testCases := []struct {
		queue      *Queue
		region     string
		targetList *TargetList
		expectErr  bool
	}{
		{queue1, "eu-west-1", nil, true},
		{queue2, "us-east-1", targetList1, true},
		{queue3, "", targetList2, false},
		{queue2, "us-east-1", targetList2, false},
	}

	for i, testCase := range testCases {
		err := testCase.queue.Validate(testCase.region, testCase.targetList)
		expectErr := (err != nil)