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chromium/third_party/blink/web_tests/external/wpt/navigation-api/navigation-methods/return-value/navigate.html 

<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/helpers.js"></script>

<script>
promise_test(async t => {
  const result = navigation.navigate("#1");
  await assertBothFulfill(t, result, navigation.currentEntry);
  assert_equals((new URL(navigation.currentEntry.url)).hash, "#1");
}, "navigate() promises");
</script>