sink.writeLines(lines.stream(), separator);

    assertContainsExpectedLines(separator);
  }

  private void assertContainsExpectedString() throws IOException {
    assertThat(factory.getSinkContents()).isEqualTo(expected);
  }

  private void assertContainsExpectedLines(String separator) throws IOException {
    String expected = expectedLines.isEmpty() ? "" : Joiner.on(separator).join(expectedLines);

    // already finished (we explicitly set the result of it above).
    listenableFuture.addListener(singleCallListener, directExecutor());
    assertThat(listenableFuture.get()).isEqualTo(DATA1);

    // 'spy' should have been ignored since 'abstractFuture' was done before
    // a listener was added.
    assertFalse(spy.wasExecuted);
    assertTrue(singleCallListener.wasCalled());

@NullUnmarked
public class FuturesGetDoneTest extends TestCase {
  public void testSuccessful() throws ExecutionException {
    assertThat(getDone(immediateFuture("a"))).isEqualTo("a");
  }

  public void testSuccessfulNull() throws ExecutionException {
    assertThat(getDone(immediateVoidFuture())).isEqualTo(null);
  }

  public void testFailed() {
    Exception failureCause = new Exception();
    ExecutionException expected =

    EnumHashBiMap<Currency, String> bimap = EnumHashBiMap.create(Currency.class);
    assertTrue(bimap.isEmpty());
    assertThat(bimap.toString()).isEqualTo("{}");
    assertEquals(HashBiMap.create(), bimap);
    bimap.put(Currency.DOLLAR, "dollar");
    assertThat(bimap.get(Currency.DOLLAR)).isEqualTo("dollar");
    assertEquals(Currency.DOLLAR, bimap.inverse().get("dollar"));
  }

  public void testCreateFromMap() {

    assertEquals(3, hashCodes.size());
  }

  public void testToString() {
    assertThat(SIP_WITH_KEY.toString()).isEqualTo("Hashing.sipHash24(" + K0 + ", " + K1 + ")");
    assertThat(SIP_WITHOUT_KEY.toString()).isEqualTo("Hashing.sipHash24(" + K0 + ", " + K1 + ")");
    assertThat(sipHash24(20, 13).toString()).isEqualTo("Hashing.sipHash24(20, 13)");
  }

  private static void assertSip(String input, long expected) {

    assertEquals(3, hashCodes.size());
  }

  public void testToString() {
    assertThat(SIP_WITH_KEY.toString()).isEqualTo("Hashing.sipHash24(" + K0 + ", " + K1 + ")");
    assertThat(SIP_WITHOUT_KEY.toString()).isEqualTo("Hashing.sipHash24(" + K0 + ", " + K1 + ")");
    assertThat(sipHash24(20, 13).toString()).isEqualTo("Hashing.sipHash24(20, 13)");
  }

  private static void assertSip(String input, long expected) {

    assertEscaping(e, "%27", '\'');

    // Plus for spaces
    assertEscaping(e, "+", ' ');
    assertEscaping(e, "%2B", '+');

    assertThat(e.escape("safe with spaces")).isEqualTo("safe+with+spaces");
    assertThat(e.escape("******@****.***")).isEqualTo("foo%40bar.com");
  }

  public void testUrlPathSegmentEscaper() {
    UnicodeEscaper e = (UnicodeEscaper) urlPathSegmentEscaper();
    assertPathEscaper(e);

      String expected = Ascii.toLowerCase(fieldName).replaceAll("_", ".");
      assertThat(property.key()).isEqualTo(expected);
    }
  }

  public void testGetValue() {
    for (StandardSystemProperty property : StandardSystemProperty.values()) {
      assertThat(property.value()).isEqualTo(System.getProperty(property.key()));
    }
  }

  public void testToString() {

    assumeNetwork()

    val request = Request.Builder().url("https://mozilla.org/robots.txt").build()

    client.newCall(request).execute().use {
      assertThat(it.protocol).isEqualTo(Protocol.HTTP_2)
      assertThat(it.handshake!!.tlsVersion).isEqualTo(TlsVersion.TLS_1_3)
    }
  }

    url = server.url("/")
  }

  @Test
  fun levelGetter() {
    // The default is NONE.
    assertThat(applicationInterceptor.level).isEqualTo(Level.NONE)
    for (level in Level.entries) {
      applicationInterceptor.setLevel(level)
      assertThat(applicationInterceptor.level).isEqualTo(level)
    }
  }

  @Test
  fun setLevelShouldReturnSameInstanceOfInterceptor() {
    for (level in Level.entries) {