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1 <html> |
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2 <head> |
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3 <script type="text/javascript"> |
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4 function assert(cond, msg) { if (!cond) { throw msg; } } |
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5 window.onload = function() { |
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6 try { |
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7 var ctx = document.getElementById("c1").getContext("2d"); |
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8 |
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9 assert(null === ctx.mozDash, |
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10 "Default dash is null (no dash)"); |
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11 assert(0 == ctx.mozDashOffset, |
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12 "Default dashOffset is 0 (no dash)"); |
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13 |
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14 ctx.mozDash = [ 2 ]; |
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15 assert(1 == ctx.mozDash.length && 2 == ctx.mozDash[0], |
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16 "dash = [ 2 ] works"); |
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17 ctx.mozDash = null; |
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18 assert(null === ctx.mozDash, |
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19 "dash = null resets to null"); |
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20 ctx.mozDash = [ 2 ]; |
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21 ctx.mozDash = undefined; |
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22 assert(null === ctx.mozDash, |
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23 "dash = undefined resets to null"); |
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24 ctx.mozDash = [ 2 ]; |
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25 ctx.mozDash = [ ]; |
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26 assert(null === ctx.mozDash, |
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27 "dash = [] resets to null"); |
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28 |
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29 ctx.mozDash = [ 2 ]; |
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30 assert(0 == ctx.mozDashOffset, "dashOffset is 0"); |
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31 ctx.mozDashOffset = 1; |
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32 assert(1 == ctx.mozDashOffset, "Setting dashOffset succeeded"); |
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33 ctx.mozDash = null; |
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34 assert(0 == ctx.mozDashOffset, "Disabling dash resets dashOffset"); |
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35 ctx.mozDash = [ 2 ]; |
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36 assert(0 == ctx.mozDashOffset, "Previous dashOffset isn't remembered"); |
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37 ctx.mozDash = null; |
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38 |
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39 // NB: might want to add a |.dash = number| special case, |
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40 // don't test that it fails here. Might also want to add a |
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41 // |.dash = [0]| special case for resetting, so don't test |
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42 // that either. |
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43 var badVals = [ -1, |
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44 "string", |
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45 /* According to the WebIDL sequence-ifying |
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46 * (really they mean array-ifying here) |
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47 * algorithm, objects without .length |
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48 * properties convert to a 0-length arrays. |
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49 * This seems ... odd, since by the book we're |
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50 * forced to accept |ctx.dash = Function|, |
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51 * e.g., but there it is. |
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52 */ |
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53 // { obj: true }, |
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54 [ "array of string" ], |
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55 [ -1 ], |
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56 [ 0, 0, 0 ], |
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57 [ 2, "string" ], |
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58 ]; |
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59 ctx.mozDash = [ 2 ]; |
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60 for (var i = 0; i < badVals.length; ++i) { |
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61 var error = false; |
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62 try { ctx.mozDash = badVals[i]; } |
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63 catch(e) { error = true; } |
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64 assert(error && 1 == ctx.mozDash.length && 2 == ctx.mozDash[0], |
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65 "Expected |dash = "+ badVals[i] +"| to throw exception and not change .dash"); |
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66 } |
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67 ctx.mozDash = null; |
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68 |
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69 ctx.save(); |
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70 ctx.mozDash = [ 2 ]; |
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71 ctx.restore(); |
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72 assert(null === ctx.mozDash, |
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73 "dash was saved then restored"); |
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74 } catch (e) { |
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75 document.body.innerHTML = "FAIL: "+ e.toString(); |
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76 return; |
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77 } |
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78 document.body.innerHTML = "Pass"; |
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79 } |
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80 </script> |
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81 </head> |
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82 <body> |
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83 <div><canvas id="c1" width="300" height="300"></canvas></div> |
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84 </body> |
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85 </html> |