bug920484.js (1286B)
1 load(libdir + "asserts.js"); 2 3 // Add an invalid "localeMatcher" option to Object.prototype, the exact value does not matter, 4 // any value except "best fit" or "lookup" is okay. 5 Object.prototype.localeMatcher = "invalid matcher option"; 6 7 // The Intl API may not be available in the testing environment. 8 if (this.hasOwnProperty("Intl")) { 9 // Intl constructors still work perfectly fine. The default options object doesn't inherit 10 // from Object.prototype and the invalid "localeMatcher" value from Object.prototype isn't 11 // consulted. 12 new Intl.Collator().compare("a", "b"); 13 new Intl.NumberFormat().format(10); 14 new Intl.DateTimeFormat().format(new Date); 15 16 // If an explicit "localeMatcher" option is given, the default from Object.prototype is ignored. 17 new Intl.Collator(void 0, {localeMatcher: "lookup"}).compare("a", "b"); 18 new Intl.NumberFormat(void 0, {localeMatcher: "lookup"}).format(10); 19 new Intl.DateTimeFormat(void 0, {localeMatcher: "lookup"}).format(new Date); 20 21 delete Object.prototype.localeMatcher; 22 23 // After removing the default option from Object.prototype, everything still works as expected. 24 new Intl.Collator().compare("a", "b"); 25 new Intl.NumberFormat().format(10); 26 new Intl.DateTimeFormat().format(new Date); 27 }