public function testCollectionAddsExpressionParameterCorrectly()
{
$this->collection->addExpression($expression = O\Expression::value('val-test1'), ParameterHasher::valueType(), null, $instance = new \stdClass());
$this->assertEquals([new ExpressionParameter($expression, ParameterHasher::valueType(), null, $instance)], $this->collection->getParameters());
}