public function testTwoWhereOr()
{
$firstExpression = $this->collection->expression()->where('field', 1);
$secondExpression = $this->collection->expression()->where('field', 2);
$thirdExpression = $this->collection->expression()->where('field2', 3);
$fourthExpression = $this->collection->expression()->where('field2', 4);
$expression = $this->collection->expression()->whereAnd($this->collection->expression()->whereOr($firstExpression, $secondExpression), $this->collection->expression()->whereOr($thirdExpression, $fourthExpression));
$this->assertEquals(array('$and' => array(array('$or' => array(array('field' => 1), array('field' => 2))), array('$or' => array(array('field2' => 3), array('field2' => 4))))), $expression->toArray());
}