LayoutTests/js/dom/named-property-deleter.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <head>
     <script src="../../resources/testharness.js"></script>
     <script src="../../resources/testharnessreport.js"></script>
 </head>
 <body>
 <script>
     // To test a named property deleter with [OverrideBuiltins] specified, we use DOMStringMap via element.dataset.
     test(() => {
         let element = document.createElement("div");
         element.dataset["a"] = "value1";
         element.dataset["b"] = "value2";

         assert_true(delete element.dataset["a"], "Deleting a property known to be in the dataset should return true.");
         assert_true(element.dataset["a"] == undefined, "Deleting a property known to be in the dataset should return true.");
         assert_true(delete element.dataset["c"], "Deleting a property known NOT to be in the dataset should return true.");
         assert_true(delete element.dataset["-invalid"], "Deleting a property known NOT to be in the dataset and invalid should return true.");
     }, "Test that the return value of deleting properties is correct ([OverrideBuiltins] specified).");

     test(() => {
         let element = document.createElement("div");
         element.dataset[1] = "value1";
         element.dataset[2] = "value2";

         assert_true(delete element.dataset[1], "Deleting a numeric property known to be in the dataset should return true.");
         assert_equals(element.dataset[1], undefined, "Deleting a numeric property known to be in the dataset should remove the property.");
         assert_true(delete element.dataset[3], "Deleting a numeric property known NOT to be in the dataset should return true.");
     }, "Test that the return value of deleting numeric properties is correct ([OverrideBuiltins] specified).");

     test((t) => {
         t.add_cleanup(() => {
           delete DOMStringMap.prototype["customProperty"];
         });

         let element = document.createElement("div");

         DOMStringMap.prototype["customProperty"] = 'prototype-value';
         assert_true(delete element.dataset["customProperty"], "");
         assert_equals(DOMStringMap.prototype["customProperty"], 'prototype-value');
     }, "Test that deleting a property that does not exist in the map, but does on the prototype, will return true and not remove the property from the prototype ([OverrideBuiltins] specified).");

     // To test a named property deleter without [OverrideBuiltins] specified, we use Storage via window.sessionStorage.
     test((t) => {
         t.add_cleanup(() => {
           window.sessionStorage.clear();
         });

         window.sessionStorage.clear();
         assert_equals(window.sessionStorage.length, 0);

         window.sessionStorage["a"] = "value1";
         window.sessionStorage["b"] = "value2";

         assert_true(delete window.sessionStorage["a"], "Deleting a property known to be in the dataset should return true.");
         assert_true(window.sessionStorage["a"] == undefined, "Deleting a property known to be in the dataset should return true.");
         assert_true(delete window.sessionStorage["c"], "Deleting a property known NOT to be in the dataset should return true.");
     }, "Test that the return value of deleting properties is correct ([OverrideBuiltins] not specified).");

     test((t) => {
         t.add_cleanup(() => {
           window.sessionStorage.clear();
         });

         window.sessionStorage.clear();
         assert_equals(window.sessionStorage.length, 0);

         window.sessionStorage[1] = "value1";
         window.sessionStorage[2] = "value2";

         assert_true(delete window.sessionStorage[1], "Deleting a numeric property known to be in the dataset should return true.");
         assert_equals(window.sessionStorage[1], undefined, "Deleting a numeric property known to be in the dataset should remove the property.");
         assert_true(delete window.sessionStorage[3], "Deleting a numeric property known NOT to be in the dataset should return true.");
     }, "Test that the return value of deleting numeric properties is correct ([OverrideBuiltins] not specified).");

     test((t) => {
         t.add_cleanup(() => {
           window.sessionStorage.clear();
         });

         window.sessionStorage.clear();
         assert_equals(window.sessionStorage.length, 0);

         window.sessionStorage['a'] = "value1";
         window.sessionStorage['b'] = "value2";

         // First note that trying to set the builtin, length in this case, does not work.
         let currentLength = window.sessionStorage['length'];
         window.sessionStorage['length'] = 'value3';
         assert_equals(window.sessionStorage['length'], currentLength);

         // Attempting to delete it also does not work.
         assert_true(delete window.sessionStorage['length'], "Deleting a builtin property returns true.");
         assert_equals(window.sessionStorage['length'], currentLength);
     }, "Test that you can't delete a builtin property ([OverrideBuiltins] not specified).");

     test((t) => {
         t.add_cleanup(() => {
           window.sessionStorage.clear();
           delete Storage.prototype["customProperty"];
         });

         Storage.prototype["customProperty"] = 'prototype-value';
         assert_true(delete window.sessionStorage["customProperty"], "Deleting the a property known to exist on the prototype but not in the map should return true.");
         assert_equals(Storage.prototype["customProperty"], 'prototype-value');

     }, "Test that deleting a property that does not exist in the map, but does on the prototype, will return true and not remove the property from the prototype ([OverrideBuiltins] not specified).");
 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<script src="../../resources/testharness.js"></script>
	<script src="../../resources/testharnessreport.js"></script>
	</head>
	<body>
	<script>
	// To test a named property deleter with [OverrideBuiltins] specified, we use DOMStringMap via element.dataset.
	test(() => {
	let element = document.createElement("div");
	element.dataset["a"] = "value1";
	element.dataset["b"] = "value2";

	assert_true(delete element.dataset["a"], "Deleting a property known to be in the dataset should return true.");
	assert_true(element.dataset["a"] == undefined, "Deleting a property known to be in the dataset should return true.");
	assert_true(delete element.dataset["c"], "Deleting a property known NOT to be in the dataset should return true.");
	assert_true(delete element.dataset["-invalid"], "Deleting a property known NOT to be in the dataset and invalid should return true.");
	}, "Test that the return value of deleting properties is correct ([OverrideBuiltins] specified).");

	test(() => {
	let element = document.createElement("div");
	element.dataset[1] = "value1";
	element.dataset[2] = "value2";

	assert_true(delete element.dataset[1], "Deleting a numeric property known to be in the dataset should return true.");
	assert_equals(element.dataset[1], undefined, "Deleting a numeric property known to be in the dataset should remove the property.");
	assert_true(delete element.dataset[3], "Deleting a numeric property known NOT to be in the dataset should return true.");
	}, "Test that the return value of deleting numeric properties is correct ([OverrideBuiltins] specified).");

	test((t) => {
	t.add_cleanup(() => {
	delete DOMStringMap.prototype["customProperty"];
	});

	let element = document.createElement("div");

	DOMStringMap.prototype["customProperty"] = 'prototype-value';
	assert_true(delete element.dataset["customProperty"], "");
	assert_equals(DOMStringMap.prototype["customProperty"], 'prototype-value');
	}, "Test that deleting a property that does not exist in the map, but does on the prototype, will return true and not remove the property from the prototype ([OverrideBuiltins] specified).");

	// To test a named property deleter without [OverrideBuiltins] specified, we use Storage via window.sessionStorage.
	test((t) => {
	t.add_cleanup(() => {
	window.sessionStorage.clear();
	});

	window.sessionStorage.clear();
	assert_equals(window.sessionStorage.length, 0);

	window.sessionStorage["a"] = "value1";
	window.sessionStorage["b"] = "value2";

	assert_true(delete window.sessionStorage["a"], "Deleting a property known to be in the dataset should return true.");
	assert_true(window.sessionStorage["a"] == undefined, "Deleting a property known to be in the dataset should return true.");
	assert_true(delete window.sessionStorage["c"], "Deleting a property known NOT to be in the dataset should return true.");
	}, "Test that the return value of deleting properties is correct ([OverrideBuiltins] not specified).");

	test((t) => {
	t.add_cleanup(() => {
	window.sessionStorage.clear();
	});

	window.sessionStorage.clear();
	assert_equals(window.sessionStorage.length, 0);

	window.sessionStorage[1] = "value1";
	window.sessionStorage[2] = "value2";

	assert_true(delete window.sessionStorage[1], "Deleting a numeric property known to be in the dataset should return true.");
	assert_equals(window.sessionStorage[1], undefined, "Deleting a numeric property known to be in the dataset should remove the property.");
	assert_true(delete window.sessionStorage[3], "Deleting a numeric property known NOT to be in the dataset should return true.");
	}, "Test that the return value of deleting numeric properties is correct ([OverrideBuiltins] not specified).");

	test((t) => {
	t.add_cleanup(() => {
	window.sessionStorage.clear();
	});

	window.sessionStorage.clear();
	assert_equals(window.sessionStorage.length, 0);

	window.sessionStorage['a'] = "value1";
	window.sessionStorage['b'] = "value2";

	// First note that trying to set the builtin, length in this case, does not work.
	let currentLength = window.sessionStorage['length'];
	window.sessionStorage['length'] = 'value3';
	assert_equals(window.sessionStorage['length'], currentLength);

	// Attempting to delete it also does not work.
	assert_true(delete window.sessionStorage['length'], "Deleting a builtin property returns true.");
	assert_equals(window.sessionStorage['length'], currentLength);
	}, "Test that you can't delete a builtin property ([OverrideBuiltins] not specified).");

	test((t) => {
	t.add_cleanup(() => {
	window.sessionStorage.clear();
	delete Storage.prototype["customProperty"];
	});

	Storage.prototype["customProperty"] = 'prototype-value';
	assert_true(delete window.sessionStorage["customProperty"], "Deleting the a property known to exist on the prototype but not in the map should return true.");
	assert_equals(Storage.prototype["customProperty"], 'prototype-value');

	}, "Test that deleting a property that does not exist in the map, but does on the prototype, will return true and not remove the property from the prototype ([OverrideBuiltins] not specified).");
	</script>
	</body>
	</html>