- (void)testStatement_Regular {
    Movie *matrixMovie1 = [[Movie alloc] initWithTitle:@"黑客帝国1"
                                             priceCode:MovieEnumRegular];
    Demand *aDemand1 = [[Demand alloc] initWithMovie:matrixMovie1
                                          timePeriod:TimePeriodEnumWorkDaytime];

// 顾客租赁一部：
Customer *aCustomer = [[Customer alloc] initCustomerWithName:@"溪石"];
[aCustomer addDemand:aDemand1];

XCTAssertTrue([@"溪石的点播清单\\\\n"
@"\\\\t黑客帝国1\\\\t2 元\\\\n"
@"费用总计 2 元\\\\n"
@"获得积分 1"
isEqualToString:[aCustomer statement]],
@"测试点播一部普通电影");

}