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40 lines
1.9 KiB
HTML
40 lines
1.9 KiB
HTML
<!DOCTYPE HTML>
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<meta charset=utf-8>
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<title>UserTiming L3: Measure basic usage</title>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script>
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function endTime(entry) {
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return entry.startTime + entry.duration;
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}
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test(function() {
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performance.clearMarks();
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performance.clearMeasures();
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const markEntry = performance.mark("mark", {startTime: 123});
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const measureEntry = performance.measure("A", undefined, "mark");
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assert_equals(measureEntry.startTime, 0);
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assert_equals(endTime(measureEntry), markEntry.startTime);
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}, "When the end mark is given and the start is unprovided, the end time of the measure entry should be the end mark's time, the start time should be 0.");
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test(function() {
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performance.clearMarks();
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performance.clearMeasures();
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const markEntry = performance.mark("mark", {startTime: 123});
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const endMin = performance.now();
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const measureEntry = performance.measure("A", "mark", undefined);
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const endMax = performance.now();
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assert_equals(measureEntry.startTime, markEntry.startTime);
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assert_greater_than_equal(endTime(measureEntry), endMin);
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assert_greater_than_equal(endMax, endTime(measureEntry));
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}, "When the start mark is given and the end is unprovided, the start time of the measure entry should be the start mark's time, the end should be now.");
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test(function() {
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performance.clearMarks();
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performance.clearMeasures();
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const markEntry = performance.mark("mark", {startTime: 123});
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const measureEntry = performance.measure("A", "mark", "mark");
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assert_equals(endTime(measureEntry), markEntry.startTime);
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assert_equals(measureEntry.startTime, markEntry.startTime);
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}, "When start and end mark are both given, the start time and end time of the measure entry should be the the marks' time, repectively");
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</script>
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