indices-array-element.js

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// Copyright 2019 Ron Buckton. All rights reserved.

// This code is governed by the BSD license found in the LICENSE file.

/*---

description: A matching element of indices is an Array with exactly two number properties.

esid: sec-getmatchindicesarray

features: [regexp-match-indices]

info: |

  GetMatchIndicesArray ( S, match )

    5. Return CreateArrayFromList(« _match_.[[StartIndex]], _match_.[[EndIndex]] »).

---*/

let input = "abcd";

let match = /b(c)/d.exec(input);

let indices = match.indices;

// `indices[0]` is an array

assert.sameValue(Object.getPrototypeOf(indices[0]), Array.prototype);

assert.sameValue(indices[0].length, 2);

assert.sameValue(typeof indices[0][0], "number");

assert.sameValue(typeof indices[0][1], "number");

// `indices[1]` is an array

assert.sameValue(Object.getPrototypeOf(indices[1]), Array.prototype);

assert.sameValue(indices[1].length, 2);

assert.sameValue(typeof indices[1][0], "number");

assert.sameValue(typeof indices[1][1], "number");

reportCompare(0, 0);