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;
import org.codelibs.core.io.SerializeUtil;
import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;

     * @param description
     *            The description of why the state is invalid.
     * @throws ClIllegalStateException
     *             If {@code expression} is false.
     */
    public static void assertState(final boolean expression, final String description) {
        if (!expression) {
            throw new ClIllegalStateException(description);
        }
    }

    /**
     * Asserts that the index is not invalid.