// getMessage() may return null when constructed with null
        // This is expected behavior for exceptions with null cause
    }

    public void test_nestedCause() {
        // Test with nested exceptions
        RuntimeException rootCause = new RuntimeException("Root cause");
        ParseException parseException = new ParseException("Parse error");
        parseException.initCause(rootCause);

        assertEquals(0, SessionSetupHandler.class.getDeclaredFields().length, "No fields expected");
        assertEquals(0, SessionSetupHandler.class.getDeclaredClasses().length, "No nested types expected");
    }

    @ParameterizedTest(name = "Implementation is instance: {0}")
    @MethodSource("implementations")
    @DisplayName("Happy path: can create implementations and use type checks")

        assertEquals(this.getClass().getName(), firstElement.getClassName());
        assertEquals("test_stackTracePresent", firstElement.getMethodName());
    }

    public void test_nestedExceptionChain() {
        // Test nested exception chain
        Throwable rootCause = new IllegalArgumentException("Root cause");
        Throwable middleCause = new IllegalStateException("Middle cause", rootCause);

        assertEquals(message, exception.getMessage());
        assertNull(exception.getCause());
    }

    public void test_constructor_withNestedCause() {
        // Test constructor with nested exceptions
        Throwable rootCause = new IllegalStateException("Root cause");
        Throwable intermediateCause = new RuntimeException("Intermediate cause", rootCause);
        String message = "Top level error";

![editor support](https://fastapi.tiangolo.com/img/pycharm-completion.png)


Daha önceden düşünüp en imkansız diyebileceğin durumlarda bile otomatik tamamlama alacaksın, örnek olarak `price` JSON body içerisinde (nested bir JSON body de olabilirdi.) direkt olarak istekten geliyor, bu durumda bile oto-tammalama sağlıyor.

import java.lang.reflect.Field;
import java.net.Socket;
import java.util.concurrent.atomic.AtomicLong;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.mockito.Mock;
import org.mockito.junit.jupiter.MockitoExtension;
import org.mockito.junit.jupiter.MockitoSettings;

                        attributes.put(name, parseArray(jsonParser));
                    } else if (jsonParser.getCurrentToken() == JsonToken.START_OBJECT) {
                        // Handle nested object type
                        attributes.put(name, parseObject(jsonParser));
                    } else {
                        // Handle primitive types (string, number, boolean, etc.)

import static org.mockito.Mockito.never;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;

import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.ValueSource;

        StackTraceElement topElement = stackTrace[0];
        assertEquals(this.getClass().getName(), topElement.getClassName());
    }

    public void test_nestedExceptions() {
        // Test nested exception handling
        Exception level3 = new RuntimeException("Level 3 error");
        Exception level2 = new IllegalStateException("Level 2 error", level3);

	// Composite Index: Flattened structure.
	Data0A string `gorm:"index:,composite:comp_id0"`
	Data0B string `gorm:"index:,composite:comp_id0"`

	// Composite Index: Nested structure.
	Data1A string `gorm:"index:,composite:comp_id1"`
	CompIdxLevel1C

	// Composite Index: Unique and priority.
	Data2A string `gorm:"index:,unique,composite:comp_id2,priority:2"`
	CompIdxLevel2C
}