1 files changed, 66 insertions, 0 deletions
diff --git a/testing/web-platform/tests/user-timing/measure_associated_with_navigation_timing.html b/testing/web-platform/tests/user-timing/measure_associated_with_navigation_timing.html
new file mode 100644
index 0000000000..a874ad9172
--- /dev/null
+++ b/testing/web-platform/tests/user-timing/measure_associated_with_navigation_timing.html
@@ -0,0 +1,66 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8" />
+<title>functionality test of window.performance.measure</title>
+<link rel="author" title="Intel" href="http://www.intel.com/" />
+<link rel="help" href="http://www.w3.org/TR/user-timing/#extensions-performance-interface"/>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/performance-timeline-utils.js"></script>
+<script src="resources/webperftestharness.js"></script>
+<script src="resources/webperftestharnessextension.js"></script>
+<script>
+setup({ explicit_done: true });
+
+function onload_test()
+{
+    const measures_for_timing_order = [
+        ['nav2now', 'navigationStart'],
+        ['loadTime', 'navigationStart', 'loadEventEnd'],
+        ['loadEventEnd2a', 'loadEventEnd', 'abc'],
+        ['nav2a', 'navigationStart', 'abc'],
+        ['domComplete2a', 'domComplete', 'abc'],
+        ['negativeValue', 1, 'navigationStart'],
+    ];
+    const context = new PerformanceContext(window.performance);
+
+    mark_names.forEach(function(name) {
+        context.mark(name);
+    });
+    measures_for_timing_order.forEach(context.initialMeasures, context);
+    test_greater_than(context.getEntriesByName('nav2now', 'measure')[0].duration, 0, 'Measure of navigationStart to now should be positive value.');
+    test_greater_than(context.getEntriesByName('loadTime', 'measure')[0].duration, 0, 'Measure of navigationStart to loadEventEnd should be positive value.');
+    test_greater_than(0, context.getEntriesByName('negativeValue', 'measure')[0].duration, 'Measure of current mark to navigationStart should be negative value.');
+    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".');
+
+    // We later assert that time has passed between setting one set of marks and another set.
+    // However, this assertion will fail if the test executes fast enough such that the marks occur
+    // at the same clock time. This is more likely in browsers such as Firefox that reduce the
+    // precision of the clock exposed through this API to mitigate timing attacks. To mitigate the
+    // test failure, we sleep. Firefox may round timestamps to the nearest millisecond in either
+    // direction - e.g. 10ms & 11.999ms may both round to 11ms - so we need to sleep at least 2ms to
+    // avoid test failures. To be safe, we sleep 3ms.
+    sleep_milliseconds(3);
+
+    // Following cases test for scenarios that measure names are tied twice.
+    mark_names.forEach(function(name) {
+        context.mark(name);
+    });
+    measures_for_timing_order.forEach(context.initialMeasures, context);
+
+    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.');
+    test_equals(context.getEntriesByName('loadTime', 'measure')[0].duration, context.getEntriesByName('loadTime', 'measure')[1].duration, 'Measures of loadTime should have same duration.');
+    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.');
+    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.');
+
+    done();
+}
+</script>
+</head>
+<body onload="setTimeout(onload_test,0)">
+    <h1>Description</h1>
+    <p>This test validates functionality of the interface window.performance.measure using keywords from the Navigation Timing spec.</p>
+    <div id="log"></div>
+</body>
+</html>