Mockito 3 Verify

We have created a mock object using Mock, its working fine, but we need to make sure that Mock method is actually called. for this, Mockito provides the Verify method.

package com.example.mokito3.sujan;

public class AppleService {

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

import org.junit.jupiter.api.Test;

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

public class AppleServiceTest {
    @Test
    void saveAppleWithMockTest() {
        AppleService appleService = mock(AppleService.class);
        appleService.saveApple("Macintosh");
        verify(appleService).saveApple("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()
}

Mocktio verify method has lot of overloaded constructor. Mockito provides VerificationMode interface which is used to calculate the number of times stub methods has been invoked. VerificaitonMode is also an input parameter in verify method, if we dont provide any then VerificationMode.times(1) will be default.

verify(appleService).saveApple("Macintosh") is equal to verify(appleService, times(1)).saveApple("Macintosh")

package com.example.mokito3.sujan;

public class AppleService {
    public String saveApple(String apple) {
        String appleString = "i love " + 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.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;

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

    @Test
    void saveAppleWithStaticMockTest() {
        AppleService appleService = mock(AppleService.class);
        appleService.saveApple("Macintosh");
        verify(appleService).saveApple("Macintosh");
        verify(appleService, times(1)).saveApple("Macintosh");
    }

    @Test
    void saveAppleWithAnnotationMockTest() {
        appleService.saveApple("Macintosh");
        verify(appleService).saveApple("Macintosh");
        verify(appleService, times(1)).saveApple("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()
}

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