## Making your change

### Code change guidelines

All code contributions should contain the following:

* Create unit tests using [Spock](https://spockframework.org/spock/docs/2.0/index.html) for new classes or methods that you introduce.
* Create integration tests that exercise a Gradle build for the bug/feature. 

import com.google.common.annotations.J2ktIncompatible;
import com.google.common.testing.NullPointerTester;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.math.RoundingMode;
import java.util.Random;
import junit.framework.TestCase;

/**
 * Tests for {@link IntMath}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible(emulated = true)
public class IntMathTest extends TestCase {
  public void testMaxSignedPowerOfTwo() {

import org.codelibs.core.misc.Pair;
import org.codelibs.core.misc.Tuple3;
import org.codelibs.fess.exception.FessSystemException;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.unit.UnitFessTestCase;
import org.codelibs.fess.util.ComponentUtil;
import org.lastaflute.web.response.HtmlResponse;

public class SystemHelperTest extends UnitFessTestCase {

    public SystemHelper systemHelper;

import com.google.common.annotations.J2ktIncompatible;
import com.google.common.testing.NullPointerTester;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.math.RoundingMode;
import java.util.Random;
import junit.framework.TestCase;

/**
 * Tests for {@link IntMath}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible(emulated = true)
public class IntMathTest extends TestCase {
  public void testMaxSignedPowerOfTwo() {

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import junit.framework.TestCase;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * Tests for {@code BaseEncoding}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible(emulated = true)

import org.dbflute.dbmeta.name.ColumnRealName;
import org.dbflute.dbmeta.name.ColumnSqlName;
import org.dbflute.exception.InvalidQueryRegisteredException;
import org.dbflute.util.Srl;
import org.opensearch.common.unit.Fuzziness;
import org.opensearch.index.query.BoolQueryBuilder;
import org.opensearch.index.query.CommonTermsQueryBuilder;
import org.opensearch.index.query.ExistsQueryBuilder;
import org.opensearch.index.query.IdsQueryBuilder;

import org.dbflute.dbmeta.name.ColumnRealName;
import org.dbflute.dbmeta.name.ColumnSqlName;
import org.dbflute.exception.InvalidQueryRegisteredException;
import org.dbflute.util.Srl;
import org.opensearch.common.unit.Fuzziness;
import org.opensearch.index.query.BoolQueryBuilder;
import org.opensearch.index.query.CommonTermsQueryBuilder;
import org.opensearch.index.query.ExistsQueryBuilder;
import org.opensearch.index.query.IdsQueryBuilder;

- github.com/hashicorp/memberlist: [v0.1.3](https://github.com/hashicorp/memberlist/tree/v0.1.3)
- github.com/hashicorp/serf: [v0.8.2](https://github.com/hashicorp/serf/tree/v0.8.2)
- github.com/jstemmer/go-junit-report: [af01ea7](https://github.com/jstemmer/go-junit-report/tree/af01ea7)
- github.com/jtolds/gls: [v4.20.0+incompatible](https://github.com/jtolds/gls/tree/v4.20.0)
- github.com/mattn/go-colorable: [v0.0.9](https://github.com/mattn/go-colorable/tree/v0.0.9)

import java.lang.reflect.Modifier;
import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.ConcurrentMap;
import junit.framework.Assert;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A test utility that verifies that your methods and constructors throw {@link

import com.google.common.testing.NullPointerTester;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.math.RoundingMode;
import java.util.Arrays;
import java.util.List;
import junit.framework.TestCase;

/**
 * Tests for {@code DoubleMath}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible(emulated = true)
public class DoubleMathTest extends TestCase {