| <!DOCTYPE HTML> |
| <html> |
| <head> |
| <meta charset="utf-8" /> |
| <link rel="author" title="Intel" href="http://www.intel.com/" /> |
| <link rel="help" href="http://www.w3.org/TR/resource-timing/#performanceresourcetiming"/> |
| <title>This test validates the functionality of onresourcetimingbufferfull in resource timing.</title> |
| <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 = 2; |
| let bufferFullCount = 0; |
| let eventFired = false; |
| setup(() => { |
| clearBufferAndSetSize(resource_timing_buffer_size); |
| performance.addEventListener('resourcetimingbufferfull', e => { |
| assert_equals(e.bubbles, false, "Event bubbles attribute is false"); |
| bufferFullCount++; |
| eventFired = true; |
| }); |
| }); |
| |
| let overflowTheBuffer = () => { |
| return new Promise(resolve => { |
| // This resource overflows the entry buffer, and goes into the secondary buffer. |
| appendScript('resources/empty_script.js', resolve); |
| }); |
| }; |
| |
| let testThatBufferContainsTheRightResources = () => { |
| assert_equals(performance.getEntriesByType('resource').length, resource_timing_buffer_size, 'There should only be |bufferSize| resource entries.'); |
| assert_equals(bufferFullCount, 1, 'onresourcetimingbufferfull should have been invoked once.'); |
| }; |
| |
| promise_test(async () => { |
| await fillUpTheBufferWithTwoResources('resources/empty.js'); |
| await overflowTheBuffer(); |
| await waitForEventToFire(); |
| testThatBufferContainsTheRightResources(); |
| }, "Test that a buffer full event does not bubble and that resourcetimingbufferfull is called only once per overflow"); |
| </script> |
| </body> |
| </html> |
