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// Compares a performance entry to a predefined one
// perfEntriesToCheck is an array of performance entries from the user agent
// expectedEntries is an array of performance entries minted by the test
function checkEntries(perfEntriesToCheck, expectedEntries) {
function findMatch(pe) {
// we match based on entryType and name
for (var i = expectedEntries.length - 1; i >= 0; i--) {
var ex = expectedEntries[i];
if (ex.entryType === pe.entryType && ex.name === pe.name) {
return ex;
}
}
return null;
}
assert_equals(perfEntriesToCheck.length, expectedEntries.length, "performance entries must match");
perfEntriesToCheck.forEach(function (pe1) {
assert_not_equals(findMatch(pe1), null, "Entry matches");
});
}
// Waits for performance.now to advance. Since precision reduction might
// cause it to return the same value across multiple calls.
function wait() {
var now = performance.now();
while (now === performance.now())
continue;
}
// Ensure the entries list is sorted by startTime.
function checkSorted(entries) {
assert_not_equals(entries.length, 0, "entries list must not be empty");
if (!entries.length)
return;
var sorted = false;
var lastStartTime = entries[0].startTime;
for (var i = 1; i < entries.length; ++i) {
var currStartTime = entries[i].startTime;
assert_less_than_equal(lastStartTime, currStartTime, "entry list must be sorted by startTime");
lastStartTime = currStartTime;
}
}
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