border-width-rounding.tentative.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /css/css-borders/border-width-rounding.tentative.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<head>

  <title>

    CSS Border: width rounding

  </title>

  <link rel="author" title="Traian Captan" href="mailto:tcaptan@chromium.org">

  <link rel="help" href="https://www.w3.org/TR/css-backgrounds-3/#border-width">

  <meta name="assert" content="border-width computed value after rounding.">

  <script src="/resources/testharness.js"></script>

  <script src="/resources/testharnessreport.js"></script>

</head>

<body>

  <h1>

    Test passes if border widths are rounded up

    when they are greater than 0 and less than 1,

    and rounded down when they are greater than 1.

  </h1>

  <script>

    const values = [

      { input: "0px", expected: "0px" },

      { input: "0.1px", expected: "1px" },

      { input: "0.25px", expected: "1px" },

      { input: "0.5px", expected: "1px" },

      { input: "0.9px", expected: "1px" },

      { input: "1px", expected: "1px" },

      { input: "1.25px", expected: "1px" },

      { input: "1.5px", expected: "1px" },

      { input: "2px", expected: "2px" },

      { input: "2.75px", expected: "2px" },

      { input: "2.999px", expected: "2px" },

];

    for (const value of values) {

      const div = document.createElement("div");

      div.style = `border: solid ${value.input} blue; margin-bottom: 20px;`;

      document.body.appendChild(div);

    test(function() {

      var targets = document.querySelectorAll("div");

      for (var i=0; i < targets.length; ++i) {

        assert_equals(getComputedStyle(targets[i]).borderWidth, values[i].expected);

    }, "Test that border widths are rounded up when they are greater than 0px but less than 1px, and rounded down when they are greater than 1px.");

    </script>

</body>

</html>