81 lines
3.1 KiB
JavaScript
81 lines
3.1 KiB
JavaScript
promise_test(t => {
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// This setup is required for later tests as well.
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// Await for a dropped entry.
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return new Promise(res => {
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// Set a buffer size of 0 so that new resource entries count as dropped.
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performance.setResourceTimingBufferSize(0);
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// Use an observer to make sure the promise is resolved only when the
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// new entry has been created.
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new PerformanceObserver(res).observe({type: 'resource'});
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fetch('resources/square.png?id=1');
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}).then(() => {
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return new Promise(resolve => {
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new PerformanceObserver(t.step_func((entries, obs, options) => {
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assert_equals(options['droppedEntriesCount'], 0);
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resolve();
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})).observe({type: 'mark'});
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performance.mark('test');
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})});
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}, 'Dropped entries count is 0 when there are no dropped entries of relevant type.');
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promise_test(async t => {
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return new Promise(resolve => {
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new PerformanceObserver(t.step_func((entries, obs, options) => {
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assert_equals(options['droppedEntriesCount'], 1);
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resolve();
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})).observe({entryTypes: ['mark', 'resource']});
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performance.mark('meow');
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});
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}, 'Dropped entries correctly counted with multiple types.');
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promise_test(t => {
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return new Promise(resolve => {
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new PerformanceObserver(t.step_func((entries, obs, options) => {
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assert_equals(options['droppedEntriesCount'], 1,
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'There should have been some dropped resource timing entries at this point');
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resolve();
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})).observe({type: 'resource', buffered: true});
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});
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}, 'Dropped entries counted even if observer was not registered at the time.');
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promise_test(t => {
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return new Promise(resolve => {
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let callback_ran = false;
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new PerformanceObserver(t.step_func((entries, obs, options) => {
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if (!callback_ran) {
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assert_equals(options['droppedEntriesCount'], 2,
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'There should be two dropped entries right now.');
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fetch('resources/square.png?id=3');
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callback_ran = true;
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} else {
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assert_equals(options['droppedEntriesCount'], undefined,
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'droppedEntriesCount should be unset after the first callback!');
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resolve();
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}
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})).observe({type: 'resource'});
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fetch('resources/square.png?id=2');
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});
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}, 'Dropped entries only surfaced on the first callback.');
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promise_test(t => {
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return new Promise(resolve => {
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let callback_ran = false;
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let droppedEntriesCount = -1;
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new PerformanceObserver(t.step_func((entries, obs, options) => {
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if (!callback_ran) {
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assert_greater_than(options['droppedEntriesCount'], 0,
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'There should be several dropped entries right now.');
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droppedEntriesCount = options['droppedEntriesCount'];
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callback_ran = true;
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obs.observe({type: 'mark'});
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performance.mark('woof');
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} else {
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assert_equals(options['droppedEntriesCount'], droppedEntriesCount,
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'There should be droppedEntriesCount due to the new observe().');
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resolve();
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}
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})).observe({type: 'resource'});
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fetch('resources/square.png?id=4');
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});
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}, 'Dropped entries surfaced after an observe() call!');
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