public function testFieldsTrait()
{
$idField = new Field(['name' => 'id', 'type' => new IntType()]);
$nameField = new Field(['name' => 'name', 'type' => new StringType()]);
$objectType = new ObjectType(['name' => 'Post', 'fields' => [$idField], 'description' => 'Post type description']);
$this->assertTrue($objectType->hasFields());
$this->assertEquals(['id' => $idField], $objectType->getFields());
$objectType->addField($nameField);
$this->assertEquals(['id' => $idField, 'name' => $nameField], $objectType->getFields());
}
