
delete abc.def
`, true)
})
}
func TestObject_defineOwnProperty(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
var object = {};
var descriptor = new Boolean(false);
descriptor.configurable = true;
Object.defineProperties(object, {
property: descriptor
});
var abc = object.hasOwnProperty("property");
delete object.property;
var def = object.hasOwnProperty("property");
[ abc, def ];
`, "true,false")
test(`
var object = [0, 1, 2];
Object.defineProperty(object, "0", {
value: 42,
writable: false,
enumerable: false,
configurable: false
});
var abc = Object.getOwnPropertyDescriptor(object, "0");
[ abc.value, abc.writable, abc.enumerable, abc.configurable ];
`, "42,false,false,false")
test(`
var abc = { "xyzzy": 42 };
var def = Object.defineProperties(abc, "");
abc === def;
`, true)
})
}
func Test_assignmentEvaluationOrder(t *testing.T) {
tt(t, func() {
test, _ := test()
test(`
var abc = 0;
((abc = 1) & abc);
`, 1)
test(`
var abc = 0;
(abc & (abc = 1));
`, 0)
})
}
func TestOttoCall(t *testing.T) {
tt(t, func() {
vm := New()
_, err := vm.Run(`
var abc = {
ghi: 1,
def: function(def){
var ghi = 0;
if (this.ghi) {
ghi = this.ghi;
}
return "def: " + (def + 3.14159 + ghi);
}
};
function structFunc(s) {
return s.Val;
}
`)
is(err, nil)
value, err := vm.Call(`abc.def`, nil, 2)
is(err, nil)
is(value, "def: 6.14159")
value, err = vm.Call(`abc.def`, "", 2)
is(err, nil)
is(value, "def: 5.14159")
// Do not attempt to do a ToValue on a this of nil
value, err = vm.Call(`jkl.def`, nil, 1, 2, 3)
is(err, "!=", nil)
is(value, "undefined")
value, err = vm.Call(`[ 1, 2, 3, undefined, 4 ].concat`, nil, 5, 6, 7, "abc")
is(err, nil)
is(value, "1,2,3,,4,5,6,7,abc")
s := struct{ Val int }{Val: 10}
value, err = vm.Call("structFunc", nil, s)
is(err, nil)
is(value, 10)
})
}
func TestOttoCall_new(t *testing.T) {
tt(t, func() {
test, vm := test()
vm.Set("abc", func(call FunctionCall) Value {
value, err := call.Otto.Call(`new Object`, nil, "Nothing happens.")
is(err, nil)
return value
})
test(`
def = abc();
[ def, def instanceof String ];
`, "Nothing happens.,true")
})
}
func TestOttoCall_newWithBrackets(t *testing.T) {
tt(t, func() {
test, vm := test()
_, err := vm.Run(`var a = {default: function B(x) { this.x = x; } }`)
is(err, nil)
test(`(new a['default'](1)).x`, 1)
})
}
func TestOttoCall_throw(t *testing.T) {
// FIXME? (Been broken for a while)
// Looks like this has been broken for a while... what
// behavior do we want here?
if true {
return
}
tt(t, func() {
test, vm := test()
vm.Set("abc", func(call FunctionCall) Value {
if false {
call.Otto.Call(`throw eval`, nil, "({ def: 3.14159 })")
}
call.Otto.Call(`throw Error`, nil, "abcdef")
return Value{}
})
// TODO try { abc(); } catch (err) { error = err }
// Possible unrelated error case:
// If error is not declared beforehand, is later referencing it a ReferenceError?
// Should the catch { } declare error in the outer scope?
test(`
var error;
try {
abc();
}
catch (err) {
error = err;
}
[ error instanceof Error, error.message, error.def ];
`, "true,abcdef,")
vm.Set("def", func(call FunctionCall) Value {
call.Otto.Call(`throw new Object`, nil, 3.14159)
return UndefinedValue()
})
test(`
try {
def();
}
catch (err) {
error = err;
}
[ error instanceof Error, error.message, error.def, typeof error, error, error instanceof Number ];
`, "false,,,object,3.14159,true")
})
}
func TestOttoCopy(t *testing.T) {
tt(t, func() {
vm0 := New()
vm0.Run(`
var abc = function() {
return "Xyzzy";
};
function def() {
return abc() + (0 + {});
}
`)
value, err := vm0.Run(`
def();
`)
is(err, nil)
is(value, "Xyzzy0[object Object]")
vm1 := vm0.Copy()
value, err = vm1.Run(`
def();
`)
is(err, nil)
is(value, "Xyzzy0[object Object]")
vm1.Run(`
abc = function() {
return 3.14159;
};
`)
value, err = vm1.Run(`
def();
`)
is(err, nil)
is(value, "3.141590[object Object]")
value, err = vm0.Run(`
def();
`)
is(err, nil)
is(value, "Xyzzy0[object Object]")
{
vm0 := New()
vm0.Run(`
var global = (function () {return this;}())
var abc = 0;
var vm = "vm0";
var def = (function(){
var jkl = 0;
var abc = function() {
global.abc += 1;
jkl += 1;
return 1;
};
return function() {
return [ vm, global.abc, jkl, abc() ];
};
})();
`)
value, err := vm0.Run(`
def();
`)
is(err, nil)
is(value, "vm0,0,0,1")
vm1 := vm0.Copy()
vm1.Set("vm", "vm1")
value, err = vm1.Run(`
def();
`)
is(err, nil)
is(value, "vm1,1,1,1")
value, err = vm0.Run(`
def();
`)
is(err, nil)
is(value, "vm0,1,1,1")
value, err = vm1.Run(`
def();
`)
is(err, nil)
is(value, "vm1,2,2,1")
}
})
}
func TestOttoCall_clone(t *testing.T) {
tt(t, func() {
vm := New().clone()
rt := vm.runtime
{
// FIXME terst, Check how this comparison is done
is(rt.global.Array.prototype, rt.global.FunctionPrototype)
is(rt.global.ArrayPrototype, "!=", nil)
is(rt.global.Array.runtime, rt)
is(rt.global.Array.prototype.runtime, rt)
is(rt.global.Array.get("prototype")._object().runtime, rt)
}
{
value, err := vm.Run(`[ 1, 2, 3 ].toString()`)
is(err, nil)
is(value, "1,2,3")
}
{
value, err := vm.Run(`[ 1, 2, 3 ]`)
is(err, nil)
is(value, "1,2,3")
object := value._object()
is(object, "!=", nil)
is(object.prototype, rt.global.ArrayPrototype)
value, err = vm.Run(`Array.prototype`)
is(err, nil)
object = value._object()
is(object.runtime, rt)
is(object, "!=", nil)
is(object, rt.global.ArrayPrototype)
}
{
otto1 := New()
_, err := otto1.Run(`
var abc = 1;
var def = 2;
`)
is(err, nil)
otto2 := otto1.clone()
value, err := otto2.Run(`abc += 1; abc;`)
is(err, nil)
is(value, 2)
value, err = otto1.Run(`abc += 4; abc;`)
is(err, nil)
is(value, 5)
}
{
vm1 := New()
_, err := vm1.Run(`
var abc = 1;
var def = function(value) {
abc += value;
return abc;
}
`)
is(err, nil)
vm2 := vm1.clone()
value, err := vm2.Run(`def(1)`)
is(err, nil)
is(value, 2)
value, err = vm1.Run(`def(4)`)
is(err, nil)
is(value, 5)
}
{
vm1 := New()
_, err := vm1.Run(`
var abc = {
ghi: 1,
jkl: function(value) {
this.ghi += value;
return this.ghi;
}
};
var def = {
abc: abc
};
`)
is(err, nil)
otto2 := vm1.clone()
value, err := otto2.Run(`def.abc.jkl(1)`)
is(err, nil)
is(value, 2)
value, err = vm1.Run(`def.abc.jkl(4)`)
is(err, nil)
is(value, 5)
}
{
vm1 := New()
_, err := vm1.Run(`
var abc = function() { return "abc"; };
var def = function() { return "def"; };
`)
is(err, nil)
vm2 := vm1.clone()
value, err := vm2.Run(`
[ abc.toString(), def.toString() ];
`)
is(value, `function() { return "abc"; },function() { return "def"; }`)
_, err = vm2.Run(`
var def = function() { return "ghi"; };
`)
is(err, nil)
value, err = vm1.Run(`
[ abc.toString(), def.toString() ];
`)
is(value, `function() { return "abc"; },function() { return "def"; }`)
value, err = vm2.Run(`
[ abc.toString(), def.toString() ];
`)
is(value, `function() { return "abc"; },function() { return "ghi"; }`)
}
})
}
func TestOttoRun(t *testing.T) {
tt(t, func() {
vm := New()
program, err := parser.ParseFile(nil, "", "", 0)
is(err, nil)
value, err := vm.Run(program)
is(err, nil)
is(value, UndefinedValue())
program, err = parser.ParseFile(nil, "", "2 + 2", 0)
is(err, nil)
value, err = vm.Run(program)
is(err, nil)
is(value, 4)
value, err = vm.Run(program)
is(err, nil)
is(value, 4)
program, err = parser.ParseFile(nil, "", "var abc; if (!abc) abc = 0; abc += 2; abc;", 0)
value, err = vm.Run(program)
is(err, nil)
is(value, 2)
value, err = vm.Run(program)
is(err, nil)
is(value, 4)
value, err = vm.Run(program)
is(err, nil)
is(value, 6)
{
src := []byte("var abc; if (!abc) abc = 0; abc += 2; abc;")
value, err = vm.Run(src)
is(err, nil)
is(value, 8)
value, err = vm.Run(bytes.NewBuffer(src))
is(err, nil)
is(value, 10)
value, err = vm.Run(io.Reader(bytes.NewBuffer(src)))
is(err, nil)
is(value, 12)
}
{
script, err := vm.Compile("", `var abc; if (!abc) abc = 0; abc += 2; abc;`)
is(err, nil)
value, err = vm.Run(script)
is(err, nil)
is(value, 14)
value, err = vm.Run(script)
is(err, nil)
is(value, 16)
is(script.String(), "// \nvar abc; if (!abc) abc = 0; abc += 2; abc;")
}
})
}
// This generates functions to be used by the test below. The arguments are
// `src`, which is something that otto can execute, and `expected`, which is
// what the result of executing `src` should be.
func makeTestOttoEvalFunction(src, expected interface{}) func(c FunctionCall) Value {
return func(c FunctionCall) Value {
v, err := c.Otto.Eval(src)
is(err, nil)
if err != nil {
panic(err)
}
i, err := v.Export()
is(err, nil)
if err != nil {
panic(err)
}
is(i, expected)
return v
}
}
func TestOttoEval(t *testing.T) {
tt(t, func() {
vm := New()
vm.Set("x1", makeTestOttoEvalFunction(`a`, 1))
vm.Set("y1", makeTestOttoEvalFunction(`b`, "hello"))
vm.Set("z1", makeTestOttoEvalFunction(`c`, true))
vm.Set("w", makeTestOttoEvalFunction(`a = 2; b = 'what'; c = false; null`, nil))
vm.Set("x2", makeTestOttoEvalFunction(`a`, 2))
vm.Set("y2", makeTestOttoEvalFunction(`b`, "what"))
vm.Set("z2", makeTestOttoEvalFunction(`c`, false))
// note that these variables are defined in the scope of function `t`,
// so would not usually be available to the functions called below.
//
// this is _not_ the recommended use case for `Eval` - instead it's
// intended to be used in `debugger` handlers. this code here is the
// equivalent of reading behind the current stack frame in C...
// technically valid, but completely insane.
//
// makes for a good test case though.
_, err := vm.Run(`(function t() {
var a = 1;
var b = 'hello';
var c = true;
x1();
y1();
z1();
w();
x2();
y2();
z2();
}())`)
is(err, nil)
})
// this test makes sure that `Eval` doesn't explode if the VM doesn't have
// a scope other than global defined.
tt(t, func() {
vm := New()
_, err := vm.Eval("null")
is(err, nil)
vm.Set("a", 1)
vm.Set("b", 2)
v, err := vm.Eval("a + b")
is(err, nil)
r, err := v.Export()
is(err, nil)
is(r, 3)
})
}
func TestOttoContext(t *testing.T) {
// These are all the builtin global scope symbols
builtins := []string{
"escape",
"URIError",
"RegExp",
"ReferenceError",
"parseFloat",
"parseInt",
"SyntaxError",
"decodeURIComponent",
"encodeURIComponent",
"Infinity",
"JSON",
"isNaN",
"unescape",
"decodeURI",
"Object",
"Function",
"RangeError",
"Error",
"get_context",
"eval",
"Number",
"Math",
"NaN",
"Date",
"Boolean",
"console",
"encodeURI",
"EvalError",
"Array",
"TypeError",
"String",
"isFinite",
"undefined",
}
tt(t, func() {
vm := New()
vm.Set("get_context", func(c FunctionCall) Value {
ctx := c.Otto.Context()
is(ctx.Callee, "f1")
is(ctx.Filename, "<anonymous>")
is(ctx.Line, 8)
is(ctx.Column, 5)
is(ctx.Stacktrace, []string{
"f1 (<anonymous>:8:5)",
"f2 (<anonymous>:15:5)",
"f3 (<anonymous>:19:5)",
"t (<anonymous>:22:4)",
})
is(len(ctx.Symbols), 9+len(builtins))
is(ctx.Symbols["a"], 1)
is(ctx.Symbols["b"], "hello")
is(ctx.Symbols["c"], true)
is(ctx.Symbols["j"], 2)
is(ctx.Symbols["f1"].IsFunction(), true)
is(ctx.Symbols["f2"].IsFunction(), true)
is(ctx.Symbols["f3"].IsFunction(), true)
is(ctx.Symbols["t"].IsFunction(), true)
callee, _ := ctx.Symbols["arguments"].Object().Get("callee")
is(callee.IsDefined(), true)
return Value{}
})
_, err := vm.Run(`(function t() {
var a = 1;
var b = 'hello';
var c = true;
function f1() {
var j = 2;
get_context();
(function() {
var d = 4;
})()
}
function f2() {
f1();
}
function f3() {
f2();
}
f3();
a = 2;
b = 'goodbye';
c = false;
}())`)
is(err, nil)
})
// this test makes sure that `Context` works on global scope by default, if
// there is not a current scope.
tt(t, func() {
vm := New()
vm.Set("get_context", func(c FunctionCall) Value {
ctx := c.Otto.Context()
is(ctx.Callee, "")
is(ctx.Filename, "<anonymous>")
is(ctx.Line, 3)
is(ctx.Column, 4)
is(ctx.Stacktrace, []string{"<anonymous>:3:4"})
is(len(ctx.Symbols), 2+len(builtins))
is(ctx.Symbols["a"], 1)
is(ctx.Symbols["b"], UndefinedValue())
return Value{}
})
_, err := vm.Run(`
var a = 1;
get_context()
var b = 2;
`)
is(err, nil)
})
// this test makes sure variables are shadowed correctly.
tt(t, func() {
vm := New()
vm.Set("check_context", func(c FunctionCall) Value {
n, err := c.Argument(0).ToInteger()
is(err, nil)
ctx := c.Otto.Context()
is(ctx.Symbols["a"], n)
return Value{}
})
_, err := vm.Run(`
var a = 1;
check_context(1);
(function() {
var a = 2;
check_context(2);
}());
(function(a) {
check_context(3);
}(3));
(function(a) {
check_context(4);
}).call(null, 4);
check_context(1);
`)
is(err, nil)
})
}
func Test_objectLength(t *testing.T) {
tt(t, func() {
_, vm := test()
value := vm.Set("abc", []string{"jkl", "mno"})
is(objectLength(value._object()), 2)
value, _ = vm.Run(`[1, 2, 3]`)
is(objectLength(value._object()), 3)
value, _ = vm.Run(`new String("abcdefghi")`)
is(objectLength(value._object()), 9)
value, _ = vm.Run(`"abcdefghi"`)
is(objectLength(value._object()), 0)
})
}
func Test_stackLimit(t *testing.T) {
// JavaScript stack depth before entering `a` is 5; becomes 6 after
// entering. setting the maximum stack depth to 5 should result in an
// error ocurring at that 5 -> 6 boundary.
code := `
function a() {}
function b() { a(); }
function c() { b(); }
function d() { c(); }
function e() { d(); }
e();
`
// has no error
tt(t, func() {
_, vm := test()
_, err := vm.Run(code)
is(err == nil, true)
})
// has error
tt(t, func() {
_, vm := test()
vm.vm.SetStackDepthLimit(2)
_, err := vm.Run(code)
is(err == nil, false)
})
// has error
tt(t, func() {
_, vm := test()
vm.vm.SetStackDepthLimit(5)
_, err := vm.Run(code)
is(err == nil, false)
})
// has no error
tt(t, func() {
_, vm := test()
vm.vm.SetStackDepthLimit(6)
_, err := vm.Run(code)
is(err == nil, true)
})
// has no error
tt(t, func() {
_, vm := test()
vm.vm.SetStackDepthLimit(1)
vm.vm.SetStackDepthLimit(0)
_, err := vm.Run(code)
is(err == nil, true)
})
}
func BenchmarkNew(b *testing.B) {
for i := 0; i < b.N; i++ {
New()
}
}
func BenchmarkClone(b *testing.B) {
vm := New()
b.ResetTimer()
for i := 0; i < b.N; i++ {
vm.clone()
}
}