atom-match-unicode-split-surrogate.js

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function test(flags) {

  // RegExp with a simple atom matcher.

  // - Global flag to enable setting 'lastIndex'.

  let s = "\u{10000}";

  let re = RegExp(s, flags + "g");

  for (let i = 0; i < 200; ++i) {

    // Set lastIndex in the middle of the surrogate pair.

    re.lastIndex = 1;

    // |exec| will reset lastIndex to the start of the surrogate pair.

    let r = re.exec(s);

    // Atom match should succeed.

    assertEq(r[0], s);

    assertEq(r.index, 0);

    assertEq(re.lastIndex, 2);

// Unicode flag to enable surrogate pairs support.

test("u");

// Unicode-Sets flag to enable surrogate pairs support.

test("v");