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<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<iframe id="i"></iframe>
<script>
promise_test(async t => {
  // Wait for after the load event so that the navigation doesn't get converted
  // into a replace navigation.
  await new Promise(resolve => window.onload = () => t.step_timeout(resolve, 0));

  assert_equals(i.contentWindow.navigation.activation, null);

  i.contentWindow.navigation.navigate("/common/blank.html?a");
  await new Promise(resolve => i.onload = () => t.step_timeout(resolve, 0));

  assert_equals(i.contentWindow.navigation.entries().length, 1);
  assert_equals(i.contentWindow.navigation.activation.entry,
                i.contentWindow.navigation.currentEntry);
  assert_equals(i.contentWindow.navigation.activation.from.url, "about:blank");
  assert_equals(i.contentWindow.navigation.activation.from.index, -1);
  assert_equals(i.contentWindow.navigation.activation.navigationType, "replace");
}, "navigation.activation interaction with initial about:blank");
</script>