// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
// OffscreenCanvas test in a worker:2d.text.measure.emHeights-zero-descent
// Description:Testing emHeights with zero descent metric
// Note:

importScripts("/resources/testharness.js");
importScripts("/html/canvas/resources/canvas-tests.js");

promise_test(async t => {
  var canvas = new OffscreenCanvas(100, 50);
  var ctx = canvas.getContext('2d');

  var f = new FontFace("CanvasTest-descent0", "url('/fonts/CanvasTest-descent0.ttf')");
  f.load();
  self.fonts.add(f);
  await self.fonts.ready;
  ctx.font = '40px CanvasTest-descent0';
  ctx.direction = 'ltr';
  ctx.align = 'left'
  _assertSame(ctx.measureText('A').emHeightAscent, 40, "ctx.measureText('A').emHeightAscent", "40");
  _assertSame(ctx.measureText('A').emHeightDescent, 0, "ctx.measureText('A').emHeightDescent", "0");
  _assertSame(ctx.measureText('A').emHeightDescent + ctx.measureText('A').emHeightAscent, 40, "ctx.measureText('A').emHeightDescent + ctx.measureText('A').emHeightAscent", "40");

  _assertSame(ctx.measureText('ABCD').emHeightAscent, 40, "ctx.measureText('ABCD').emHeightAscent", "40");
  _assertSame(ctx.measureText('ABCD').emHeightDescent, 0, "ctx.measureText('ABCD').emHeightDescent", "0");
  _assertSame(ctx.measureText('ABCD').emHeightDescent + ctx.measureText('ABCD').emHeightAscent, 40, "ctx.measureText('ABCD').emHeightDescent + ctx.measureText('ABCD').emHeightAscent", "40");
}, "Testing emHeights with zero descent metric");
done();
