| <!DOCTYPE HTML> |
| <html> |
| <head onload> |
| <meta charset="utf-8" /> |
| <title>This test validates that synchronously adding entries in onresourcetimingbufferfull callback results in these entries being properly handled.</title> |
| <link rel="help" href="http://www.w3.org/TR/resource-timing/#performanceresourcetiming"/> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="resources/buffer-full-utilities.js"></script> |
| </head> |
| <body> |
| <script> |
| const resource_timing_buffer_size = 1; |
| |
| setup(() => { |
| // Get the browser into a consistent state. |
| clearBufferAndSetSize(resource_timing_buffer_size); |
| performance.addEventListener('resourcetimingbufferfull', () => { assert_unreached("resourcetimingbufferfull should not fire")}); |
| }); |
| |
| let overflowTheBuffer = () => { |
| // These resources overflow the entry buffer, and go into the secondary buffer. |
| xhrScript('resources/empty.js?xhr2'); |
| xhrScript('resources/empty.js?xhr3'); |
| performance.clearResourceTimings(); |
| performance.setResourceTimingBufferSize(3); |
| xhrScript('resources/empty.js?xhr4'); |
| window.entriesAfterAddition = performance.getEntriesByType('resource'); |
| }; |
| |
| let testThatBufferContainsTheRightResources = () => { |
| let entries = performance.getEntriesByType('resource'); |
| assert_equals(entries.length, 3, |
| 'the last 3 resources should be in the buffer, since the first one was cleared'); |
| assert_true(entries[0].name.includes('empty.js?xhr2'), "empty.js?xhr2 is in the entries buffer"); |
| assert_true(entries[1].name.includes('empty.js?xhr3'), "empty.js?xhr3 is in the entries buffer"); |
| assert_true(entries[2].name.includes('empty.js?xhr4'), "empty.js?xhr4 is in the entries buffer"); |
| assert_equals(entriesAfterAddition.length, 0, "No entries should have been added to the primary buffer before the task to 'fire a buffer full event'."); |
| }; |
| |
| promise_test(async () => { |
| await fillUpTheBufferWithSingleResource("resources/empty.js"); |
| overflowTheBuffer(); |
| await waitForNextTask(); |
| testThatBufferContainsTheRightResources(); |
| }, "Test that if the buffer is cleared after entries were added to the secondary buffer, those entries make it into the primary one"); |
| </script> |
| </body> |
| </html> |
