Other class is not mocked as required

[alisevych]

Description

When Mocking strategy is set to "Other classes: Mockito" - other classes should be mocked in all tests.

To Reproduce

Steps to reproduce the behavior:

1. Run IntelliJ IDEA 2022.1.4 with one of the latest builds of UTBot plugin from main branch installed.
2. Open UTBotJava project
3. Find utbot-sample/src/main/java/org/utbot/examples/mock/CommonMocksExample.java
4. Generate tests for nextValue() method with Mocking strategy is set to "Other classes: Mockito"
5. Open the generated test

Expected behavior

RecursiveTypeClass used as the input parameter of the method is supposed to be mocked in all tests - except the one with null used.

Actual behavior

There are 4 tests generated. RecursiveTypeClass is mocked only in one test.

Visual proofs (screenshots, logs, images)

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);
    }

}

Environment

Windows 10 Pro
Gradle project
JDK 8

Additional context

When generating tests for MockWithFieldExample with same setting : Other classes : Mockito - VersionStamp is not mocked either

[CaelmBleidd]

I checked it. There are two important points:

1. At the moment, I have four executions for this test at the latest master: two symbolic and two made by fuzzer, although we had all four made by the symbolic engine. I'm not sure whether it is expected behaviour or not, maybe @dtim has something to say about it;
2. Seems like the fuzzer doesn't know anything about the mock strategy, therefore it generates tests without them (for example, the longest method is made by the fuzzer). So, I think I can reassign this issue to @Markoutte since it is not the engine's mistake