public function test_it_adds_operation()
{
$this->assertAttributeSame([], 'operations', $this->SUT);
$operation1 = new FakeOperation('');
$this->SUT->addOperation($operation1);
$this->assertAttributeSame([$operation1], 'operations', $this->SUT);
$operation2 = new FakeOperation('');
$this->SUT->addOperation($operation2);
$this->assertAttributeSame([$operation1, $operation2], 'operations', $this->SUT);
}