public void close() {
        if (connected && rpcHandle != null) {
            try {
                log.debug("Closing witness RPC client");
                rpcHandle.close();
                connected = false;
                rpcHandle = null;
            } catch (Exception e) {
                log.error("Error closing witness RPC client", e);
            }
        }
    }

    taskFaker.runTasks()
    assertThat(client.closed).isFalse()
    server.processNextFrame() // Read client closing, send server close.
    server.listener.assertClosing(1000, "Hello!")
    server.webSocket!!.finishReader()
    server.webSocket!!.close(1000, "Goodbye!")
    client.processNextFrame() // Read server closing, close connection.
    taskFaker.runTasks()
    client.listener.assertClosing(1000, "Goodbye!")

     * @throws CIFSException if an error occurs getting the output stream
     */
    OutputStream getOutput() throws CIFSException;

    /**
     * {@inheritDoc}
     *
     * @throws CIFSException if an error occurs closing the handle
     *
     * @see java.lang.AutoCloseable#close()
     */
    @Override
    void close() throws CIFSException;

    /**
     * Tests whether this file descriptor is open and valid.
     *

import java.io.InputStream;
import java.io.Reader;
import junit.framework.TestCase;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unit tests for {@link Closeables}.
 *
 * <p>Checks proper closing behavior, and ensures that IOExceptions on Closeable.close() are not
 * propagated out from the {@link Closeables#close} method if {@code swallowException} is true.
 *
 * @author Michael Lancaster
 */
@NullUnmarked

	{"3>>(1<<63)", "negative right shift count"},
	{"(1<<63)>>2", "right shift of value with high bit set"},
	{"(1<<62)>>2", ""},
	{`'\x80'`, "illegal UTF-8 encoding for character constant"},
	{"(23*4", "missing closing paren"},
	{")23*4", "unexpected ) evaluating expression"},
	{"18446744073709551616", "value out of range"},
}

func TestBadExpr(t *testing.T) {
	for i, test := range badExprTests {
		err := runBadTest(i, test, t)

 * an open file (for cached responses). Failing to close the response body will leak resources and
 * may ultimately cause the application to slow down or crash.
 *
 * Both this class and [Response] implement [Closeable]. Closing a response simply
 * closes its response body. If you invoke [Call.execute] or implement [Callback.onResponse] you
 * must close this body by calling any of the following methods:
 *
 * * `Response.close()`

        assertFalse(auth.isClosed());

        // Close the authenticator
        auth.close();

        // Verify it's closed
        assertTrue(auth.isClosed());
        // Cannot check password after closing as it now throws IllegalStateException
        // This is actually good security practice - closed authenticators cannot be accessed

        // Verify multiple closes don't cause issues

        running.set(false);

        if (serverSocket != null && !serverSocket.isClosed()) {
            try {
                serverSocket.close();
            } catch (IOException e) {
                log.debug("Error closing server socket", e);
            }
        }

        if (serverThread != null) {
            try {
                serverThread.join(5000); // Wait up to 5 seconds
            } catch (InterruptedException e) {

        assertTrue(s.contains(",flags=0x00"), "toString should include flags in hex");
        assertTrue(s.endsWith("]"), "toString should end with closing bracket");
    }

 *   <li><b>Convenience methods:</b> These are implementations of common operations that are
 *       typically implemented by opening a stream using one of the methods in the first category,
 *       doing something and finally closing the stream that was opened.
 * </ul>
 *
 * <p><b>Note:</b> In general, {@code ByteSource} is intended to be used for "file-like" sources
 * that provide streams that are:
 *
 * <ul>