assertTrue(content.contains("number_of_shards"));
    }

    @Test(expected = IOException.class)
    public void testLoadJsonResource_nonExistingResource() throws IOException {
        SettingsResourceLoader.loadJsonResource("non_existing_resource.json");
    }

    @Test
    public void testLoadJsonResourceWithSubstitution() throws IOException {
        Map<String, String> substitutions = new HashMap<>();

    }
  }

  @Throws(IOException::class)
  fun flush() {
    withLock {
      if (closed) throw IOException("closed")
      sink.flush()
    }
  }

  @Throws(IOException::class)
  fun rstStream(
    streamId: Int,
    errorCode: ErrorCode,
  ) {
    withLock {
      if (closed) throw IOException("closed")
      require(errorCode.httpCode != -1)

    }

    @Test
    @DisplayName("readPacketType should throw IOException on EOF")
    void testReadPacketTypeEOF() {
        ByteArrayInputStream bais = new ByteArrayInputStream(new byte[0]);
        byte[] buffer = new byte[10];

        IOException exception = assertThrows(IOException.class, () -> {
            SessionServicePacket.readPacketType(bais, buffer, 0);
        });

     *
     * @param request the request to create a key for
     * @throws IOException if an I/O error occurs
     */
    protected abstract void makeKey(Request request) throws IOException;

    /**
     * Reads and returns the key of the next message without consuming it.
     *
     * @return the request key of the next message
     * @throws IOException if an I/O error occurs
     */

    /** Append space-prefixed lengths to [writer]. */
    @Throws(IOException::class)
    internal fun writeLengths(writer: BufferedSink) {
      for (length in lengths) {
        writer.writeByte(' '.code).writeDecimalLong(length)
      }
    }

    @Throws(IOException::class)
    private fun invalidLengths(strings: List<String>): Nothing = throw IOException("unexpected journal line: $strings")

    /**

    }

    @Test
    void testWithEmptyUrl() throws IOException {
        testInheritance("empty-urls", false);
    }

    public void testInheritance(String baseName) throws IOException {
        testInheritance(baseName, false);
        testInheritance(baseName, true);
    }

    public void testInheritance(String baseName, boolean fromRepo) throws IOException {
        Model parent = getModel(baseName + "-parent");

    /**
     *
     * @param reader a reader object.
     * @param strict a strict object.
     * @throws IOException IOException if any.
     * @throws XmlPullParserException XmlPullParserException if
     * any.
     * @return Model
     */
    public Model read(Reader reader, boolean strict) throws IOException, XmlPullParserException {
        return read(reader, strict, null);
    } // -- Model read( Reader, boolean )

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 });

     *
     * @throws IOException if connection fails
     */
    private void testConnection() throws IOException {
        // For now, just test basic connectivity to RPC endpoint
        try (java.net.Socket socket = new java.net.Socket()) {
            socket.connect(new java.net.InetSocketAddress(serverAddress, WITNESS_RPC_PORT), WITNESS_RPC_TIMEOUT_MS);
        } catch (IOException e) {

   */
  @Throws(IOException::class)
  fun processNextFrame() {
    check(!closed) { "closed" }

    readHeader()
    if (isControlFrame) {
      readControlFrame()
    } else {
      readMessageFrame()
    }
  }

  @Throws(IOException::class, ProtocolException::class)
  private fun readHeader() {
    if (receivedCloseFrame) throw IOException("closed")