Mockito 3 Verify Interactions

Mockito keeps tracks of all the interaction that has been made with the mock object so that it can be verified. Mockito provides VerificationMode class that has a lot of methods for verifying the interaction with a mock object. Mockito also provides a Mockito#verifyNoMoreInteractions method that asserts that all the interactions with the mock object have been verified.

package com.example.mokito3.sujan;

public class AppleService {
    public String saveApple(String apple) {
        String appleString = "i love " + apple + " apple";
        return appleString;
    }

    public String getApple(String apple) {
        String appleString = "i eat " + apple + " apple";
        return appleString;
    }
}
package com.example.mokito3.sujan;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.junit.jupiter.MockitoExtension;

import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

@ExtendWith(MockitoExtension.class)
public class AppleServiceTest {
    @Mock
    private AppleService appleService;

    @Test
    void saveAppleWithMockTest() {
        when(appleService.saveApple("Macintosh")).thenReturn("i have apple");
        appleService.saveApple("Macintosh");
        appleService.getApple("Macintosh");
        verify(appleService).saveApple("Macintosh");
        verify(appleService).getApple("Macintosh");
        Mockito.verifyNoMoreInteractions(appleService);
    }
}
plugins {
    id 'java'
}
group 'org.example'
version '1.0-SNAPSHOT'

repositories { jcenter() }
dependencies {
    testImplementation('org.junit.jupiter:junit-jupiter:5.6.2')
    testCompile 'org.mockito:mockito-junit-jupiter:3.4.4'
}
test {
    useJUnitPlatform()
}

if Mockito#verifyNoMoreInteractions the method is called before verifying all the interactions, it will fail the test case.

package com.example.mokito3.sujan;

public class AppleService {
    public String saveApple(String apple) {
        String appleString = "i love " + apple + " apple";
        return appleString;
    }

    public String getApple(String apple) {
        String appleString = "i eat " + apple + " apple";
        return appleString;
    }
}
package com.example.mokito3.sujan;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.junit.jupiter.MockitoExtension;

import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

@ExtendWith(MockitoExtension.class)
public class AppleServiceTest {
    @Mock
    private AppleService appleService;

    @Test
    void saveAppleWithMockTest() {
        when(appleService.saveApple("Macintosh")).thenReturn("i have apple");
        appleService.saveApple("Macintosh");
        appleService.getApple("Macintosh");
        verify(appleService).saveApple("Macintosh");
        Mockito.verifyNoMoreInteractions(appleService);
        verify(appleService).getApple("Macintosh");
    }
}
plugins {
    id 'java'
}
group 'org.example'
version '1.0-SNAPSHOT'

repositories { jcenter() }
dependencies {
    testImplementation('org.junit.jupiter:junit-jupiter:5.6.2')
    testCompile 'org.mockito:mockito-junit-jupiter:3.4.4'
}
test {
    useJUnitPlatform()
}

Verify Zero Interactions

Mockito#verifyZeroInteractions is a legacy method, it provides exact same functionality of Mockito#verifyNoMoreInteractions.

Mockito#verifyZeroInteractions has been deprecated Since 3.0.1.

package com.example.mokito3.sujan;

public class AppleService {
    public String saveApple(String apple) {
        String appleString = "i love " + apple + " apple";
        return appleString;
    }

    public String getApple(String apple) {
        String appleString = "i eat " + apple + " apple";
        return appleString;
    }
}
package com.example.mokito3.sujan;

import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;

import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.verifyZeroInteractions;
import static org.mockito.Mockito.when;

@ExtendWith(MockitoExtension.class)
public class AppleServiceTest {
    @Mock
    private AppleService appleService;

    @Test
    void saveAppleWithMockTest() {
        when(appleService.saveApple("Macintosh")).thenReturn("i have apple");
        appleService.saveApple("Macintosh");
        appleService.getApple("Macintosh");
        verify(appleService).saveApple("Macintosh");
        verify(appleService).getApple("Macintosh");
        verifyZeroInteractions(appleService);
    }
}
plugins {
    id 'java'
}
group 'org.example'
version '1.0-SNAPSHOT'

repositories { jcenter() }
dependencies {
    testImplementation('org.junit.jupiter:junit-jupiter:5.6.2')
    testCompile 'org.mockito:mockito-junit-jupiter:3.4.4'
}
test {
    useJUnitPlatform()
}

 

follow us on

YouTube IconLinkedIn Icon