regexp-1.js - mozsearch

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// Mutating certain properties pops the fuse. Changing the enumerable attribute is fine.

function testProp(propName) {

  newGlobal().evaluate(`

    assertEq(getFuseState().OptimizeRegExpPrototypeFuse.intact, true);

    Object.defineProperty(RegExp.prototype, ${propName}, {enumerable: true});

    assertEq(getFuseState().OptimizeRegExpPrototypeFuse.intact, true);

    Object.defineProperty(RegExp.prototype, ${propName}, {value:null});

    assertEq(getFuseState().OptimizeRegExpPrototypeFuse.intact, false);

`);

// Getters.

testProp(`"flags"`);

testProp(`"global"`);

testProp(`"hasIndices"`);

testProp(`"ignoreCase"`);

testProp(`"multiline"`);

testProp(`"sticky"`);

testProp(`"unicode"`);

testProp(`"unicodeSets"`);

testProp(`"dotAll"`);

// Data properties.

testProp(`"exec"`);

testProp(`Symbol.match`);

testProp(`Symbol.matchAll`);

testProp(`Symbol.replace`);

testProp(`Symbol.search`);

testProp(`Symbol.split`);