import org.junit.jupiter.api.Test;

/**
 * Comprehensive test suite for EmptyIterator class.
 * Tests the implementation of CloseableIterator for empty collections.
 */
@DisplayName("EmptyIterator Tests")
class EmptyIteratorTest extends BaseTest {

    private EmptyIterator emptyIterator;

    @BeforeEach
    void setUp() {
        emptyIterator = new EmptyIterator();
    }

    @Test

    }

    @Override
    Iterator<Entry<Cut<C>, Range<C>>> entryIterator() {
      if (restriction.isEmpty()) {
        return emptyIterator();
      }
      Iterator<Range<C>> completeRangeItr;
      if (lowerBoundWindow.upperBound.isLessThan(restriction.lowerBound)) {
        return emptyIterator();
      } else if (lowerBoundWindow.lowerBound.isLessThan(restriction.lowerBound)) {

import static com.google.common.base.Predicates.compose;
import static com.google.common.base.Predicates.in;
import static com.google.common.base.Predicates.not;
import static com.google.common.collect.Iterators.emptyIterator;
import static com.google.common.collect.Maps.immutableEntry;
import static java.util.Collections.emptyMap;
import static java.util.Objects.requireNonNull;

import com.google.common.annotations.GwtIncompatible;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.collect.Iterables.getOnlyElement;
import static com.google.common.collect.Iterators.emptyIterator;
import static com.google.common.collect.Iterators.peekingIterator;
import static com.google.common.collect.Range.rangeLexOrdering;
import static com.google.common.collect.SortedLists.KeyAbsentBehavior.NEXT_HIGHER;

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.common.collect;

import static com.google.common.collect.Iterators.emptyIterator;
import static com.google.common.truth.Truth.assertThat;
import static java.lang.reflect.Modifier.STATIC;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.atLeast;

 * the License.
 */

package com.google.common.collect;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.collect.Iterators.emptyIterator;
import static com.google.common.collect.Iterators.singletonIterator;
import static com.google.common.truth.Truth.assertThat;
import static java.util.Arrays.asList;
import static org.junit.Assert.assertThrows;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.collect.Iterables.getOnlyElement;
import static com.google.common.collect.Iterators.emptyIterator;
import static com.google.common.collect.Iterators.peekingIterator;
import static com.google.common.collect.Range.rangeLexOrdering;
import static com.google.common.collect.SortedLists.KeyAbsentBehavior.NEXT_HIGHER;

        assertFalse(iterator.hasNext());
        assertNull(iterator.next());

        verify(resource, never()).close();
    }

    @Test
    @DisplayName("Empty iterator")
    void emptyIterator() {
        when(delegate.hasNext()).thenReturn(false);

        TestIterator iterator = new TestIterator(null);

        assertFalse(iterator.hasNext());
        assertNull(iterator.next());
    }

import static com.google.common.collect.CollectPreconditions.checkEntryNotNull;
import static com.google.common.collect.CollectPreconditions.checkNonnegative;
import static com.google.common.collect.Iterators.emptyIterator;
import static com.google.common.collect.Maps.immutableEntry;
import static java.lang.Math.max;
import static java.util.Arrays.asList;
import static java.util.Objects.requireNonNull;

 * limitations under the License.
 */

package com.google.common.collect;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.collect.Iterators.emptyIterator;
import static com.google.common.collect.Iterators.singletonIterator;
import static com.google.common.collect.ReflectionFreeAssertThrows.assertThrows;
import static com.google.common.truth.Truth.assertThat;