assertSame(exception, e.getCause());
        } catch (IOException e) {
            fail("Should throw CurlException, not IOException");
        }
    }

    @Test
    public void testGetContentWithParser() throws IOException {
        CurlResponse response = new CurlResponse();
        response.setEncoding("UTF-8");
        String testContent = "42";

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

import java.io.File;
import java.io.IOException;

import org.codelibs.curl.Curl;
import org.junit.Test;

public class ContentOutputStreamTest {

    @Test
    public void inMemory() throws IOException {
        ContentOutputStream cos = new ContentOutputStream(10, Curl.tmpDir);
        cos.write(new byte[] { 0, 1, 2, 3, 4 });

            conn.connect();
            fail("Should throw IOException");
        } catch (IOException e) {
            assertTrue(e.getMessage().contains("GCS_PROJECT_ID is blank"));
        }

        // Second call should also fail with the same error
        try {
            conn.connect();
            fail("Should throw IOException");
        } catch (IOException e) {

     *
     * @throws IOException if an I/O error occurs (not thrown in this implementation)
     */
    @Override
    public void close() throws IOException {
        // inputStream.close();
    }

    /**
     * Returns the number of bytes that can be read from this input stream without blocking.
     *
     * @return the number of bytes available
     * @throws IOException if an I/O error occurs
     */

        // Should throw IOException when file doesn't exist
        try {
            cache.close();
            fail("Expected IOException for non-existent file");
        } catch (IOException e) {
            // Expected - file doesn't exist
        }
    }

    @Test
    public void testMemoryCacheWithBinaryData() throws IOException {
        // Test with binary data containing all byte values

  }

  public void testGetClassPathFromManifest_noClassPath() throws IOException {
    File jarFile = new File("base.jar");
    assertThat(ClassPath.getClassPathFromManifest(jarFile, manifest(""))).isEmpty();
  }

  public void testGetClassPathFromManifest_emptyClassPath() throws IOException {
    File jarFile = new File("base.jar");

     *
     * @param u The URL to open a connection to
     * @return A new S3URLConnection instance
     * @throws IOException If the connection cannot be opened
     */
    @Override
    protected URLConnection openConnection(final URL u) throws IOException {
        return new S3URLConnection(u);
    }

    /**
     * S3URLConnection is a URL connection implementation for accessing S3 objects.

     *
     * @param in the input stream containing the new mapping file content
     * @throws IOException if an I/O error occurs during the update
     */
    public synchronized void update(final InputStream in) throws IOException {
        try (MappingUpdater updater = new MappingUpdater(null)) {
            reload(updater, in);
        }
    }

    /**

     *
     * @param u The URL to open a connection to
     * @return A new StorageURLConnection instance
     * @throws IOException If the connection cannot be opened
     */
    @Override
    protected URLConnection openConnection(final URL u) throws IOException {
        return new StorageURLConnection(u);
    }

    /**

            if (!connected) {
                connect();
            }
            try {
                final Blob blobObj = getBlob();
                if (blobObj == null) {
                    throw new IOException("Object not found: bucket=" + bucketName + ", object=" + objectName);
                }
                return Channels.newInputStream(blobObj.reader());
            } catch (final IOException e) {