zoomed-baseline-shift.html | Explore in Territory

<!doctype html>
<title>Test that baseline-shift is unaffected by zoom level</title>
<script src="../../resources/ahem.js"></script>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<svg width="250" height="140" viewBox="0 0 250 140"
     xmlns="http://www.w3.org/2000/svg" version="1.1">
  <style>
    text {
        font-family: ahem;
        font-size: 20px;
    }
  </style>
  <text x="15" y="40">before<tspan>inter</tspan>after</text>
  <script>
    var baselineShiftValues = ["10px", "-50%"]; // Shift half a step up or down
    var zoomLevels = [1, 4, 16];

    var html = document.documentElement;
    baselineShiftValues.forEach(function (baselineShiftValue) {
        document.querySelector('tspan').setAttribute('baseline-shift', baselineShiftValue);
        zoomLevels.forEach(function (zoom) {
            html.style.zoom = zoom;
            var baselineShiftDelta = (document.querySelector('text').getStartPositionOfChar(0).y -
                document.querySelector('tspan').getStartPositionOfChar(0).y);
            test(function () {
                assert_equals(Math.abs(baselineShiftDelta), 10, "Baseline half a font-size up or down");
            }, "Text bounds height at zoom " + zoom + " with baseline-shift=" + baselineShiftValue);
        });
    });
    html.style.zoom = 1;
    // Clean up to avoid being classified as a text test; avoids an -expected.txt file.
    document.querySelector('text').remove();
  </script>
</svg>
chromium/third_party/blink/web_tests/svg/custom/zoomed-baseline-shift.html
