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1 <!DOCTYPE html> | |
2 <script src="../../resources/js-test.js"></script> | |
3 <script> | |
4 description("Tests basic functionalities of offscreenCanvas.getContext on the ma in thread"); | |
5 | |
6 // Tests onstructor of OffscreenCanvas and length/width change | |
7 var aCanvas = new OffscreenCanvas(50, 50); | |
Justin Novosad
2016/03/07 15:30:26
Not new to this CL, but you should also test the e
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8 shouldBe("aCanvas.width", "50"); | |
9 shouldBe("aCanvas.height", "50"); | |
10 | |
11 aCanvas.width = 100; | |
12 aCanvas.height = 100; | |
13 shouldBe("aCanvas.width", "100"); | |
14 shouldBe("aCanvas.height", "100"); | |
15 | |
16 // Tests object type of getContext('2d') | |
17 var ctx; | |
18 shouldNotThrow("ctx = aCanvas.getContext('2d')"); | |
19 shouldBeType("ctx", "OffscreenCanvasRenderingContext2D"); | |
20 | |
21 // Calling getContext on a different context type will return null | |
22 var ctx2 = aCanvas.getContext("webgl"); | |
23 shouldBeNull("ctx2"); | |
Justin Novosad
2016/03/07 15:30:26
This is good, because this test will still be corr
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24 | |
25 // Calling getContext on the same context type will return the original context type | |
26 var ctx3 = aCanvas.getContext("2d"); | |
27 shouldBeNonNull("ctx3"); | |
28 shouldBeTrue("ctx3 == ctx"); | |
29 | |
30 // Calling getContext on an unimplemented context type will return null | |
31 var bCanvas = new OffscreenCanvas(20, 20); | |
32 var ctx4 = bCanvas.getContext("webgl"); | |
Justin Novosad
2016/03/07 15:30:26
This test will break the day we support WebGL, mig
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33 shouldBeNull("ctx4"); | |
34 </script> | |
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