url        *url.URL
	auth       func() string

	sync.RWMutex // mutex for lastErr
	lastErr      error
	lastErrTime  time.Time
}

type restError string

func (e restError) Error() string {
	return string(e)
}

func (e restError) Timeout() bool {
	return true
}

// Given a string of the form "host", "host:port", or "[ipv6::address]:port",
// return true if the string includes a port.

				mu.Unlock()
			}
		}(i)
	}
	wg.Wait()

	// We already saw write failures, no need to proceed into read's
	if retError != "" {
		return SpeedTestResult{
			Uploads:     totalBytesWritten,
			Downloads:   totalBytesRead,
			UploadTimes: uploadTimes,
			Error:       retError,
		}, nil
	}

	downloadsCtx, downloadsCancel := context.WithTimeout(ctx, opts.duration)
	defer downloadsCancel()

    void testRenewCredentials_True() {
        // Test renewCredentials(String locationHint, Throwable error) method when true
        String locationHint = "testLocation";
        Throwable error = new RuntimeException("testError");
        when(mockDelegate.renewCredentials(locationHint, error)).thenReturn(true);
        assertTrue(cifsContextWrapper.renewCredentials(locationHint, error));

            assertTrue(response.isReceived());
            assertSame(testException, response.getException());
        }

        @Test
        @DisplayName("Should handle error")
        void testError() throws InterruptedException {
            CountDownLatch latch = new CountDownLatch(1);

            Thread waiter = new Thread(() -> {
                synchronized (response) {
                    try {

        // Then
        assertFalse(isError);
        verify(response).isError();
    }

    @Test
    @DisplayName("Test Response interface methods - error")
    void testError() {
        // Given
        doNothing().when(response).error();

        // When
        response.error();

        // Then
        verify(response).error();
    }

    @Test