import static org.hamcrest.CoreMatchers.notNullValue;
import static org.hamcrest.CoreMatchers.nullValue;
import static org.junit.Assert.assertThat;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.NoSuchElementException;

import org.codelibs.core.exception.ClIllegalStateException;
import org.codelibs.core.exception.ClIndexOutOfBoundsException;