我想用mockito为我的addTask方法编写单元测试。这是包含此方法的类。
package controller;
import model.Task;
import model.User;
import repository.TaskActions;
import repository.UserActions;
import java.sql.SQLException;
import java.util.List;
public class ToDoEngine {
private TaskActions taskActions;
private UserActions userActions;
private User connectedUser;
public ToDoEngine(UserActions userStorage, TaskActions taskStorage) {
this.taskActions = taskStorage;
this.userActions = userStorage;
}
public boolean signIn(String username, String password) throws SQLException {
connectedUser = new User(username, password);
if (!userActions.signIn(connectedUser)) {
return false;
}
connectedUser.setID(retrieveConnectedUserID(connectedUser));
return true;
}
private int retrieveConnectedUserID(User connectedUser) throws SQLException {
return userActions.retrieveUserID(connectedUser);
}
public void addTask(String taskName) throws SQLException {
taskActions.addTask(new Task(taskName), connectedUser);
}
}
这是我的尝试。不幸的是,我有错误。下面,我将向您展示stacktrace:
package controller;
import model.Task;
import model.User;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import repository.TaskActions;
import repository.UserActions;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;
import static org.junit.Assert.assertEquals;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
public class ToDoEngineTest {
@Mock
TaskActions taskActionsMock;
@Mock
UserActions userActionsMock;
private ToDoEngine toDoEngine;
@Before
public void setup() {
MockitoAnnotations.initMocks(this);
toDoEngine = new ToDoEngine(userActionsMock, taskActionsMock);
}
@Test
public void addTask() throws SQLException {
Task taskName = new Task("wash");
User user = new User("admin","123");
toDoEngine.addTask("wash");
verify(taskActionsMock).addTask(taskName,user);
}
}
堆栈跟踪:
Argument(s) are different! Wanted:
taskActionsMock.addTask(
Task(taskName=wash),
model.User@1b71f500
);
-> at controller.ToDoEngineTest.addTask(ToDoEngineTest.java:68)
Actual invocation has different arguments:
taskActionsMock.addTask(
Task(taskName=wash),
null
);
-> at controller.ToDoEngine.addTask(ToDoEngine.java:40)
Comparison Failure: <Click to see difference>
Argument(s) are different! Wanted:
taskActionsMock.addTask(
Task(taskName=wash),
model.User@1b71f500
);
-> at controller.ToDoEngineTest.addTask(ToDoEngineTest.java:68)
Actual invocation has different arguments:
taskActionsMock.addTask(
Task(taskName=wash),
null
);
-> at controller.ToDoEngine.addTask(ToDoEngine.java:40)
at controller.ToDoEngineTest.addTask(ToDoEngineTest.java:68)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
...
User和Task类包含hashCode和Equals方法。
任务
package model;
import lombok.*;
@Getter
@Setter
@AllArgsConstructor
@ToString
@NoArgsConstructor
@EqualsAndHashCode
public class Task {
private String taskName;
}
用户:
package model;
import lombok.*;
@RequiredArgsConstructor
@Getter
@Setter
@EqualsAndHashCode
public class User {
private final String name;
private final String password;
private int ID;
}
在此先感谢您的帮助。 :d
在您的测试用例中,您尝试验证对此方法的调用:
public void addTask(String taskName) throws SQLException {
taskActions.addTask(new Task(taskName), connectedUser);
}
有了这个:
User user = new User("admin","123");
...
verify(taskActionsMock).addTask(taskName,user);
失败的消息......
Actual invocation has different arguments:
taskActionsMock.addTask(
Task(taskName=wash),
null
);
...告诉我们测试中connectedUser
的值是null
。
查看你的代码connectedUser
的ToDoEngine
成员是通过调用signIn()
方法来填充的,但是你的测试用例没有调用那个方法,因此当你的测试调用connectedUser
时addTask
为null。
因此,如果您不需要/想要测试是否向addTask
提供了正确的用户,那么只需将您的验证调用更改为:verify(taskActionsMock).addTask(taskName,null)
但是,这感觉就像一个回避,所以你应该确保connectedUser
不为null,并且是你在测试用例中提供给验证调用的值。
你的verify
方法指定你期望用特定的addTask
和taskName
对象调用user
。
verify(taskActionsMock).addTask(taskName,user);
但由于你的连接用户是null
,这种期望失败了。如果您不关心已连接的用户,您可以使用匹配器告诉Mockito忽略其实际值。例如。
verify(taskActionsMock).addTask(ArgumentMatchers.eq(taskName), ArgumentMatchers.any());
或者,如果您确实关心用户,只需将ToDoEngine设置为已连接的用户即可。