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Issue 2468263002: Handle exception when user call canvas.transferControlToOffscreen() twice (Closed)
Patch Set: fix Created 4 years, 1 month ago
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1 <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN"> 1 <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
2 <html> 2 <html>
3 <head> 3 <head>
4 <script src="../../resources/testharness.js"></script> 4 <script src="../../resources/testharness.js"></script>
5 <script src="../../resources/testharnessreport.js"></script> 5 <script src="../../resources/testharnessreport.js"></script>
6 </head> 6 </head>
7 <body> 7 <body>
8 <script> 8 <script>
9 function createCanvas(width, height) { 9 function createCanvas(width, height) {
10 var canvas = document.createElement("canvas"); 10 var canvas = document.createElement("canvas");
(...skipping 10 matching lines...) Expand all
21 try { 21 try {
22 offscreenCanvas1 = canvas1.transferControlToOffscreen(); 22 offscreenCanvas1 = canvas1.transferControlToOffscreen();
23 assert_equals(offscreenCanvas1.width, width); 23 assert_equals(offscreenCanvas1.width, width);
24 assert_equals(offscreenCanvas1.height, height); 24 assert_equals(offscreenCanvas1.height, height);
25 } catch (ex) { 25 } catch (ex) {
26 assert_false(ex.message); 26 assert_false(ex.message);
27 } 27 }
28 }, "Tests whether transferControlToOffscreen can be run correctly."); 28 }, "Tests whether transferControlToOffscreen can be run correctly.");
29 29
30 test(function() { 30 test(function() {
31 var canvas2 = createCanvas(50, 50); 31 var canvas2a = createCanvas(50, 50);
32 var offscreenCanvas2; 32 var offscreenCanvas2a;
33 var ctx = canvas2.getContext("2d"); 33 var ctx = canvas2a.getContext("2d");
34 assert_throws("InvalidStateError", function() { 34 assert_throws("InvalidStateError", function() {
35 offscreenCanvas2 = canvas2.transferControlToOffscreen(); 35 offscreenCanvas2a = canvas2a.transferControlToOffscreen();
36 assert_false("transferControlToOffscreen from a canvas with context didn 't throw an exception."); 36 assert_false("transferControlToOffscreen from a canvas with context didn 't throw an exception.");
37 }, "transferControlToOffscreen from a canvas with context throws an exceptio n"); 37 }, "transferControlToOffscreen from a canvas with context throws an exceptio n");
38
39 var canvas2b = createCanvas(10, 10);
40 var offscreenCanvas2b = canvas2b.transferControlToOffscreen();
41 assert_throws("InvalidStateError", function() {
42 var anotherOffscreenCanvas = canvas2b.transferControlToOffscreen();
43 }, "canvas.transferControlToOffscreen() is not allowed to called more than o nce for the same canvas.");
38 }, "Tests whether transferControlToOffscreen throws exception correctly."); 44 }, "Tests whether transferControlToOffscreen throws exception correctly.");
39 45
40 test(function() { 46 test(function() {
41 var canvas3 = createCanvas(10, 10); 47 var canvas3 = createCanvas(10, 10);
42 var offscreenCanvas3 = canvas3.transferControlToOffscreen(); 48 var offscreenCanvas3 = canvas3.transferControlToOffscreen();
43 assert_equals(offscreenCanvas3.width, 10); 49 assert_equals(offscreenCanvas3.width, 10);
44 assert_equals(offscreenCanvas3.height, 10); 50 assert_equals(offscreenCanvas3.height, 10);
45 assert_throws("InvalidStateError", function() { offscreenCanvas3.width = 20; }); 51 assert_throws("InvalidStateError", function() { offscreenCanvas3.width = 20; });
46 assert_throws("InvalidStateError", function() { offscreenCanvas3.height = 20 ; }); 52 assert_throws("InvalidStateError", function() { offscreenCanvas3.height = 20 ; });
47 }, "Test if resizing on offscreencanvas transferred from html canvas has thrown exceptions."); 53 }, "Test if resizing on offscreencanvas transferred from html canvas has thrown exceptions.");
(...skipping 14 matching lines...) Expand all
62 canvas4.toBlob(function() {}); 68 canvas4.toBlob(function() {});
63 }, "canvas.toBlob is not allowed after transferring control to offscreen."); 69 }, "canvas.toBlob is not allowed after transferring control to offscreen.");
64 assert_throws("InvalidStateError", function() { 70 assert_throws("InvalidStateError", function() {
65 canvas4.toDataURL(); 71 canvas4.toDataURL();
66 }, "canvas.toDataURL is not allowed after transferring control to offscreen. "); 72 }, "canvas.toDataURL is not allowed after transferring control to offscreen. ");
67 }, "Test if modifying canvas after it transfers controls to offscreen throw exce ptions"); 73 }, "Test if modifying canvas after it transfers controls to offscreen throw exce ptions");
68 74
69 </script> 75 </script>
70 </body> 76 </body>
71 </html> 77 </html>
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