1 files changed, 30 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.emHeights-low-ascent.worker.js b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.emHeights-low-ascent.worker.js
new file mode 100644
index 0000000000..09ee787309
--- /dev/null
+++ b/testing/web-platform/tests/html/canvas/offscreen/text/2d.text.measure.emHeights-low-ascent.worker.js
@@ -0,0 +1,30 @@
+// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
+// OffscreenCanvas test in a worker:2d.text.measure.emHeights-low-ascent
+// Description:Testing emHeights with reduced ascent 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-ascent256", "url('/fonts/CanvasTest-ascent256.ttf')");
+  f.load();
+  self.fonts.add(f);
+  await self.fonts.ready;
+  ctx.font = '40px CanvasTest-ascent256';
+  ctx.direction = 'ltr';
+  ctx.align = 'left'
+  _assertSame(ctx.measureText('A').emHeightAscent, 20, "ctx.measureText('A').emHeightAscent", "20");
+  _assertSame(ctx.measureText('A').emHeightDescent, 20, "ctx.measureText('A').emHeightDescent", "20");
+  _assertSame(ctx.measureText('A').emHeightDescent + ctx.measureText('A').emHeightAscent, 40, "ctx.measureText('A').emHeightDescent + ctx.measureText('A').emHeightAscent", "40");
+
+  _assertSame(ctx.measureText('ABCD').emHeightAscent, 20, "ctx.measureText('ABCD').emHeightAscent", "20");
+  _assertSame(ctx.measureText('ABCD').emHeightDescent, 20, "ctx.measureText('ABCD').emHeightDescent", "20");
+  _assertSame(ctx.measureText('ABCD').emHeightDescent + ctx.measureText('ABCD').emHeightAscent, 40, "ctx.measureText('ABCD').emHeightDescent + ctx.measureText('ABCD').emHeightAscent", "40");
+  t.done();
+}, "Testing emHeights with reduced ascent metric");
+done();