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77 lines
2.2 KiB
JavaScript
77 lines
2.2 KiB
JavaScript
// Compares a mutation record to a predefined one
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// mutationToCheck is a mutation record from the user agent
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// expectedRecord is a mutation record minted by the test
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// for expectedRecord, if properties are ommitted, they get default ones
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function checkRecords(target, mutationToCheck, expectedRecord) {
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var mr1;
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var mr2;
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function checkField(property, isArray) {
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var field = mr2[property];
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if (isArray === undefined) {
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isArray = false;
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}
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if (field instanceof Function) {
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field = field();
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} else if (field === undefined) {
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if (isArray) {
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field = new Array();
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} else {
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field = null;
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}
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}
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if (isArray) {
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assert_array_equals(mr1[property], field, property + " didn't match");
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} else {
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assert_equals(mr1[property], field, property + " didn't match");
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}
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}
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assert_equals(mutationToCheck.length, expectedRecord.length, "mutation records must match");
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for (var item = 0; item < mutationToCheck.length; item++) {
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mr1 = mutationToCheck[item];
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mr2 = expectedRecord[item];
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if (mr2.target instanceof Function) {
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assert_equals(mr1.target, mr2.target(), "target node must match");
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} else if (mr2.target !== undefined) {
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assert_equals(mr1.target, mr2.target, "target node must match");
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} else {
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assert_equals(mr1.target, target, "target node must match");
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}
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checkField("type");
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checkField("addedNodes", true);
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checkField("removedNodes", true);
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checkField("previousSibling");
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checkField("nextSibling");
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checkField("attributeName");
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checkField("attributeNamespace");
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checkField("oldValue");
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};
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}
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function runMutationTest(node, mutationObserverOptions, mutationRecordSequence, mutationFunction, description, target) {
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var test = async_test(description);
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function moc(mrl, obs) {
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test.step(
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function () {
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if (target === undefined) target = node;
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checkRecords(target, mrl, mutationRecordSequence);
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test.done();
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}
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);
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}
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test.step(
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function () {
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(new MutationObserver(moc)).observe(node, mutationObserverOptions);
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mutationFunction();
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}
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);
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return mutationRecordSequence.length
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}
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