mirror of https://github.com/tc39/test262.git
59 lines
1.8 KiB
JavaScript
59 lines
1.8 KiB
JavaScript
// Copyright (C) 2017 Mathias Bynens. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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description: |
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Collection of functions used to assert the correctness of RegExp objects.
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defines: [buildString, testPropertyEscapes, matchValidator]
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---*/
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function buildString({ loneCodePoints, ranges }) {
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const CHUNK_SIZE = 10000;
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let result = Reflect.apply(String.fromCodePoint, null, loneCodePoints);
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for (let i = 0; i < ranges.length; i++) {
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const range = ranges[i];
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const start = range[0];
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const end = range[1];
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const codePoints = [];
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for (let length = 0, codePoint = start; codePoint <= end; codePoint++) {
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codePoints[length++] = codePoint;
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if (length === CHUNK_SIZE) {
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result += Reflect.apply(String.fromCodePoint, null, codePoints);
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codePoints.length = length = 0;
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}
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}
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result += Reflect.apply(String.fromCodePoint, null, codePoints);
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}
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return result;
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}
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function testPropertyEscapes(regex, string, expression) {
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if (!regex.test(string)) {
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for (const symbol of string) {
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const hex = symbol
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.codePointAt(0)
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.toString(16)
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.toUpperCase()
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.padStart(6, "0");
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assert(
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regex.test(symbol),
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`\`${ expression }\` should match U+${ hex } (\`${ symbol }\`)`
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);
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}
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}
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}
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// Returns a function that will validate RegExp match result
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//
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// Example:
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//
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// var validate = matchValidator(['b'], 1, 'abc');
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// validate(/b/.exec('abc'));
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//
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function matchValidator(expectedEntries, expectedIndex, expectedInput) {
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return function(match) {
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assert.compareArray(match, expectedEntries, 'Match entries');
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assert.sameValue(match.index, expectedIndex, 'Match index');
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assert.sameValue(match.input, expectedInput, 'Match input');
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}
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}
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