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https://github.com/servo/servo.git
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179 lines
7 KiB
HTML
179 lines
7 KiB
HTML
<!doctype html>
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<meta charset=utf-8>
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<title></title>
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<script src=/resources/testharness.js></script>
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<script src=/resources/testharnessreport.js></script>
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<!-- We want to use a tag name that will not interact with our test harness,
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so just make one up. "foo" is a good one -->
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<!-- Ids that look like negative indices. These should come first, so we can
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assert that lookups for nonnegative indices find these by index -->
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<foo id="-2"></foo>
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<foo id="-1"></foo>
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<!-- Ids that look like nonnegative indices -->
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<foo id="0"></foo>
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<foo id="1"></foo>
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<!-- Ids that look like nonnegative indices near 2^31 = 2147483648 -->
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<foo id="2147483645"></foo> <!-- 2^31 - 3 -->
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<foo id="2147483646"></foo> <!-- 2^31 - 2 -->
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<foo id="2147483647"></foo> <!-- 2^31 - 1 -->
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<foo id="2147483648"></foo> <!-- 2^31 -->
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<foo id="2147483649"></foo> <!-- 2^31 + 1 -->
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<!-- Ids that look like nonnegative indices near 2^32 = 4294967296 -->
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<foo id="4294967293"></foo> <!-- 2^32 - 3 -->
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<foo id="4294967294"></foo> <!-- 2^32 - 2 -->
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<foo id="4294967295"></foo> <!-- 2^32 - 1 -->
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<foo id="4294967296"></foo> <!-- 2^32 -->
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<foo id="4294967297"></foo> <!-- 2^32 + 1 -->
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<script>
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test(function() {
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var collection = document.getElementsByTagName("foo");
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assert_equals(collection.item(-2), null);
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assert_equals(collection.item(-1), null);
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assert_equals(collection.namedItem(-2), document.getElementById("-2"));
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assert_equals(collection.namedItem(-1), document.getElementById("-1"));
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assert_equals(collection[-2], document.getElementById("-2"));
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assert_equals(collection[-1], document.getElementById("-1"));
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}, "Handling of property names that look like negative integers");
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test(function() {
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var collection = document.getElementsByTagName("foo");
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assert_equals(collection.item(0), document.getElementById("-2"));
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assert_equals(collection.item(1), document.getElementById("-1"));
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assert_equals(collection.namedItem(0), document.getElementById("0"));
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assert_equals(collection.namedItem(1), document.getElementById("1"));
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assert_equals(collection[0], document.getElementById("-2"));
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assert_equals(collection[1], document.getElementById("-1"));
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}, "Handling of property names that look like small nonnegative integers");
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test(function() {
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var collection = document.getElementsByTagName("foo");
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assert_equals(collection.item(2147483645), null);
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assert_equals(collection.item(2147483646), null);
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assert_equals(collection.item(2147483647), null);
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assert_equals(collection.item(2147483648), null);
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assert_equals(collection.item(2147483649), null);
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assert_equals(collection.namedItem(2147483645),
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document.getElementById("2147483645"));
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assert_equals(collection.namedItem(2147483646),
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document.getElementById("2147483646"));
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assert_equals(collection.namedItem(2147483647),
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document.getElementById("2147483647"));
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assert_equals(collection.namedItem(2147483648),
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document.getElementById("2147483648"));
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assert_equals(collection.namedItem(2147483649),
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document.getElementById("2147483649"));
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assert_equals(collection[2147483645], undefined);
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assert_equals(collection[2147483646], undefined);
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assert_equals(collection[2147483647], undefined);
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assert_equals(collection[2147483648], undefined);
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assert_equals(collection[2147483649], undefined);
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}, "Handling of property names that look like integers around 2^31");
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test(function() {
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var collection = document.getElementsByTagName("foo");
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assert_equals(collection.item(4294967293), null);
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assert_equals(collection.item(4294967294), null);
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assert_equals(collection.item(4294967295), null);
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assert_equals(collection.item(4294967296), document.getElementById("-2"));
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assert_equals(collection.item(4294967297), document.getElementById("-1"));
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assert_equals(collection.namedItem(4294967293),
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document.getElementById("4294967293"));
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assert_equals(collection.namedItem(4294967294),
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document.getElementById("4294967294"));
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assert_equals(collection.namedItem(4294967295),
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document.getElementById("4294967295"));
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assert_equals(collection.namedItem(4294967296),
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document.getElementById("4294967296"));
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assert_equals(collection.namedItem(4294967297),
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document.getElementById("4294967297"));
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assert_equals(collection[4294967293], undefined);
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assert_equals(collection[4294967294], undefined);
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assert_equals(collection[4294967295], document.getElementById("4294967295"));
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assert_equals(collection[4294967296], document.getElementById("4294967296"));
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assert_equals(collection[4294967297], document.getElementById("4294967297"));
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}, "Handling of property names that look like integers around 2^32");
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test(function() {
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var elements = document.getElementsByTagName("foo");
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var old_item = elements[0];
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var old_desc = Object.getOwnPropertyDescriptor(elements, 0);
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assert_equals(old_desc.value, old_item);
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assert_true(old_desc.enumerable);
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assert_true(old_desc.configurable);
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assert_false(old_desc.writable);
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elements[0] = 5;
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assert_equals(elements[0], old_item);
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assert_throws(new TypeError(), function() {
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"use strict";
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elements[0] = 5;
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});
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assert_throws(new TypeError(), function() {
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Object.defineProperty(elements, 0, { value: 5 });
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});
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delete elements[0];
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assert_equals(elements[0], old_item);
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assert_throws(new TypeError(), function() {
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"use strict";
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delete elements[0];
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});
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assert_equals(elements[0], old_item);
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}, 'Trying to set an expando that would shadow an already-existing indexed property');
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test(function() {
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var elements = document.getElementsByTagName("foo");
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var idx = elements.length;
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var old_item = elements[idx];
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var old_desc = Object.getOwnPropertyDescriptor(elements, idx);
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assert_equals(old_item, undefined);
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assert_equals(old_desc, undefined);
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// [[DefineOwnProperty]] will disallow defining an indexed expando.
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elements[idx] = 5;
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assert_equals(elements[idx], undefined);
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assert_throws(new TypeError(), function() {
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"use strict";
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elements[idx] = 5;
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});
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assert_throws(new TypeError(), function() {
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Object.defineProperty(elements, idx, { value: 5 });
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});
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// Check that deletions out of range do not throw
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delete elements[idx];
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(function() {
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"use strict";
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delete elements[idx];
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})();
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}, 'Trying to set an expando with an indexed property name past the end of the list');
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test(function(){
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var elements = document.getElementsByTagName("foo");
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var old_item = elements[0];
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var old_desc = Object.getOwnPropertyDescriptor(elements, 0);
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assert_equals(old_desc.value, old_item);
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assert_true(old_desc.enumerable);
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assert_true(old_desc.configurable);
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assert_false(old_desc.writable);
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Object.prototype[0] = 5;
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this.add_cleanup(function () { delete Object.prototype[0]; });
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assert_equals(elements[0], old_item);
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delete elements[0];
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assert_equals(elements[0], old_item);
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assert_throws(new TypeError(), function() {
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"use strict";
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delete elements[0];
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});
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assert_equals(elements[0], old_item);
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}, 'Trying to delete an indexed property name should never work');
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</script>
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