49 lines
1.6 KiB
HTML
49 lines
1.6 KiB
HTML
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<!DOCTYPE html>
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<html>
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<head>
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<script src="../../resources/testharness.js"></script>
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<script src="../../resources/testharnessreport.js"></script>
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</head>
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<body>
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<script>
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const originalIterator = Object.getOwnPropertyDescriptor(Array.prototype, Symbol.iterator);
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test(() => {
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let callCount = 0;
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let array = [2.0, 0.0, 0.0, 2.0, 10.0, 10.0];
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Object.defineProperty(array, Symbol.iterator, {
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get() {
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++callCount;
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return originalIterator.value;
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}
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});
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let matrix = new DOMMatrix(array);
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assert_equals(callCount, 1, "@@iterator must only be accessed once.");
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assert_equals(matrix.toString(), "matrix(2, 0, 0, 2, 10, 10)", "DOMMatrix constructor should work correctly.");
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}, "@@iterator should only be accessed once, tested via replacement of @@iterator on instance.");
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test((t) => {
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t.add_cleanup(() => {
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Object.defineProperty(Array.prototype, Symbol.iterator, originalIterator);
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});
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let callCount = 0;
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const array = [2.0, 0.0, 0.0, 2.0, 10.0, 10.0];
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Object.defineProperty(Array.prototype, Symbol.iterator, {
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get() {
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++callCount;
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return originalIterator.value;
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}
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});
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let matrix = new DOMMatrix(array);
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assert_equals(callCount, 1, "@@iterator must only be accessed once.");
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assert_equals(matrix.toString(), "matrix(2, 0, 0, 2, 10, 10)", "DOMMatrix constructor should work correctly.");
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}, "@@iterator should only be accessed once, tested via replacement of @@iterator on prototype.");
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</script>
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</body>
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</html>
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