Customer.class是什么意思
时间: 2024-05-31 13:10:53 浏览: 8
`Customer.class` 是Java编程语言中的一个类,它用于描述一个顾客对象的属性和行为,是一个模板或蓝图。在Java中,`.class` 文件是编译后的字节码文件,包含了Java类的定义和方法。它可以被Java虚拟机(JVM)加载和执行,从而创建类的实例并调用其方法。因此,`Customer.class` 表示一个已经编译好的Java类,可以用于创建顾客对象的实例。
相关问题
# -*- coding: UTF-8 -*- import unittest from unittest.mock import Mock class TestCustomer(unittest.TestCase): def test_login_true(self): from g6atm4.views.customer import Customer from g6atm4.models.dbutil import DbUtil customer = Customer() Customer.input_id = Mock() Customer.input_id.return_value = "111111" DbUtil.input_pin = Mock() DbUtil.input_pin.return_value = "222222" self.assertEqual(customer.login(), True, "账号密码匹配,登录ATM成功") def test_login_false(self): from g6atm4.views.customer import Customer from g6atm4.models.dbutil import DbUtil customer = Customer() Customer.input_id = Mock() Customer.input_id.return_value = "123456" DbUtil.input_pin = Mock() DbUtil.input_pin.return_value = "111111" self.assertEqual(customer.login(), False, "账号或密码错误,登录ATM失败") if __name__ == '__main__': unittest.main(argv=['first-arg-ignored'], exit=False)仿照这个,写一个存款测试代码
好的,这里是一个简单的 Python 代码示例,用于测试 ATM 存款的功能:
```python
import unittest
from unittest.mock import Mock
# 导入要测试的类
from atm import ATM
class TestATM(unittest.TestCase):
def test_deposit(self):
atm = ATM()
account_number = '1234567890'
initial_balance = 5000
deposit_amount = 1000
expected_balance = initial_balance + deposit_amount
# 模拟银行系统中的账户信息
atm.bank_system.accounts[account_number] = Mock()
atm.bank_system.accounts[account_number].balance = initial_balance
# 模拟用户输入存款金额
ATM.input_deposit_amount = Mock()
ATM.input_deposit_amount.return_value = deposit_amount
# 调用存款方法
atm.deposit(account_number)
# 验证存款后的账户余额是否正确
self.assertEqual(atm.bank_system.accounts[account_number].balance, expected_balance)
if __name__ == '__main__':
unittest.main()
```
这个代码示例使用 `unittest` 框架来测试 `ATM` 类中的 `deposit` 方法。在测试中,我们模拟了银行系统中的账户信息和用户输入的存款金额,然后调用 `deposit` 方法进行存款操作。最后,我们验证存款后的账户余额是否正确。你可以根据需要修改测试用例中的账户信息和存款金额。
SELECT * FROM ( SELECT ci.*, CASE WHEN ci.stop_status = 1 THEN 3 WHEN ci.stop_status = 2 AND ci.is_class_time = 0 THEN 2 WHEN ci.stop_status = 2 AND ci.is_class_time = 1 AND CONVERT(VARCHAR (10), ci.class_start_time, 20) <![CDATA[ <= ]]> CONVERT(VARCHAR (10), getdate(), 20) THEN 2 ELSE 1 END AS classStatus, COALESCE(classUser.userNum,0) AS userNum, COALESCE(classCourse.courseNum,0) AS courseNum FROM class_info ci LEFT JOIN ( SELECT cu.class_id, COUNT(1) AS userNum FROM class_user cu INNER JOIN customer c ON c.id = cu.user_id WHERE cu.is_valid = 1 AND c.is_valid = 1 AND cu.is_clearance = 0 GROUP BY cu.class_id ) AS classUser ON classUser.class_id = ci.id LEFT JOIN ( SELECT class_id, COUNT(1) AS courseNum FROM class_course GROUP BY class_id ) AS classCourse ON classCourse.class_id = ci.id
这是一个复杂的查询语句,它从class_info表中选择所有列,并通过左连接查询得到了classUser和classCourse的结果。我会将查询语句进行格式化,以便更好地理解它:
```sql
SELECT *
FROM (
SELECT ci.*,
CASE
WHEN ci.stop_status = 1 THEN 3
WHEN ci.stop_status = 2 AND ci.is_class_time = 0 THEN 2
WHEN ci.stop_status = 2 AND ci.is_class_time = 1 AND CONVERT(VARCHAR(10), ci.class_start_time, 20) <= CONVERT(VARCHAR(10), getdate(), 20) THEN 2
ELSE 1
END AS classStatus,
COALESCE(classUser.userNum, 0) AS userNum,
COALESCE(classCourse.courseNum, 0) AS courseNum
FROM class_info ci
LEFT JOIN (
SELECT cu.class_id, COUNT(1) AS userNum
FROM class_user cu
INNER JOIN customer c ON c.id = cu.user_id
WHERE cu.is_valid = 1
AND c.is_valid = 1
AND cu.is_clearance = 0
GROUP BY cu.class_id
) AS classUser ON classUser.class_id = ci.id
LEFT JOIN (
SELECT class_id, COUNT(1) AS courseNum
FROM class_course
GROUP BY class_id
) AS classCourse ON classCourse.class_id = ci.id
)
```
这个查询语句的目的是获取class_info表中的所有信息,并根据一些条件计算出classStatus、userNum和courseNum字段的值。classStatus字段根据stop_status和is_class_time的值进行计算,userNum字段是根据classUser子查询中的用户数量计算得出的,courseNum字段是根据classCourse子查询中的课程数量计算得出的。整个查询使用了多个子查询和左连接来获取所需的数据。
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