## Project Overview

curl4j is a simple cURL-like Java HTTP client library providing a fluent API for building HTTP requests. It's designed to be minimal with only Apache Commons IO as a dependency.

## Directory Structure

```
curl4j/
├── src/
│   ├── main/java/org/codelibs/curl/
│   │   ├── Curl.java              # Static entry point with factory methods

import static org.junit.Assert.assertThrows;

import com.google.common.collect.ImmutableList;
import com.google.common.testing.NullPointerTester;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.List;
import junit.framework.TestSuite;

 * governing permissions and limitations under the License.
 */
package org.codelibs.core.io;

import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertThat;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Writer;
import java.net.URL;
import java.util.Properties;

}

public final class okhttp3/Cache : java/io/Closeable, java/io/Flushable {
	public static final field Companion Lokhttp3/Cache$Companion;
	public final fun -deprecated_directory ()Ljava/io/File;
	public fun <init> (Ljava/io/File;J)V
	public fun <init> (Lokio/FileSystem;Lokio/Path;J)V
	public fun close ()V
	public final fun delete ()V
	public final fun directory ()Ljava/io/File;
	public final fun directoryPath ()Lokio/Path;

}

public final class okhttp3/Cache : java/io/Closeable, java/io/Flushable {
	public static final field Companion Lokhttp3/Cache$Companion;
	public final fun -deprecated_directory ()Ljava/io/File;
	public fun <init> (Ljava/io/File;J)V
	public fun <init> (Lokio/FileSystem;Lokio/Path;J)V
	public fun close ()V
	public final fun delete ()V
	public final fun directory ()Ljava/io/File;
	public final fun directoryPath ()Lokio/Path;

	public synthetic fun <init> (IILokhttp3/Handshake;Ljava/util/List;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Lokhttp3/HttpUrl;Lokhttp3/Headers;Lokio/ByteString;JLjava/util/List;Ljava/io/IOException;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
	public final fun getBody ()Lokio/ByteString;

        DataStoreException withNPE = new DataStoreException("NPE Error", new NullPointerException("Null value"));
        DataStoreException withCustom = new DataStoreException("Custom Error", new FessSystemException("System error"));

        assertTrue(withIOException.getCause() instanceof java.io.IOException);

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.core.io;

import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.net.URLClassLoader;

import junit.framework.TestCase;

import org.codelibs.core.exception.ResourceNotFoundRuntimeException;

/**

import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertTrue;

import java.io.IOException;

import org.junit.Test;

/**
 * Test class for CurlException.
 * Tests exception creation, message handling, and cause propagation.
 */
public class CurlExceptionTest {

    @Test

 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.util;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.function.Function;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;