When multiple methods of single instance are invoked in an order in a class. We can verify the order of those method invocations using Mockito’s InOrder functionality. Consider the below code

Class2

package package4;

public class Class2 {
    public void method1() {
        System.out.println("Class2 method1");
    }
    
    public void method2() {
        System.out.println("Class2 method2");
    }
    
    public void method3() {
        System.out.println("Class2 method3");
    }
}

Class1

package package4;

public class Class1 {
    private Class2 class2;
    
    public void method1() {
        class2.method1();
        class2.method2();
        class2.method3();
    }
}

In the above code Class1’s method1, we are calling all the three methods of Class2. We can verify this order by creating an instance of InOrder class using Mockito’s static method inOrder as shown below
InOrder inOrder = Mockito.inOrder(class2);

Now we can verify the order using Mockito’s verify method as shown below
inOrder.verify(class2).method1();
inOrder.verify(class2).method2();
inOrder.verify(class2).method3();

Below is the complete code for your reference

Class1Test

package package4;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InOrder;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.runners.MockitoJUnitRunner;

@RunWith(MockitoJUnitRunner.class)
public class Class1Test {
    @InjectMocks
    private Class1 class1;
    
    @Mock
    private Class2 class2;
    
    @Test
    public void testMethod1() {
        class1.method1();
        InOrder inOrder = Mockito.inOrder(class2);
        inOrder.verify(class2).method1();
        inOrder.verify(class2).method2();
        inOrder.verify(class2).method3();
    }
}