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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /html/canvas/offscreen/text/2d.text.measure.actualBoundingBox.whitespace.worker.html - WPT Dashboard Interop Dashboard
// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.
// OffscreenCanvas test in a worker:2d.text.measure.actualBoundingBox.whitespace
// Description:Testing actualBoundingBox with leading/trailing whitespace
// 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", "url('/fonts/CanvasTest.ttf')");
f.load();
self.fonts.add(f);
await self.fonts.ready;
ctx.font = '50px CanvasTest';
ctx.direction = 'ltr';
ctx.align = 'left'
ctx.baseline = 'alphabetic'
// Different platforms may render text slightly different.
// Values that are nominally expected to be zero might actually vary by a
// pixel or so if the UA accounts for antialiasing at glyph edges, so we
// allow a slight deviation.
var whitespaces = [0x9, 0xa, 0xc, 0xd, 0x20, 0x3000];
for (var codepoint of whitespaces) {
let whitespace = String.fromCharCode(codepoint);
_assert(Math.abs(ctx.measureText('A' + whitespace).actualBoundingBoxLeft) <= 1, "Math.abs(ctx.measureText('A' + whitespace).actualBoundingBoxLeft) <= 1");
_assert(ctx.measureText('A' + whitespace).actualBoundingBoxRight >= 50, "ctx.measureText('A' + whitespace).actualBoundingBoxRight >= 50");
_assert(Math.abs(ctx.measureText(whitespace + 'A').actualBoundingBoxLeft) >= 49, "Math.abs(ctx.measureText(whitespace + 'A').actualBoundingBoxLeft) >= 49");
_assert(ctx.measureText(whitespace + 'A').actualBoundingBoxRight <= 101, "ctx.measureText(whitespace + 'A').actualBoundingBoxRight <= 101");
}
}, "Testing actualBoundingBox with leading/trailing whitespace");
done();