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1 <!DOCTYPE html> |
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2 <html> |
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3 <head> |
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4 <script type="text/javascript"> |
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5 function stringify(a) { |
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6 if (a) |
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7 return a.toSource(); |
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8 return ''+a; |
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9 } |
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10 var args = [undefined, null, [], {}, 0, "0"]; |
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11 var stringArgs = args.map(stringify); |
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12 |
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13 function test_method(context, method, arity) { |
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14 function testParams(existingParams, depth) { |
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15 for (var arg of stringArgs) { |
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16 var code = "context[method](" + existingParams + arg + ")"; |
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17 try { |
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18 eval(code); |
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19 } catch (ex) { |
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20 // Exceptions are expected |
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21 } |
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22 |
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23 if (depth < arity) |
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24 testParams(existingParams + arg + ",", depth + 1); |
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25 } |
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26 } |
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27 testParams("", 1); |
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28 } |
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29 |
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30 function startTest() { |
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31 var canvas = document.getElementById("img"); |
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32 var context = canvas.getContext('2d');; |
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33 test_method(context, "getImageData", 4); |
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34 test_method(context, "putImageData", 3); |
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35 } |
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36 </script> |
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37 </head> |
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38 <body onload="startTest()"> |
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39 <canvas id="img">No canvas support.</canvas> |
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40 </body> |
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41 </html> |