2d.composite.globalAlpha.invalid.worker.js (947B)
1 // DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py. 2 // OffscreenCanvas test in a worker:2d.composite.globalAlpha.invalid 3 // Description: 4 // Note: 5 6 importScripts("/resources/testharness.js"); 7 importScripts("/html/canvas/resources/canvas-tests.js"); 8 9 var t = async_test(""); 10 var t_pass = t.done.bind(t); 11 var t_fail = t.step_func(function(reason) { 12 throw reason; 13 }); 14 t.step(function() { 15 16 var canvas = new OffscreenCanvas(100, 50); 17 var ctx = canvas.getContext('2d'); 18 19 ctx.globalAlpha = 0.5; 20 // This may not set it to exactly 0.5 if it is rounded/quantised, so 21 // remember for future comparisons. 22 var a = ctx.globalAlpha; 23 ctx.globalAlpha = Infinity; 24 _assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a"); 25 ctx.globalAlpha = -Infinity; 26 _assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a"); 27 ctx.globalAlpha = NaN; 28 _assertSame(ctx.globalAlpha, a, "ctx.globalAlpha", "a"); 29 t.done(); 30 }); 31 done();