* of throwable.
   */
  public void callAndAssertThrows(
      Class<? extends Throwable> expected, String methodName, Object... arguments)
      throws Exception {
    checkNotNull(expected);
    checkNotNull(methodName);
    checkNotNull(arguments);
    sendRequest(methodName, arguments);
    assertEquals(expected, getResponse(methodName).getThrowable().getClass());
  }

  /**

      fail();
    } catch (NullPointerException expected) {
    }

    try {
      ImmutableSortedMap.of("one", 1, null, 2);
      fail();
    } catch (NullPointerException expected) {
    }
  }

  public void testOfNullValue() {
    try {
      ImmutableSortedMap.of("one", null);
      fail();
    } catch (NullPointerException expected) {
    }

    try {

              });
      fail("Expected NullPointerException or UnsupportedOperationException");
    } catch (NullPointerException | UnsupportedOperationException expected) {
    }
  }

  public void testMergeNullFunction() {
    try {
      getMap().merge(k0(), v3(), null);
      fail("Expected NullPointerException or UnsupportedOperationException");

  protected final void expectReplacement(Entry<K, V> newEntry) {
    List<Entry<K, V>> expected = Helpers.copyToList(getSampleElements());
    replaceValue(expected, newEntry);
    expectContents(expected);
  }

  private void replaceValue(List<Entry<K, V>> expected, Entry<K, V> newEntry) {
    for (ListIterator<Entry<K, V>> i = expected.listIterator(); i.hasNext(); ) {
      if (Helpers.equal(i.next().getKey(), newEntry.getKey())) {

  }

  private static void checkSha1(String expected, byte[] key, String data) {
    checkSha1(expected, key, data.getBytes(UTF_8));
  }

  private static void checkSha1(String expected, byte[] key, byte[] data) {
    checkHmac(expected, Hashing.hmacSha1(key), data);
  }

  private static void checkMd5(String expected, byte[] key, String data) {
    checkMd5(expected, key, data.getBytes(UTF_8));
  }

    try {
      base64().withSeparator("=", 3);
      fail("Expected IllegalArgumentException");
    } catch (IllegalArgumentException expected) {
    }

    try {
      base64().withPadChar('#').withSeparator("!#!", 3);
      fail("Expected IllegalArgumentException");
    } catch (IllegalArgumentException expected) {
    }
  }

  public void testAtMostOneSeparator() {

      fail();
    } catch (ExecutionException expected) {
      assertThat(expected).hasCauseThat().isEqualTo(failureCause);
    }
  }

  public void testCancelled() throws ExecutionException {
    try {
      getDone(immediateCancelledFuture());
      fail();
    } catch (CancellationException expected) {
    }
  }

  public void testPending() throws ExecutionException {
    try {

    try {
      Iterator<Entry<K, V>> iterator = getMap().entrySet().iterator();
      putAll(MinimalCollection.of(e3(), e0()));
      iterator.next();
      fail("Expected ConcurrentModificationException");
    } catch (ConcurrentModificationException expected) {
      // success
    }
  }

  @MapFeature.Require(absent = SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)

    ExecutionError expected = assertThrows(ExecutionError.class, () -> cache.get(new Object()));
    assertThat(expected).hasCauseThat().isSameInstanceAs(e);
    stats = cache.stats();
    assertEquals(1, stats.missCount());
    assertEquals(0, stats.loadSuccessCount());
    assertEquals(1, stats.loadExceptionCount());
    assertEquals(0, stats.hitCount());

      }
      assertEquivalent(expectedResult, collector.finisher().apply(finalAccum));
    }
  }

  private void assertEquivalent(R expected, R actual) {
    assertTrue(
        "Expected " + expected + " got " + actual + " modulo equivalence " + equivalence,
        equivalence.test(expected, actual));
  }