val bodySource = response.body.source()
    assertThat(bodySource.readByte()).isEqualTo('d'.code.toByte())

    // The second byte of this request will be delayed by 750ms so we should time out after 250ms.
    val startNanos = System.nanoTime()
    bodySource.use {
      assertFailsWith<IOException> {
        bodySource.readByte()
      }.also { expected ->
        // Timed out as expected.

        final long start = System.nanoTime();
        controller.delayForWaitingNewUrl();
        final long elapsed = (System.nanoTime() - start) / 1000000;

        assertTrue("Expected at least 200ms delay", elapsed >= 180);
    }

    /**
     * Test that negative delay values are handled (treated as zero)
     */
    public void test_negativeDelayValues() {