| <!DOCTYPE html> |
| <html> |
| <head> |
| <script src="../../../resources/js-test.js"></script> |
| </head> |
| <body> |
| <p> |
| Tests that window.devicePixelRatio is updated on zoom. |
| </p> |
| <script> |
| // testRunner.zoomPageOut/In zooms with a fixed factor of 1.2 instead |
| // of the zoom levels of the actual browser. |
| var ZOOM_MULTIPLIER = 1.2; |
| |
| function round(n) |
| { |
| return Math.round(n * 100) / 100; |
| } |
| |
| var expectedRatio = window.devicePixelRatio; |
| if (window.testRunner) { |
| for (var i = 0; i < 5; i++) { |
| testRunner.zoomPageOut(); |
| expectedRatio /= ZOOM_MULTIPLIER; |
| shouldBe('round(window.devicePixelRatio)', String(round(expectedRatio))); |
| } |
| for (var i = 0; i < 10; i++) { |
| testRunner.zoomPageIn(); |
| expectedRatio *= ZOOM_MULTIPLIER; |
| shouldBe('round(window.devicePixelRatio)', String(round(expectedRatio))); |
| } |
| } |
| </script> |
| </body> |
| </html> |
