public function testListSizesWithId()
{
$this->addMockSubscriber($this->getTestFilePath('Flavor'));
$expectedId = 'compute1-15';
$sizes = $this->provider->listSizes($expectedId);
$this->assertCount(1, $sizes, 'listSizes returns an array with exactly one item');
$this->assertSame($expectedId, $sizes[0]->getId(), 'The NodeSize ID matches the ID that was requested');
}