<!DOCTYPE HTML>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1">
<link rel="stylesheet" href="/tests/SimpleTest/test.css" />
<style>
html,body {
  margin: 0;
  padding: 0;
}
#target {
  position: absolute;
  top: 150px;
  left: 150px;
  width: 100px;
  height: 100px;
  background-color: blue;
}
</style>
<div id="target"></div>
<script>
const isfuzzy = opener.isfuzzy.bind(opener);
const add_task = opener.add_task.bind(opener);
const original_finish = opener.SimpleTest.finish;
const SimpleTest = opener.SimpleTest;
SimpleTest.finish = function finish() {
  self.close();
  original_finish();
};
add_task(async () => {
  await SpecialPowers.pushPrefEnv({'set': [['layout.css.devPixelsPerPx', 1.5]]});
  SpecialPowers.setFullZoom(window, 2.0);

  const rect = target.getBoundingClientRect();
  const screenPixelsPerCSSPixel = window.devicePixelRatio;

  let rectOnScreen =
    SpecialPowers.DOMWindowUtils.toScreenRect(rect.x, rect.y, rect.width, rect.height);
  isfuzzy(rectOnScreen.x,
     rect.x * screenPixelsPerCSSPixel +
     window.mozInnerScreenX * screenPixelsPerCSSPixel, 0.01, "x");
  isfuzzy(rectOnScreen.y,
     rect.y * screenPixelsPerCSSPixel +
     window.mozInnerScreenY * screenPixelsPerCSSPixel, 0.01, "y");

  isfuzzy(rectOnScreen.width, rect.width * screenPixelsPerCSSPixel, 0.01, "width");
  isfuzzy(rectOnScreen.height, rect.height * screenPixelsPerCSSPixel, 0.01, "height");
});
</script>
