function _union()
{
return Underscore::union();
}
/**
* @tags arrays
*/
public function testUnion()
{
// it should compute the union of the passed-in arrays
$values = [['a' => 1, 'b' => 2], ['c' => 2, 'd' => 3], ['e' => 3, 'f' => 4]];
$this->typeTolerant($values, [1, 2, 3, 4], function ($in, $out) {
$in = _::toArray($in);
$this->array(_::union($in[0], $in[1], $in[2]))->isEqualTo($out);
}, [1, -1]);
// it should be capable to compute unions of different type
$this->array(_::union($values[0], self::toObject($values[1]), self::toIterator($values[2])))->isEqualTo([1, 2, 3, 4]);
}