Mocking Abstract classes

Posted in Mockito

In this post under Mockito, I will show with example how to create mock of an abstract class

For our example we will use below abstract class

Shape

package package4;
public abstract class Shape {
    public abstract int calculateArea();
    public void display() {
        System.out.println("Area is:" + calculateArea());
    }
}

Below is the test class where we create a mock of “Shape” class

Test class

package package4;
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.junit.jupiter.api.Assertions.assertNotNull;
@ExtendWith(MockitoExtension.class)
public class ShapeTest {
    @Mock
    private Shape shape;
    @Test
    public void testMethod1() {
        assertNotNull(shape);
    }
}

In the above code, at line 13, I declare a field named “shape” of type “Shape” class. We annotate it with “@Mock” annotation.

So creating a mock of an abstract class is similar to creating a mock of non-abstract class.

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Published by sumanthprabhakar

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