How to verify that a specific method was not called using Mockito?

To verify that a specific method was not called Using Mockito, we have multiple methods. In this blog, we will learn how to verify that a specific method was not called using Mockito in detail.

Table of Contents:

• Method 1: Using verify() function
  • Syntax:
• Method 2: Using never() function
  • Syntax:
• Conclusion
• FAQ

Method 1: Using verify() function

We can verify that a specific method was not called using Mockito by using verify() with times(0) verification mode. Let’s learn this with an example:

Syntax:

verify(mockObject, times(0)).methodName(arguments);

Where:

• mockObject is the object created using Mockito class,
• methodName is the name of the specific method

Code:

import org.mockito.Mockito;
import static org.mockito.Mockito.*;

class Example {
    void methodToCall() {
        System.out.println("methodToCall was called");
    }

    void methodNotToCall() {
        System.out.println("methodNotToCall was called");
    }
}

public class MockitoTest {
    public static void main(String[] args) {

        Example mockExample = mock(Example.class);
        mockExample.methodToCall();
        verify(mockExample, times(1)).methodToCall();
        verify(mockExample, times(0)).methodNotToCall();

    }
}

Explanation: Here, we have used times() function to check whether a function is called or not. times(0) means the function is not called, times(1) means it is called exactly once.

Method 2: Using never() function

We can use the never() function to verify that a specific method was not called using Mockito. This is the simplest method and is used for better readability of the code.

Syntax:

verify(mockObject, never()).methodNotToCall();

Code:

import org.mockito.Mockito;
import static org.mockito.Mockito.*;

class Example {
    void methodToCall() {
        System.out.println("methodToCall was called");
    }

    void methodNotToCall() {
        System.out.println("methodNotToCall was called");
    }
}

public class MockitoTest {
    public static void main(String[] args) {

        Example mockExample = mock(Example.class);
        mockExample.methodToCall();
        verify(mockExample, times(1)).methodToCall();
        verify(mockExample, never()).methodNotToCall();

    }
}

Explanation: Here never() function checks that a specific method was never called.

Conclusion

So far in this article, we have learned two different methods to verify that a specific method was not called using Mockito. Mockito is an open-source framework with an active community of developers. This means that users have access to continuous improvements, bug fixes, and support from the community. If you want to learn more about Java, you may refer to our Java course.

FAQs