@Test
    @DisplayName("Test invalid configuration")
    void testInvalidConfiguration() {
        assertThrows(IllegalArgumentException.class, () -> new SimpleCircuitBreaker("invalid", 0, 2, 100));
        assertThrows(IllegalArgumentException.class, () -> new SimpleCircuitBreaker("invalid", 3, 0, 100));
        assertThrows(IllegalArgumentException.class, () -> new SimpleCircuitBreaker("invalid", 3, 2, -1));
    }

    @Test

        // Test that invalid valueOf throws exception
        assertThrows(IllegalArgumentException.class, () -> {
            WitnessServiceType.valueOf("INVALID_TYPE");
        });

        assertThrows(IllegalArgumentException.class, () -> {
            WitnessVersion.valueOf("INVALID_VERSION");
        });

        assertThrows(IllegalArgumentException.class, () -> {

package jcifs.dcerpc.ndr;

import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.mockito.Mockito.verify;

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

/**
 * Tests for the NdrObject abstract class.

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertSame;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import java.security.Principal;

import org.junit.jupiter.api.DisplayName;

  public void testContainsEntryNullDisallowedBecauseKeyQueriesDisallowed() {
    assertThrows(NullPointerException.class, () -> multimap().containsEntry(null, v3()));
  }

  @MapFeature.Require(absent = ALLOWS_NULL_VALUE_QUERIES)
  public void testContainsEntryNullDisallowedBecauseValueQueriesDisallowed() {
    assertThrows(NullPointerException.class, () -> multimap().containsEntry(k3(), null));
  }

    }

    @Test
    @DisplayName("encode should throw NPE on null input")
    void testEncodeNull() {
        assertThrows(NullPointerException.class, () -> Base64.encode(null));
    }

    @Test
    @DisplayName("decode should throw NPE on null input")
    void testDecodeNull() {
        assertThrows(NullPointerException.class, () -> Base64.decode(null));
    }

    StringBuilder builder = new StringBuilder();
    Writer writer = new AppendableWriter(builder);

    writer.write("Hi");
    writer.close();

    assertThrows(IOException.class, () -> writer.write(" Greg"));

    assertThrows(IOException.class, () -> writer.flush());

    // close()ing already closed writer is allowed
    writer.close();
  }

            // Act + Assert
            SmbException ex = assertThrows(SmbException.class, () -> new SID(bad));
            assertTrue(ex.getMessage().contains("Bad textual SID format"));
        }

        @Test
        @DisplayName("Textual constructor null throws NullPointerException")
        void testTextualConstructorNull() {
            assertThrows(NullPointerException.class, () -> new SID((String) null));
        }

import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_PUT;
import static com.google.common.collect.testing.google.ReflectionFreeAssertThrows.assertThrows;
import static java.util.Collections.singletonList;

import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.Iterators;
import com.google.common.collect.Multimap;

        assertThrows(NoSuchMethodException.class, () -> SessionSetupHandler.class.getDeclaredConstructor());
    }

    @Test
    @DisplayName("Invalid: resolving class by null name throws NPE")
    void testClassForNameWithNull() {
        // Intent: demonstrate defensive behavior with null when resolving this type by name
        assertThrows(NullPointerException.class, () -> Class.forName(null));
    }