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// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --harmony-tostring
var global = this;
var funs = {
Object: [ Object ],
Function: [ Function ],
String: [ String ],
Boolean: [ Boolean ],
Number: [ Number ],
Date: [ Date ],
RegExp: [ RegExp ],
Error: [ Error, TypeError, RangeError, SyntaxError, ReferenceError,
EvalError, URIError ]
}
for (f in funs) {
for (i in funs[f]) {
assertEquals("[object " + f + "]",
Array.prototype.toString.call(new funs[f][i]),
funs[f][i]);
assertEquals("[object Function]",
Array.prototype.toString.call(funs[f][i]),
funs[f][i]);
}
}
function testToStringTag(className) {
// Using builtin toStringTags
var obj = {};
obj[Symbol.toStringTag] = className;
assertEquals("[object " + className + "]",
Array.prototype.toString.call(obj));
// Getter throws
obj = {};
Object.defineProperty(obj, Symbol.toStringTag, {
get: function() { throw className; }
});
assertThrowsEquals(function() {
Array.prototype.toString.call(obj);
}, className);
// Getter does not throw
obj = {};
Object.defineProperty(obj, Symbol.toStringTag, {
get: function() { return className; }
});
assertEquals("[object " + className + "]",
Array.prototype.toString.call(obj));
// Custom, non-builtin toStringTags
obj = {};
obj[Symbol.toStringTag] = "X" + className;
assertEquals("[object X" + className + "]",
Array.prototype.toString.call(obj));
// With getter
obj = {};
Object.defineProperty(obj, Symbol.toStringTag, {
get: function() { return "X" + className; }
});
assertEquals("[object X" + className + "]",
Array.prototype.toString.call(obj));
// Undefined toStringTag should return [object className]
var obj = className === "Arguments" ?
(function() { return arguments; })() : new global[className];
obj[Symbol.toStringTag] = undefined;
assertEquals("[object " + className + "]",
Array.prototype.toString.call(obj));
// With getter
var obj = className === "Arguments" ?
(function() { return arguments; })() : new global[className];
Object.defineProperty(obj, Symbol.toStringTag, {
get: function() { return undefined; }
});
assertEquals("[object " + className + "]",
Array.prototype.toString.call(obj));
}
[
"Arguments",
"Boolean",
"Date",
"Error",
"Function",
"Number",
"RegExp",
"String"
].forEach(testToStringTag);
function testToStringTagNonString(value) {
var obj = {};
obj[Symbol.toStringTag] = value;
assertEquals("[object Object]", Array.prototype.toString.call(obj));
// With getter
obj = {};
Object.defineProperty(obj, Symbol.toStringTag, {
get: function() { return value; }
});
assertEquals("[object Object]", Array.prototype.toString.call(obj));
}
[
null,
function() {},
[],
{},
/regexp/,
42,
Symbol("sym"),
new Date(),
(function() { return arguments; })(),
true,
new Error("oops"),
new String("str")
].forEach(testToStringTagNonString);
function testArrayToStringPropertyDesc() {
var desc = Object.getOwnPropertyDescriptor(Object.prototype, "toString");
assertTrue(desc.writable);
assertFalse(desc.enumerable);
assertTrue(desc.configurable);
}
testArrayToStringPropertyDesc();
function testArrayToStringOwnNonStringValue() {
var obj = Object.defineProperty({}, Symbol.toStringTag, { value: 1 });
assertEquals("[object Object]", ([]).toString.call(obj));
}
testArrayToStringOwnNonStringValue();
function testArrayToStringBasic() {
assertEquals("1,2,3", [1,2,3].toString());
assertEquals(",,3", [,,3].toString());
}
testArrayToStringBasic();
function testArrayToStringObjectWithCallableJoin() {
var obj = { join: function() { return "CallableJoin"; } };
assertEquals("CallableJoin", Array.prototype.toString.call(obj));
}
testArrayToStringObjectWithCallableJoin();
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