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