ladybird/Libraries/LibJS/Tests/builtins/Array/array-spread.js

load("test-common.js");

function testArray(arr) {
  return arr.length === 4 && arr[0] === 0 && arr[1] === 1 && arr[2] === 2 && arr[3] === 3;
}

try {
  let arr = [0, ...[1, 2], 3];
  assert(testArray(arr));

  let a = [1, 2];
  arr = [0, ...a, 3];
  assert(testArray(arr));

  let obj = { a: [1, 2] };
  arr = [0, ...obj.a, 3];
  assert(testArray(arr));

  arr = [...[], ...[...[0, 1, 2]], 3];
  assert(testArray(arr));

  assertThrowsError(
    () => {
      [...1];
    },
    {
      error: TypeError,
      message: "1 is not iterable",
    }
  );

  assertThrowsError(
    () => {
      [...{}];
    },
    {
      error: TypeError,
      message: "[object Object] is not iterable",
    }
  );

  console.log("PASS");
} catch (e) {
  console.log("FAIL: " + e);
}