ladybird/Libraries/LibJS/Tests/labels.js

test("labeled plain scope", () => {
  test: {
    let o = 1;
    expect(o).toBe(1);
    break test;
    expect().fail();
  }
});

test("break on plain scope from inner scope", () => {
  outer: {
    {
      break outer;
    }
    expect().fail();
  }
});

test("labeled for loop with break", () => {
  let counter = 0;
  outer: for (a of [1, 2, 3]) {
    for (b of [4, 5, 6]) {
      if (a === 2 && b === 5) break outer;
      counter++;
    }
  }
  expect(counter).toBe(4);
});

test("labeled for loop with continue", () => {
  let counter = 0;
  outer: for (a of [1, 2, 3]) {
    for (b of [4, 5, 6]) {
      if (b === 6) continue outer;
      counter++;
    }
  }
  expect(counter).toBe(6);
});