我正在试着写一个Mockito测试,不幸的是出了点问题。我的类如下:
我的测试类:
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.mockito.InjectMocks;
import org.mockito.Mock;
public class TestClass {
@Nested
public class testingPersonClass{
@InjectMocks
public Person personOne = new Person("zakzak", 37);
@Mock
public Hobbie hobbie = new Hobbie("Sport");
@Test
public void tesOne(){
System.out.println("personOne "+personOne.toString());
}
}
}
类Person
public class Person {
String name;
int age;
Hobbie hobbie;
Person(String name, int age){
this.age=age;
this.name=name;
}
//getters and setters
@Override
public String toString() {
return this.name+" "+this.age+" "+ this.hobbie.toString();
}
}
类Hobbie
public class Hobbie {
String hobbie;
public Hobbie( String hobbie ) {
this.hobbie = hobbie;
}
@Override
public String toString() {
return this.hobbie;
}
}
我得到了一个
java.lang.NullPointerException
因为还没有在personOne
对象中注入hobbie
对象。
我该如何解决这个问题呢?
我的Pom依赖项:
<dependencies>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>2.23.4</version>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter-engine</artifactId>
<version>5.1.0</version>
<scope>test</scope>
</dependency>
</dependencies>
发布于 2019-06-26 07:13:11
您应该在单元测试中使用以下选项之一初始化Mockito模拟:
选项1:在@BeforeEach
( JUnit 4中的@Before
)方法中
package stackoverflow;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
public class TestClass {
@Nested
public class testingPersonClass {
@InjectMocks
public Person personOne = new Person("zakzak", 37);
@Mock
public Hobbie hobbie = new Hobbie("Sport");
@BeforeEach
public void init() {
MockitoAnnotations.initMocks(this);
}
@Test
public void testOne() {
System.out.println("personOne " + personOne.toString());
}
}
}
选项2:用@ExtendWith(MockitoExtension.class)
注释您的测试类( JUnit 4中的@RunWith(MockitoJUnitRunner.class)
)
对于此方法,您必须向pom.xml
添加以下依赖项
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-junit-jupiter</artifactId>
<version>2.23.0</version>
<scope>test</scope>
</dependency>
注意,我已经注释掉了init
方法。
package stackoverflow;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;
@ExtendWith(MockitoExtension.class)
public class TestClass {
@Nested
public class testingPersonClass {
@InjectMocks
public Person personOne = new Person("zakzak", 37);
@Mock
public Hobbie hobbie = new Hobbie("Sport");
/*
@BeforeEach
public void init() {
MockitoAnnotations.initMocks(this);
}
*/
@Test
public void testOne() {
System.out.println("personOne " + personOne.toString());
}
}
}
有用的链接
你会发现这些文章很有帮助:
发布于 2019-06-28 00:26:11
试试这个,它对我很有效。
您必须将hobbie设置为personOne才能链接它们,在您的情况下,hobbie和personOne未链接
@RunWith(MockitoJUnitRunner.class)
public class TestClass {
@InjectMocks
public Person personOne = new Person("zakzak", 37);
@Autowired
public Hobbie hobbie = new Hobbie("Sport");
@Test
public void tesOne(){
personOne.setHobbie(hobbie);
System.out.println(personOne.toString());
Assert.assertEquals("zakzak 37 Sport",personOne.toString() );
}
}
https://stackoverflow.com/questions/56762794
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