// 33: array - `Array.prototype.findIndex`
// To do: make all tests pass, leave the assert lines unchanged!
// Follow the hints of the failure messages!

describe('`Array.prototype.findIndex` makes finding items in arrays easier', () => {
  it('takes a compare function, returns the index where it returned true', function() {
    function checkTrue (_) {
      return _ === true
    }
    const foundAt = [false, true].findIndex(checkTrue);
    assert.equal(foundAt, 1);
  });
  it('returns the first position it was found at', function() {
    const foundAt = [0, 1, 1, 1].findIndex(item => item == 1);
    assert.equal(foundAt, 1);
  });
  it('returns `-1` when nothing was found', function() {
    const foundAt = [1, 1, 1].findIndex(item => item > 1);
    assert.equal(foundAt, -1);
  });
  it('the findIndex callback gets the item, index and array as arguments', function() {
    const myArray = [1, 1, 2, 3, 4, 3]
    const foundAt = myArray.findIndex( _ => _ === 4 );
    assert.equal(foundAt, 4);
  });
  it('combined with destructuring complex compares become short', function() {
    const bob = {name: 'Bob'};
    const alice = {name: 'Alice'};
    const foundAt = [bob, alice].findIndex(({name:{length}}) => length > 3);
    assert.equal(foundAt, 1);
  });
});