File: bug1529492-1.html

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<!DOCTYPE html>
<!-- This test relies on caret browsing being enabled. -->
<html class="reftest-wait">
<script src="/tests/SimpleTest/EventUtils.js"></script>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<style>
.parent {
  font: 32px monospace;
  width: 26ch;
  overflow: hidden;
}
#child {
  transform: scaleX(0.5);
  transform-origin: 0 0;
  outline: none;
}
</style>
<div class="parent"><div id="child">.BCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz</div></div>
<script>
SimpleTest.waitForFocus(function() {
  let r = document.createRange();
  let t = child.firstChild;

  // With a scale of 0.5, the bug manifests by limiting the caret's position
  // to half way through the text.  Place the selection somewhere past that.
  r.setStart(t, 30);
  r.setEnd(t, 30);

  let sel = getSelection();
  sel.empty();
  sel.addRange(r);

  document.documentElement.removeAttribute("class");
});
</script>