Functional interfaces defined as class members - InaccessibleObjectException on test generation

[alisevych]

Description

Test generation for Functional interfaces defined as class members - fails with InaccessibleObjectException from constructCompositeModel

To Reproduce

Steps to reproduce the behavior:

1. Open IntelliJ IDEA
2. Plugin is installed
3. Create a new project with JDK 8
4. Add a class LambdaVarExample (see below)
5. Run test generation
6. Repeat 3-5 steps for a project with JDK 11

import java.util.function.Predicate;

public class LambdaVarExample {

    private Predicate<? super String> byCondition = l -> l.contains("b");

    public void runTest(String input) {
        if (byCondition.test(input)) {
            firstScenario();
        } else {
            secondScenario();
        }
    }

    private void firstScenario() {
        System.out.println("1");
    }

    private void secondScenario() {
        System.out.println("2");
    }

}

Expected behavior

5-6. Tests are supposed to be generated without errors.

Actual behavior

An error test is generated with information about...
5. JDK 8 - ClassNotFoundException in concrete...
6. JDK 11 - InaccessibleObjectException in constructCompositeModel.

Visual proofs (screenshots, logs, images)

5. JDK 8 error:

public void testRunTest_errors() {
        // Couldn't generate some tests. List of errors:
        // 
        // 1 occurrences of:
        // Default concrete execution failed

        // 1 occurrences of:
        /* Error in the child process |> java.lang.ClassNotFoundException: jdk.internal.logger.SimpleConsoleLogger$CallerFinder
        		at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
        		at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
        		at org.utbot.instrumentation.process.HandlerClassesLoader.loadClass(ChildProcess.kt:38)
        		at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
        		at org.utbot.framework.concrete.MockValueConstructor.kClass(MockValueConstructor.kt:470)
        		at org.utbot.framework.concrete.MockValueConstructor.javaClass(MockValueConstructor.kt:455)
        		at org.utbot.framework.concrete.MockValueConstructor.constructObject(MockValueConstructor.kt:158)
        		at org.utbot.framework.concrete.MockValueConstructor.construct(MockValueConstructor.kt:127)
        		at org.utbot.framework.concrete.MockValueConstructor.constructObject(MockValueConstructor.kt:184)
        		at org.utbot.framework.concrete.MockValueConstructor.construct(MockValueConstructor.kt:127)
        		at org.utbot.framework.concrete.MockValueConstructor.constructMethodParameters(MockValueConstructor.kt:104)
        		at org.utbot.framework.concrete.UtExecutionInstrumentation.invoke(UtExecutionInstrumentation.kt:144)
        		at org.utbot.framework.concrete.UtExecutionInstrumentation.invoke(UtExecutionInstrumentation.kt:107)
        		at org.utbot.instrumentation.process.ChildProcessKt.loop(ChildProcess.kt:133)
        		at org.utbot.instrumentation.process.ChildProcessKt.main(ChildProcess.kt:77)
        		at org.utbot.instrumentation.process.ChildProcessKt.main(ChildProcess.kt)
        	 */

    }

6. JDK 11 error:

public void testRunTest_errors() {
        // Couldn't generate some tests. List of errors:
        // 
        // 1 occurrences of:
        /* Error in the child process |> java.lang.reflect.InaccessibleObjectException: Unable to make
        field private boolean jdk.internal.logger.SimpleConsoleLogger$CallerFinder.lookingForLogger accessible: module java.base does not "opens
        jdk.internal.logger" to unnamed module @29e6eb25
        		at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:340)
        		at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:280)
        		at java.base/java.lang.reflect.Field.checkCanSetAccessible(Field.java:176)
        		at java.base/java.lang.reflect.Field.setAccessible(Field.java:170)
        		at org.utbot.framework.concrete.UtModelConstructor.constructCompositeModel(UtModelConstructor.kt:356)
        		at org.utbot.framework.concrete.UtModelConstructor.constructFromAny(UtModelConstructor.kt:239)
        		at org.utbot.framework.concrete.UtModelConstructor.construct(UtModelConstructor.kt:107)
        		at org.utbot.framework.concrete.UtModelConstructor.constructCompositeModel(UtModelConstructor.kt:285)
        		at org.utbot.framework.concrete.UtModelConstructor.constructFromAny(UtModelConstructor.kt:239)
        		at org.utbot.framework.concrete.UtModelConstructor.construct(UtModelConstructor.kt:107)
        		at org.utbot.framework.concrete.UtExecutionInstrumentation$invoke$$inlined$withReflection$lambda$1.invoke(UtExecutionInstrumentation.kt:179)
        		at org.utbot.framework.concrete.UtExecutionInstrumentation$invoke$$inlined$withReflection$lambda$1.invoke(UtExecutionInstrumentation.kt:107)
        		at org.utbot.framework.concrete.UtExecutionInstrumentation.withStaticFields(UtExecutionInstrumentation.kt:269)
        		at org.utbot.framework.concrete.UtExecutionInstrumentation.invoke(UtExecutionInstrumentation.kt:153)
        		at org.utbot.framework.concrete.UtExecutionInstrumentation.invoke(UtExecutionInstrumentation.kt:107)
        		at org.utbot.instrumentation.process.ChildProcessKt.loop(ChildProcess.kt:133)
        		at org.utbot.instrumentation.process.ChildProcessKt.main(ChildProcess.kt:77)
        		at org.utbot.instrumentation.process.ChildProcessKt.main(ChildProcess.kt)
        	 */

    }

Environment

Windows 10 Pro
IntelliJ IDEA 2022.1.3
JDK 8, 11
One of the latest plugin build: https://github.com/UnitTestBot/UTBotJava/actions/runs/2621106151

[Damtev]

• JDK 8 - cannot reproduce ClassNotFoundException, but got Default concrete execution failed error, which comes from fuzzer - @Markoutte take a look, please. Also, found wrong assertions from symbolic assertions (see the attached screenshot) - going to investigate.
  
• JDK 11 - found the mentioned exception in runIde logs, and no expected non-exceptional executions - going to investigate. Also, Default concrete execution failed error again - @Markoutte take a look too, please.

[Markoutte]

@Damtev looks like the problem that we cannot find lambda class to construct concrete "this" object. In this case the field cannot be created because Predicate uses a lambda. If we use anonymous class it works ok for fuzzer:

    private Predicate<? super String> byCondition = new Predicate<String>() {
        @Override
        public boolean test(String s) {
            return s.contains("b");
        }
    };

You can find the field gathering in UtModelConstructor#constructCompositeModel:295:

.forEach { it.withAccessibility { fields[it.fieldId] = construct(it.get(value), it.type.id) } }