<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Radical parameters</title>
<link rel="help" href="https://w3c.github.io/mathml-core/#radicals-msqrt-mroot">
<meta name="assert" content="Test edge kerning values for radicals.">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/mathml/support/feature-detection.js"></script>
<script src="/mathml/support/fonts.js"></script>
<style>
  @font-face {
      font-family: radical-negativekernbeforedegree1000-rulethickness1000;
      src: url("/fonts/math/radical-negativekernbeforedegree1000-rulethickness1000.woff");
  }
  @font-face {
      font-family: radical-kernafterdegreeminus5000-rulethickness1000;
      src: url("/fonts/math/radical-kernafterdegreeminus5000-rulethickness1000.woff");
  }
  math, mspace {
      font-size: 10px;
  }
  mspace {
      opacity: .5;
  }
</style>
<script>
  var emToPx = 10 / 1000; // font-size: 10px, font.em = 1000
  var epsilon = 1;

  function getBox(aId) {
    return document.getElementById(aId).getBoundingClientRect();
  }

  function runTests() {
      test(function() {
          assert_true(MathMLFeatureDetection.has_mspace());
          assert_approx_equals(getBox("index001").left - getBox("mroot001").left,
                               0, epsilon, "should be clamped to 0");
      }, "RadicalKernBeforeDegree = -1em < 0");

      test(function() {
          assert_true(MathMLFeatureDetection.has_mspace());
          var radicalSymbolWidth = 1000 * emToPx;
          var radicalLeft = getBox("base002").left - radicalSymbolWidth;
          assert_approx_equals(getBox("index002").right - radicalLeft,
                               30, epsilon, "should be clamped to 3em");
      }, "RadicalKernBeforeAfterDegree = -5em < -3em = -degree's inline size");

      done();
  }

  setup({ explicit_done: true });
  window.addEventListener("load", () => { loadAllFonts().then(runTests); });

</script>
</head>
<body>
  <div id="log"></div>
  <p>
    <math style="font-family: radical-negativekernbeforedegree1000-rulethickness1000">
      <mroot id="mroot001">
        <mspace id="base001" height="6em" width="6em" style="background: blue"/>
        <mspace id="index001" height="6em" width="6em" style="background: green"/>
      </mroot>
    </math>
  </p>
  <hr/>
  <p>
    <math style="font-family: radical-kernafterdegreeminus5000-rulethickness1000">
      <mroot id="mroot002">
        <mspace id="base002" height="3em" width="3em" style="background: blue"/>
        <mspace id="index002" height="3em" width="3em" style="background: green"/>
      </mroot>
    </math>
  </p>
</body>
</html>
