Fuzzer ignores generics of `class StringMap extends HashMap<String, String>`

[IlyaMuravjov]

Description

Fuzzer tries to put arbitrary Objects into StringMap

To Reproduce

• Set fuzzing to 100%
• Generate tests for the following class

public class StringMap extends HashMap<String, String> {
    public String getAnyString() {
        return keySet().iterator().next();
    }
}

Expected behavior

There's one passing and one failing test.

Actual behavior

No passing tests are generated, one of the tests fails to compile with the following error: "incompatible types: Object cannot be converted to String stringMap.put(object, object1);".

Visual proofs (screenshots, logs, images)

/**
 * @utbot.classUnderTest {@link StringMap}
 * @utbot.methodUnderTest {@link StringMap#getAnyString()}
 */
@Test
@DisplayName("getAnyString:  -> throw ClassCastException")
public void testGetAnyStringThrowsCCE() {
    StringMap stringMap = new StringMap();
    Object object = new Object();
    Object object1 = new Object();
    stringMap.put(object, object1);
    
    /* This test fails because method [org.example.StringMap.getAnyString] produces [java.lang.ClassCastException: class java.lang.Object cannot be cast to class java.lang.String (java.lang.Object and java.lang.String are in module java.base of loader 'bootstrap')]
        org.example.StringMap.getAnyString(StringMap.java:7) */
    stringMap.getAnyString();
}

[alisevych]

A very similar issue is reproducing on spring-petclinic project with PetController tests.
Is it the same?
Tests are not compiling.

ModelMap is spring framework type extending LinkedHashMap<String, Object>
Fuzzer is generating Objects as keys to fill it.

	///region FUZZER: TIMEOUTS for method initCreationForm(org.springframework.samples.petclinic.owner.Owner, org.springframework.ui.ModelMap)

	/**
	 * @utbot.classUnderTest {@link PetController}
	 * @utbot.methodUnderTest {@link PetController#initCreationForm(Owner, ModelMap)}
	 */
	@Test
	@DisplayName("initCreationForm: owner = mock(), model = collection")
	@Timeout(value = 1000L, unit = TimeUnit.MILLISECONDS)
	public void testInitCreationForm1() {
		Owner ownerMock = mock(Owner.class);
		(((Owner) (doNothing()).when(ownerMock))).addPet(any());
		ModelMap model = new ModelMap();
		Object object = new Object();
		Object object1 = new Object();
		model.put(object, object1);
		Object object2 = new Object();
		Object object3 = new Object();
		model.put(object2, object3);
		Object object4 = new Object();
		Object object5 = new Object();
		model.put(object4, object5);
		Object object6 = new Object();
		Object object7 = new Object();
		model.put(object6, object7);

        /* This execution may take longer than the 1000 ms timeout
         and therefore fail due to exceeding the timeout. */
		assertTimeoutPreemptively(Duration.ofMillis(1000L), () -> petController.initCreationForm(ownerMock, model));
	}

And issue - #2595 - is present too.

[IlyaMuravjov]

A very similar issue is reproducing on spring-petclinic project with PetController tests. Is it the same? Tests are not compiling.

ModelMap is spring framework type extending LinkedHashMap<String, Object> Fuzzer is generating Objects as keys to fill it.

	///region FUZZER: TIMEOUTS for method initCreationForm(org.springframework.samples.petclinic.owner.Owner, org.springframework.ui.ModelMap)

	/**
	 * @utbot.classUnderTest {@link PetController}
	 * @utbot.methodUnderTest {@link PetController#initCreationForm(Owner, ModelMap)}
	 */
	@Test
	@DisplayName("initCreationForm: owner = mock(), model = collection")
	@Timeout(value = 1000L, unit = TimeUnit.MILLISECONDS)
	public void testInitCreationForm1() {
		Owner ownerMock = mock(Owner.class);
		(((Owner) (doNothing()).when(ownerMock))).addPet(any());
		ModelMap model = new ModelMap();
		Object object = new Object();
		Object object1 = new Object();
		model.put(object, object1);
		Object object2 = new Object();
		Object object3 = new Object();
		model.put(object2, object3);
		Object object4 = new Object();
		Object object5 = new Object();
		model.put(object4, object5);
		Object object6 = new Object();
		Object object7 = new Object();
		model.put(object6, object7);

        /* This execution may take longer than the 1000 ms timeout
         and therefore fail due to exceeding the timeout. */
		assertTimeoutPreemptively(Duration.ofMillis(1000L), () -> petController.initCreationForm(ownerMock, model));
	}

And issue - #2595 - is present too.

Yes, it's the same issue.

#2595 only reproduces on UtBot version from #2583 and I hope it will be fixed before #2583 is merged.

[alisevych]

@Markoutte
The issue is reproducing with the PR merged.
I've taken IU plugin from here: https://github.com/UnitTestBot/UTBotJava/actions/runs/6257133258

The following test is generated for spring-petclinic PetController class processCreationForm method:

	@Test
	public void testProcessCreationFormByFuzzer4() {
		Owner ownerMock = mock(Owner.class);
		(((Owner) (doNothing()).when(ownerMock))).addPet(any());
		Pet petMock = mock(Pet.class);
		(when(petMock.getName())).thenReturn("");
		BindingResult resultMock = mock(BindingResult.class);
		(when(resultMock.hasErrors())).thenReturn(true);
		ModelMap model = new ModelMap();
		Object object = new Object();
		model.put(((Object) "\n\t\r"), object);

		String actual = petController.processCreationForm(ownerMock, petMock, resultMock, model);

		String expected = "pets/createOrUpdatePetForm";

		assertEquals(expected, actual);
	}

model.put... is not compiling
Can you please check?