163 lines
6.4 KiB
JavaScript
163 lines
6.4 KiB
JavaScript
description(
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"This performs a number of different tests on JavaScript getters and setters."
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);
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debug("the get set object declaration syntax");
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var o1 = { 'a':7, get b() { return this.a + 1 }, set b(x) { this.a = x } }
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shouldBe("o1.b", "8");
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o1.b = 10;
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shouldBe("o1.b", "11");
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debug("__defineGetter__ and __defineSetter__");
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var o2 = new Object()
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o2.a = 7;
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o2.__defineGetter__('b', function getB() { return this.a + 1} )
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o2.__defineSetter__('b', function setB(x) { this.a = x})
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shouldBe("o2.b", "8");
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o2.b = 10;
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shouldBe("o2.b", "11");
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debug("Setting a value without having a setter");
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var o3 = { get x() { return 42; } }
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shouldBe("o3.x = 10; o3.x", "42");
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debug("Getting a value without having a getter");
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var o4 = { set x(y) { }}
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shouldBeUndefined("o4.x");
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debug("__lookupGetter__ and __lookupSetter__");
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var o4 = new Object()
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function getB() { return this.a }
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function setB(x) { this.a = x }
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o4.__defineGetter__('b', getB)
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o4.__defineSetter__('b', setB)
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shouldBe("o4.__lookupGetter__('b')", "getB");
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shouldBe("o4.__lookupSetter__('b')", "setB");
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debug("__defineGetter__ and __defineSetter__ with various invalid arguments");
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var numExceptions = 0;
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var o5 = new Object();
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shouldThrow("o5.__defineSetter__('a', null)");
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shouldThrow("o5.__defineSetter__('a', o5)");
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shouldThrow("o5.__defineGetter__('a', null)");
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shouldThrow("o5.__defineGetter__('a', o5)");
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debug("setters and getters with exceptions");
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var o6 = { get x() { throw 'Exception in get'}, set x(f) { throw 'Exception in set'}}
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var x = 0;
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var numExceptions = 0;
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shouldThrow("x = o6.x");
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shouldBe("x", "0");
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shouldThrow("o6.x = 42");
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debug("Defining a setter should also define a getter for the same property which returns undefined. Thus, a getter defined on the prototype should not be called.");
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o7 = { 'a':7, set x(b) { this.a = b; }}
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o7.prototype = { get x() { return 42; }}
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shouldBeUndefined("o7.x")
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debug("If an object has a property and its prototype has a setter function for that property, then setting the property should set the property directly and not call the setter function.");
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var o8 = new Object()
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o8.numSets = 0;
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o8.x = 10;
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o8.__proto__.__defineSetter__('x', function() { this.numSets++; })
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o8.x = 20;
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shouldBe("o8.numSets", "0");
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({getter:"foo", b:"bar"});
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testObj=({get getter(){return 'getter was called.'}, b: 'bar'})
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shouldBe("typeof testObj.getter", "'string'");
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debug("the get set with string property name");
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var o9 = { 'a':7, get 'b'() { return this.a + 1 }, set 'b'(x) { this.a = x } }
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shouldBe("o9.b", "8");
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o9.b = 10;
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shouldBe("o9.b", "11");
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debug("the get set with numeric property name");
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var o10 = { 'a':7, get 42() { return this.a + 1 }, set 42(x) { this.a = x } }
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shouldBe("o10[42]", "8");
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o10[42] = 10;
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shouldBe("o10[42]", "11");
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debug("Defining getter only and accessing __lookupSetter__ should not crash");
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var o11 = new Object()
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function getB() { return this.a }
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o11.__defineGetter__('b', getB)
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shouldBe("o11.__lookupSetter__('b')", "void 0");
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debug("Defining setter only and accessing __lookupGetter__ should not crash");
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var o12 = new Object()
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function setB(x) { this.a = x }
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o12.__defineSetter__('b', setB)
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shouldBe("o12.__lookupGetter__('b')", "void 0");
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debug("When undefined, accessing __lookupGetter__ and __lookupSetter__ should not crash");
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var o13 = new Object()
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shouldBe("o13.__lookupGetter__('b')", "void 0");
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shouldBe("o13.__lookupSetter__('b')", "void 0");
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debug("__defineGetter__ and __defineSetter__ should throw exceptions when acting on sealed objects");
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var o14 = {a:14};
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Object.seal(o14);
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shouldThrow("o14.__defineGetter__('a', function(){})");
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shouldThrow("o14.__defineGetter__('b', function(){})");
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shouldThrow("o14.__defineSetter__('a', function(){})");
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shouldThrow("o14.__defineSetter__('b', function(){})");
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debug("__defineGetter__ and __defineSetter__ should throw exceptions when acting on frozen objects");
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var o15 = {a:15};
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Object.freeze(o15);
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shouldThrow("o15.__defineGetter__('a', function(){})");
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shouldThrow("o15.__defineGetter__('b', function(){})");
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shouldThrow("o15.__defineSetter__('a', function(){})");
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shouldThrow("o15.__defineSetter__('b', function(){})");
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debug("__defineGetter__ and __defineSetter__ should throw exceptions when acting on unconfigurable properties");
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var o16 = {a:16};
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Object.defineProperty(o16, "b", {value: 16, configurable: false});
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shouldNotThrow("o16.__defineGetter__('a', function(){})");
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shouldNotThrow("o16.__defineSetter__('a', function(){})");
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shouldThrow("o16.__defineSetter__('b', function(){})");
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shouldThrow("o16.__defineSetter__('b', function(){})");
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debug("__lookupGetter__ can be interrupted by a proxy throwing an exception");
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var getter17 = () => { return "WebKit!"}
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var o17 = Object.defineProperty(new Object, 'property', { get: getter17 });
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shouldBeEqualToString("o17.property", "WebKit!");
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shouldBe("o17.__lookupGetter__('property')", "getter17");
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shouldBe("o17.__lookupSetter__('property')", "undefined");
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var o17Exception = { toString: () => { return "o17 Proxy raised exception"; } };
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var o17Proxy = new Proxy(o17, { getOwnPropertyDescriptor: () => { throw o17Exception; } });
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shouldThrow("o17Proxy.__lookupGetter__('property')", o17Exception);
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shouldThrow("o17Proxy.__lookupSetter__('property')", o17Exception);
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shouldBeEqualToString("o17Proxy.property", "WebKit!");
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shouldBeEqualToString("o17.property", "WebKit!");
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shouldBe("o17.__lookupGetter__('property')", "getter17");
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debug("__lookupSetter__ can be interrupted by a proxy throwing an exception");
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var setter18 = function (newValue) { return this.value = newValue; }
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var o18 = Object.defineProperty(new Object, 'property', { set: setter18 });
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shouldBe("o18.property = 5", "5");
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shouldBe("o18.property", "undefined");
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shouldBe("o18.value", "5");
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shouldBe("o18.__lookupGetter__('property')", "undefined");
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shouldBe("o18.__lookupSetter__('property')", "setter18");
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var o18Exception = { toString: () => { return "o18 Proxy raised exception"; } };
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var o18Proxy = new Proxy(o18, { getOwnPropertyDescriptor: () => { throw o18Exception; } });
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shouldThrow("o18Proxy.__lookupGetter__('property')", o18Exception);
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shouldThrow("o18Proxy.__lookupSetter__('property')", o18Exception);
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shouldThrow("o18Proxy.property = 'JavaScriptCore!'", o18Exception);
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shouldBe("o18Proxy.property", "undefined");
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shouldBe("o18Proxy.value", "5");
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shouldBeEqualToString("o18.property = 'JavaScriptCore!'", "JavaScriptCore!");
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shouldBe("o18.property", "undefined");
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shouldBeEqualToString("o18.value", "JavaScriptCore!");
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shouldBe("o18.__lookupGetter__('property')", "undefined");
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shouldBe("o18.__lookupSetter__('property')", "setter18");
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