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Diffstat (limited to 'js/src/tests/non262/RegExp/lastIndex-search.js')
-rw-r--r-- | js/src/tests/non262/RegExp/lastIndex-search.js | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/js/src/tests/non262/RegExp/lastIndex-search.js b/js/src/tests/non262/RegExp/lastIndex-search.js new file mode 100644 index 0000000000..5953b3a885 --- /dev/null +++ b/js/src/tests/non262/RegExp/lastIndex-search.js @@ -0,0 +1,118 @@ +// RegExp.prototype[Symbol.search]: Test lastIndex changes for ES2017. + +// RegExp-like class to test the RegExp method slow paths. +class DuckRegExp extends RegExp { + constructor(pattern, flags) { + return Object.create(DuckRegExp.prototype, { + regExp: { + value: new RegExp(pattern, flags) + }, + lastIndex: { + value: 0, writable: true, enumerable: false, configurable: false + } + }); + } + + exec(...args) { + this.regExp.lastIndex = this.lastIndex; + try { + return this.regExp.exec(...args); + } finally { + if (this.global || this.sticky) + this.lastIndex = this.regExp.lastIndex; + } + } + + get source() { return this.regExp.source; } + + get global() { return this.regExp.global; } + get ignoreCase() { return this.regExp.ignoreCase; } + get multiline() { return this.regExp.multiline; } + get sticky() { return this.regExp.sticky; } + get unicode() { return this.regExp.unicode; } +} + +// Test various combinations of: +// - Pattern matches or doesn't match +// - Global and/or sticky flag is set. +// - lastIndex exceeds the input string length +// - lastIndex is +-0 +const testCasesNotPositiveZero = [ + { regExp: /a/, lastIndex: -1, input: "a" }, + { regExp: /a/g, lastIndex: -1, input: "a" }, + { regExp: /a/y, lastIndex: -1, input: "a" }, + + { regExp: /a/, lastIndex: 100, input: "a" }, + { regExp: /a/g, lastIndex: 100, input: "a" }, + { regExp: /a/y, lastIndex: 100, input: "a" }, + + { regExp: /a/, lastIndex: -1, input: "b" }, + { regExp: /a/g, lastIndex: -1, input: "b" }, + { regExp: /a/y, lastIndex: -1, input: "b" }, + + { regExp: /a/, lastIndex: -0, input: "a" }, + { regExp: /a/g, lastIndex: -0, input: "a" }, + { regExp: /a/y, lastIndex: -0, input: "a" }, + + { regExp: /a/, lastIndex: -0, input: "b" }, + { regExp: /a/g, lastIndex: -0, input: "b" }, + { regExp: /a/y, lastIndex: -0, input: "b" }, +]; + +const testCasesPositiveZero = [ + { regExp: /a/, lastIndex: 0, input: "a" }, + { regExp: /a/g, lastIndex: 0, input: "a" }, + { regExp: /a/y, lastIndex: 0, input: "a" }, + + { regExp: /a/, lastIndex: 0, input: "b" }, + { regExp: /a/g, lastIndex: 0, input: "b" }, + { regExp: /a/y, lastIndex: 0, input: "b" }, +]; + +const testCases = [...testCasesNotPositiveZero, ...testCasesPositiveZero]; + +for (let Constructor of [RegExp, DuckRegExp]) { + // Basic test. + for (let {regExp, lastIndex, input} of testCases) { + let re = new Constructor(regExp); + re.lastIndex = lastIndex; + re[Symbol.search](input); + assertEq(re.lastIndex, lastIndex); + } + + // Test when lastIndex is non-writable and not positive zero. + for (let {regExp, lastIndex, input} of testCasesNotPositiveZero) { + let re = new Constructor(regExp); + Object.defineProperty(re, "lastIndex", { value: lastIndex, writable: false }); + assertThrowsInstanceOf(() => re[Symbol.search](input), TypeError); + assertEq(re.lastIndex, lastIndex); + } + + // Test when lastIndex is non-writable and positive zero. + for (let {regExp, lastIndex, input} of testCasesPositiveZero) { + let re = new Constructor(regExp); + Object.defineProperty(re, "lastIndex", { value: lastIndex, writable: false }); + if (re.global || re.sticky) { + assertThrowsInstanceOf(() => re[Symbol.search](input), TypeError); + } else { + re[Symbol.search](input); + } + assertEq(re.lastIndex, lastIndex); + } + + // Test lastIndex isn't converted to a number. + for (let {regExp, lastIndex, input} of testCases) { + let re = new RegExp(regExp); + let badIndex = { + valueOf() { + assertEq(false, true); + } + }; + re.lastIndex = badIndex; + re[Symbol.search](input); + assertEq(re.lastIndex, badIndex); + } +} + +if (typeof reportCompare === "function") + reportCompare(true, true); |