Side by Side Diff: chrome/content/tests/qunit.html
Issue 8433028:
added hook function to appIntegration to handle function-overwrites from other extensions (Closed)
Patch Set:
Created Sept. 25, 2012, 4:30 p.m.
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|---|---|
| (Empty) | |
| 1 <!DOCTYPE html> | |
| 2 <html> | |
| 3 <head> | |
| 4 <link rel="stylesheet" href="qunit.css"/> | |
| 5 <script src="qunit.js"></script> | |
| 6 <script type="text/javascript"> | |
| 7 (function() | |
| 8 { | |
| 9 var results = []; | |
| 10 var gBrowser = null; | |
| 11 | |
| 12 var URLFixer = new (function() | |
| 13 { | |
| 14 this.hook = function(obj, name, func) | |
| 15 { | |
| 16 var orig = obj[name]; | |
| 17 var origGet = obj.__lookupGetter__(name); | |
| 18 var origSet = obj.__lookupSetter__(name); | |
| 19 var dumbOverrideAttempt = false; | |
| 20 | |
| 21 var newFunc = function() | |
| 22 { | |
| 23 try | |
| 24 { | |
| 25 func.apply(this, arguments); | |
| 26 } | |
| 27 catch(e) | |
| 28 { | |
| 29 Cu.reportError(e); | |
| 30 } | |
| 31 orig.apply(this, arguments); | |
| 32 } | |
| 33 newFunc.toString = function() | |
| 34 { | |
| 35 dumbOverrideAttempt = true; | |
| 36 return orig.toString(); | |
| 37 } | |
| 38 | |
| 39 obj.__defineGetter__(name, function() | |
| 40 { | |
| 41 dumbOverrideAttempt = false; | |
| 42 return newFunc; | |
| 43 } | |
| 44 ); | |
| 45 | |
| 46 obj.__defineSetter__(name, function(value) | |
| 47 { | |
| 48 if (dumbOverrideAttempt) | |
| 49 { | |
| 50 orig = value; | |
| 51 } | |
| 52 else | |
| 53 { | |
| 54 delete obj[name]; | |
| 55 obj[name] = value; | |
| 56 } | |
| 57 } | |
| 58 ); | |
| 59 | |
| 60 return function() { | |
| 61 delete obj[name]; | |
| 62 obj[name] = orig; | |
| 63 if (origGet) { | |
| 64 obj.__defineGetter__(name, origGet); | |
| 65 } | |
| 66 if (origSet) { | |
| 67 obj.__defineSetter__(name, origSet); | |
| 68 } | |
| 69 } | |
| 70 } | |
| 71 } | |
| 72 )(); | |
| 73 | |
| 74 module("function-overwrites", | |
| 75 { | |
| 76 setup: function() | |
| 77 { | |
| 78 gBrowser = new (function() | |
| 79 { | |
| 80 this.foo = function(value) | |
| 81 { | |
| 82 results.push(value); | |
| 83 } | |
| 84 } | |
| 85 )(); | |
| 86 }, | |
| 87 teardown: function() | |
| 88 { | |
| 89 results = []; | |
| 90 gBrowser = null; | |
| 91 } | |
| 92 } | |
| 93 ); | |
| 94 | |
| 95 test("no overwrite", function() | |
| 96 { | |
| 97 var unhook = URLFixer.hook(gBrowser, "foo", function() | |
| 98 { | |
| 99 results.push(-1); | |
| 100 } | |
| 101 ); | |
| 102 | |
| 103 gBrowser.foo(0); | |
| 104 deepEqual(results, [-1, 0]); | |
| 105 | |
| 106 results = []; | |
| 107 unhook(); | |
| 108 gBrowser.foo(0); | |
| 109 deepEqual(results, [0]); | |
| 110 } | |
| 111 ); | |
| 112 | |
| 113 test("well implemented overwrite", function() | |
| 114 { | |
| 115 var unhook = URLFixer.hook(gBrowser, "foo", function() | |
| 116 { | |
| 117 results.push(-1); | |
| 118 } | |
| 119 ); | |
| 120 | |
| 121 var orig = gBrowser.foo; | |
| 122 gBrowser.foo = function() | |
| 123 { | |
| 124 results.push(1); | |
| 125 orig.apply(this, arguments); | |
| 126 } | |
| 127 | |
| 128 gBrowser.foo(0); | |
| 129 deepEqual(results, [1, -1, 0]); | |
| 130 | |
| 131 results = []; | |
| 132 gBrowser.foo = orig; | |
| 133 gBrowser.foo(0); | |
| 134 deepEqual(results, [-1, 0]); | |
| 135 | |
| 136 results = []; | |
| 137 unhook(); | |
| 138 gBrowser.foo(0); | |
| 139 deepEqual(results, [0]); | |
| 140 } | |
| 141 ); | |
| 142 | |
| 143 test("poorly implemented overwrite", function() | |
| 144 { | |
| 145 var unhook = URLFixer.hook(gBrowser, "foo", function() | |
| 146 { | |
| 147 results.push(-1); | |
| 148 } | |
| 149 ); | |
| 150 | |
| 151 var func = "results.push(1);"; | |
| 152 eval("gBrowser.foo = " + gBrowser.foo.toString().replace("{", "{" + func)); | |
| 153 | |
| 154 gBrowser.foo(0); | |
| 155 deepEqual(results, [-1, 1, 0]); | |
| 156 | |
| 157 results = []; | |
| 158 eval("gBrowser.foo = "+gBrowser.foo.toString().replace(func, "")); | |
| 159 gBrowser.foo(0); | |
| 160 deepEqual(results, [-1, 0]); | |
| 161 | |
| 162 results = []; | |
| 163 unhook(); | |
| 164 gBrowser.foo(0); | |
| 165 deepEqual(results, [0]); | |
| 166 } | |
| 167 ); | |
| 168 | |
| 169 test("best implemented overwrite", function() | |
| 170 { | |
| 171 var unhook = URLFixer.hook(gBrowser, "foo", function() | |
| 172 { | |
| 173 results.push(-1); | |
| 174 } | |
| 175 ); | |
| 176 | |
| 177 var unhook2 = URLFixer.hook(gBrowser, "foo", function() | |
| 178 { | |
| 179 results.push(1); | |
| 180 } | |
| 181 ); | |
| 182 gBrowser.foo(0); | |
| 183 deepEqual(results, [1, -1, 0]); | |
| 184 | |
| 185 results = []; | |
| 186 unhook2(); | |
| 187 gBrowser.foo(0); | |
| 188 deepEqual(results, [-1, 0]); | |
| 189 | |
| 190 results = []; | |
| 191 unhook(); | |
| 192 gBrowser.foo(0); | |
| 193 deepEqual(results, [0]); | |
| 194 } | |
| 195 ); | |
| 196 | |
| 197 } | |
| 198 )(); | |
| 199 </script> | |
| 200 </head> | |
| 201 <body> | |
| 202 <h1 id="qunit-header">URL Fixer unit tests</h1> | |
| 203 <h2 id="qunit-banner"></h2> | |
| 204 <div id="qunit-testrunner-toolbar"></div> | |
| 205 <h2 id="qunit-userAgent"></h2> | |
| 206 <ol id="qunit-tests"></ol> | |
| 207 </body> | |
| 208 </html> | |
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