2d.text.measure.emHeights-zero-descent.worker.js (1512B)
1 // DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. 2 // OffscreenCanvas test in a worker:2d.text.measure.emHeights-zero-descent 3 // Description:Testing emHeights with zero descent metric 4 // Note: 5 6 importScripts("/resources/testharness.js"); 7 importScripts("/html/canvas/resources/canvas-tests.js"); 8 9 promise_test(async t => { 10 var canvas = new OffscreenCanvas(100, 50); 11 var ctx = canvas.getContext('2d'); 12 13 var f = new FontFace("CanvasTest-descent0", "url('/fonts/CanvasTest-descent0.ttf')"); 14 f.load(); 15 self.fonts.add(f); 16 await self.fonts.ready; 17 ctx.font = '40px CanvasTest-descent0'; 18 ctx.direction = 'ltr'; 19 ctx.align = 'left' 20 _assertSame(ctx.measureText('A').emHeightAscent, 40, "ctx.measureText('A').emHeightAscent", "40"); 21 _assertSame(ctx.measureText('A').emHeightDescent, 0, "ctx.measureText('A').emHeightDescent", "0"); 22 _assertSame(ctx.measureText('A').emHeightDescent + ctx.measureText('A').emHeightAscent, 40, "ctx.measureText('A').emHeightDescent + ctx.measureText('A').emHeightAscent", "40"); 23 24 _assertSame(ctx.measureText('ABCD').emHeightAscent, 40, "ctx.measureText('ABCD').emHeightAscent", "40"); 25 _assertSame(ctx.measureText('ABCD').emHeightDescent, 0, "ctx.measureText('ABCD').emHeightDescent", "0"); 26 _assertSame(ctx.measureText('ABCD').emHeightDescent + ctx.measureText('ABCD').emHeightAscent, 40, "ctx.measureText('ABCD').emHeightDescent + ctx.measureText('ABCD').emHeightAscent", "40"); 27 }, "Testing emHeights with zero descent metric"); 28 done();