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

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

        assertNotNull(exception.getStackTrace());
        assertTrue(exception.getStackTrace().length > 0);
    }

    @Test
    public void test_nestedExceptions() {
        // Test nested exceptions
        Exception innerCause = new IllegalArgumentException("Invalid argument");
        Exception middleCause = new RuntimeException("Runtime error", innerCause);

Shinsuke Sugaya <******@****.***> 1768120985 +0900