measure_associated_with_navigation_timing.html (4009B)
1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="utf-8" /> 5 <title>functionality test of window.performance.measure</title> 6 <link rel="author" title="Intel" href="http://www.intel.com/" /> 7 <link rel="help" href="http://www.w3.org/TR/user-timing/#extensions-performance-interface"/> 8 <script src="/resources/testharness.js"></script> 9 <script src="/resources/testharnessreport.js"></script> 10 <script src="/common/performance-timeline-utils.js"></script> 11 <script src="resources/webperftestharness.js"></script> 12 <script src="resources/webperftestharnessextension.js"></script> 13 <script> 14 setup({ explicit_done: true }); 15 16 function onload_test() 17 { 18 const measures_for_timing_order = [ 19 ['nav2now', 'navigationStart'], 20 ['loadTime', 'navigationStart', 'loadEventEnd'], 21 ['loadEventEnd2a', 'loadEventEnd', 'abc'], 22 ['nav2a', 'navigationStart', 'abc'], 23 ['domComplete2a', 'domComplete', 'abc'], 24 ['negativeValue', 1, 'navigationStart'], 25 ]; 26 const context = new PerformanceContext(window.performance); 27 28 mark_names.forEach(function(name) { 29 context.mark(name); 30 }); 31 measures_for_timing_order.forEach(context.initialMeasures, context); 32 test_greater_than(context.getEntriesByName('nav2now', 'measure')[0].duration, 0, 'Measure of navigationStart to now should be positive value.'); 33 test_greater_than(context.getEntriesByName('loadTime', 'measure')[0].duration, 0, 'Measure of navigationStart to loadEventEnd should be positive value.'); 34 test_greater_than(0, context.getEntriesByName('negativeValue', 'measure')[0].duration, 'Measure of current mark to navigationStart should be negative value.'); 35 test_equals(context.getEntriesByName('loadTime', 'measure')[0].duration + context.getEntriesByName('loadEventEnd2a', 'measure')[0].duration, context.getEntriesByName('nav2a', 'measure')[0].duration, 'loadTime plus loadEventEnd to a mark "a" should equal to navigationStart to "a".'); 36 37 // We later assert that time has passed between setting one set of marks and another set. 38 // However, this assertion will fail if the test executes fast enough such that the marks occur 39 // at the same clock time. This is more likely in browsers such as Firefox that reduce the 40 // precision of the clock exposed through this API to mitigate timing attacks. To mitigate the 41 // test failure, we sleep. Firefox may round timestamps to the nearest millisecond in either 42 // direction - e.g. 10ms & 11.999ms may both round to 11ms - so we need to sleep at least 2ms to 43 // avoid test failures. To be safe, we sleep 3ms. 44 sleep_milliseconds(3); 45 46 // Following cases test for scenarios that measure names are tied twice. 47 mark_names.forEach(function(name) { 48 context.mark(name); 49 }); 50 measures_for_timing_order.forEach(context.initialMeasures, context); 51 52 test_greater_than(context.getEntriesByName('nav2now', 'measure')[1].duration, context.getEntriesByName('nav2now', 'measure')[0].duration, 'Second measure of current mark to navigationStart should be negative value.'); 53 test_equals(context.getEntriesByName('loadTime', 'measure')[0].duration, context.getEntriesByName('loadTime', 'measure')[1].duration, 'Measures of loadTime should have same duration.'); 54 test_greater_than(context.getEntriesByName('domComplete2a', 'measure')[1].duration, context.getEntriesByName('domComplete2a', 'measure')[0].duration, 'Measure from domComplete event to most recent mark "a" should have longer duration.'); 55 test_greater_than(context.getEntriesByName('negativeValue', 'measure')[0].duration, context.getEntriesByName('negativeValue', 'measure')[1].duration, 'Measure from most recent mark to navigationStart should have longer duration.'); 56 57 done(); 58 } 59 </script> 60 </head> 61 <body onload="setTimeout(onload_test,0)"> 62 <h1>Description</h1> 63 <p>This test validates functionality of the interface window.performance.measure using keywords from the Navigation Timing spec.</p> 64 <div id="log"></div> 65 </body> 66 </html>