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1 <!DOCTYPE html> | |
2 <script src="../../resources/js-test.js"></script> | |
3 <script> | |
4 description("Tests that the OffScreenCanvas can handle invalid arguments"); | |
5 | |
6 // Since blink uses signed int internally, this case tests how the constructor | |
7 // responds to the arguments that are larger than INT_MAX which would cause | |
8 // overflow. The current implementation is expected to clamp. | |
9 var setWidth = Math.pow(2, 31); | |
10 var setHeight = Math.pow(2, 31); | |
11 var obj = {Name: "John Doe", Age: 30}; | |
12 | |
13 var canvas1 = new OffScreenCanvas(setWidth, setHeight); | |
14 shouldBe("canvas1.width", "setWidth-1"); | |
15 shouldBe("canvas1.height", "setHeight-1"); | |
16 | |
17 canvas1.width = null; | |
18 canvas1.height = null; | |
19 shouldBe("canvas1.width", "0"); | |
20 shouldBe("canvas1.height", "0"); | |
21 | |
22 var didThrow = false; | |
23 try { | |
24 var canvas2 = new OffScreenCanvas(-1, -1); | |
25 } catch(e) { | |
26 didThrow = true; | |
27 testPassed("OffScreenCanvas(-1, -1) throws an exception as expected: " + e); | |
28 } | |
29 if (!didThrow) | |
30 testFailed("OffScreenCanvas(-1, -1) should throw an exception but did not.") ; | |
31 | |
32 var canvas3 = new OffScreenCanvas(null, null); | |
33 shouldBe("canvas3.width", "0"); | |
34 shouldBe("canvas3.height", "0"); | |
35 | |
36 canvas3.width = setWidth; | |
37 canvas3.height = setHeight; | |
38 shouldBe("canvas3.width", "setWidth-1"); | |
39 shouldBe("canvas3.height", "setHeight-1"); | |
40 | |
41 try { | |
42 canvas3.width = -1; | |
Justin Novosad
2015/12/04 04:37:41
Use the helper function "shouldThrow" instead of a
| |
43 } catch(e) { | |
44 didThrow = true; | |
45 testPassed("Setting width to -1 throws an exception as expected: " + e); | |
46 } | |
47 if (!didThrow) | |
48 testFailed("Setting width to -1 should throw an exception but did not."); | |
49 | |
50 try { | |
51 canvas3.width = obj; | |
52 } catch(e) { | |
53 didThrow = true; | |
54 testPassed("Setting width to an object throws an exception as expected: " + e); | |
55 } | |
56 if (!didThrow) | |
57 testFailed("Setting width to an object should throw an exception but did not ."); | |
58 | |
59 try { | |
60 var canvas4 = new OffScreenCanvas(obj, obj); | |
61 } catch(e) { | |
62 didThrow = true; | |
63 testPassed("OffScreenCanvas(object, object) throws an exception as expected: " + e); | |
64 } | |
65 if (!didThrow) | |
66 testFailed("OffScreenCanvas(object, object) should throw an exception but di d not"); | |
67 | |
68 </script> | |
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