public function testAll()
{
// from js
$this->assertTrue(__u::all(array(), __u::identity()), 'the empty set');
$this->assertTrue(__u::all(array(true, true, true), __u::identity()), 'all true values');
$this->assertFalse(__u::all(array(true, false, true), __u::identity()), 'one false value');
$this->assertTrue(__u::all(array(0, 10, 28), function ($num) {
return $num % 2 === 0;
}), 'even numbers');
$this->assertFalse(__u::all(array(0, 11, 28), function ($num) {
return $num % 2 === 0;
}), 'odd numbers');
// extra
$this->assertTrue(__u::all(array()));
$this->assertFalse(__u::all(array(null)));
$this->assertFalse(__u::all(0));
$this->assertFalse(__u::all('0'));
$this->assertFalse(__u::all(array(0, 1)));
$this->assertTrue(__u::all(array(1)));
$this->assertTrue(__u::all(array('1')));
$this->assertTrue(__u::all(array(1, 2, 3, 4)));
$this->assertTrue(__u(array(1, 2, 3, 4))->all(), 'works with OO-style calls');
$this->assertTrue(__u(array(true, true, true))->all(__u::identity()));
$this->assertTrue(__u(array(true, true, true))->every(__u::identity()), 'aliased as "every"');
// docs
$this->assertFalse(__u::all(array(1, 2, 3, 4), function ($num) {
return $num % 2 === 0;
}));
$this->assertTrue(__u::all(array(1, 2, 3, 4), function ($num) {
return $num < 5;
}));
}