Other class is not mocked as required #747

public class CommonMocksExampleTest {

    @Test
    public void testNextValue() {
        CommonMocksExample commonMocksExample = new CommonMocksExample();
        RecursiveTypeClass node = new RecursiveTypeClass();
        RecursiveTypeClass recursiveTypeClass = new RecursiveTypeClass();
        recursiveTypeClass.next = null;
        recursiveTypeClass.value = 0;
        node.next = recursiveTypeClass;
        node.value = 0;

        RecursiveTypeClass actual = commonMocksExample.nextValue(node);

        RecursiveTypeClass nodeNext = node.next;
        RecursiveTypeClass actualNext = actual.next;
        RecursiveTypeClass actualNextNext = actualNext.next;
        assertNull(actualNextNext);

        int nodeNextValue = nodeNext.value;
        int actualNextValue = actualNext.value;
        assertEquals(nodeNextValue, actualNextValue);

        int nodeValue = node.value;
        int actualValue = actual.value;
        assertEquals(nodeValue, actualValue);
    }

    @Test
    public void testNextValueThrowsNPE() {
        CommonMocksExample commonMocksExample = new CommonMocksExample();
        RecursiveTypeClass node = new RecursiveTypeClass();
        
        /* This test fails because method [org.utbot.examples.mock.CommonMocksExample.nextValue] produces [java.lang.NullPointerException]
            org.utbot.examples.mock.CommonMocksExample.nextValue(CommonMocksExample.java:25) */
        commonMocksExample.nextValue(node);
    }

    @Test
    public void testNextValue_NodeNextEqualsNode() {
        CommonMocksExample commonMocksExample = new CommonMocksExample();
        RecursiveTypeClass nodeMock = mock(RecursiveTypeClass.class);
        nodeMock.next = nodeMock;

        RecursiveTypeClass actual = commonMocksExample.nextValue(nodeMock);

        int nodeMockValue = nodeMock.value;
        int actualValue = actual.value;
        assertEquals(nodeMockValue, actualValue);
    }

    @Test
    public void testNextValue_ThrowNullPointerException() {
        CommonMocksExample commonMocksExample = new CommonMocksExample();
        
        /* This test fails because method [org.utbot.examples.mock.CommonMocksExample.nextValue] produces [java.lang.NullPointerException]
            org.utbot.examples.mock.CommonMocksExample.nextValue(CommonMocksExample.java:21) */
        commonMocksExample.nextValue(null);
    }

}