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Test Info:

<!doctype html>
<meta charset="utf-8">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/dummy.js?pipe=trickle(d1)"></script>
<link rel="stylesheet" media="print" href="resources/dummy.css?print">
<link rel="stylesheet" href="resources/dummy.css?non-print">
let t = async_test("Non-matching link media is not preloaded");
window.addEventListener("load", t.step_func_done(function() {
let entries = performance.getEntriesByType('resource');
let found_print = null;
let found_non_print = null;
for (let entry of entries) {
if ("?print")) {
assert_equals(found_print, null);
found_print = entry.startTime;
if ("?non-print")) {
assert_equals(found_non_print, null);
found_non_print = entry.startTime;
assert_not_equals(found_print, null, "Should've loaded print sheet");
assert_not_equals(found_non_print, null, "Should've loaded non-print sheet");
// We can assert_greater_than (rather than greater_than_equal) because if
// the non-print sheet has been preloaded but the print one hasn't, we have
// the trickle mechanism to try to guarantee that enough time has passed
// between one load and the next.
assert_greater_than(found_print, found_non_print, "Non-print sheet should've started loading before print sheet")