ImmutableLongArray iia3 = ImmutableLongArray.of(5, 25, 125);

    assertThat(iia0.subArray(0, 0)).isSameInstanceAs(ImmutableLongArray.of());
    assertThat(iia1.subArray(0, 0)).isSameInstanceAs(ImmutableLongArray.of());
    assertThat(iia1.subArray(1, 1)).isSameInstanceAs(ImmutableLongArray.of());
    assertThat(iia1.subArray(0, 1).asList()).containsExactly(5L);

    ImmutableDoubleArray iia3 = ImmutableDoubleArray.of(5, 25, 125);

    assertThat(iia0.subArray(0, 0)).isSameInstanceAs(ImmutableDoubleArray.of());
    assertThat(iia1.subArray(0, 0)).isSameInstanceAs(ImmutableDoubleArray.of());
    assertThat(iia1.subArray(1, 1)).isSameInstanceAs(ImmutableDoubleArray.of());
    assertThat(iia1.subArray(0, 1).asList()).containsExactly(5.0);

    assertThat(transpose(transpose)).isSameInstanceAs(directedGraph);
    AbstractGraphTest.validateGraph(transpose);

    for (Integer node : directedGraph.nodes()) {
      assertThat(directedGraph.inDegree(node)).isSameInstanceAs(transpose.outDegree(node));
      assertThat(directedGraph.outDegree(node)).isSameInstanceAs(transpose.inDegree(node));
    }

    assertThat(caughtUee).hasCauseThat().isSameInstanceAs(uee);

    caughtUee =
        assertThrows(
            UncheckedExecutionException.class, () -> cacheUnchecked.getUnchecked(new Object()));
    assertThat(caughtUee).hasCauseThat().isSameInstanceAs(uee);

    cacheUnchecked.refresh(new Object());
    checkLoggedCause(uee);

    caughtUee =

    assertThat(expected).hasCauseThat().isSameInstanceAs(cause);
  }

  @GwtIncompatible // getCauseAs(Throwable, Class)
  public void testGetCauseAs() {
    SomeCheckedException cause = new SomeCheckedException();
    SomeChainingException thrown = new SomeChainingException(cause);

    assertThat(thrown).hasCauseThat().isSameInstanceAs(cause);

    assertThat(base32().upperCase()).isSameInstanceAs(base32());
  }

  public void testBase32LowerCase() {
    testEncodingWithCasing(base32().lowerCase(), "foobar", "mzxw6ytboi======");
  }

  public void testBase32IgnoreCase() {
    BaseEncoding ignoreCase = base32().ignoreCase();
    assertThat(ignoreCase).isNotSameInstanceAs(base32());
    assertThat(ignoreCase).isSameInstanceAs(base32().ignoreCase());

    assertThat(max(2, 1)).isEqualTo(2);
  }

  public void testMinMaxNatural_equalInstances() {
    Foo a = new Foo(1);
    Foo b = new Foo(1);
    assertThat(min(a, b)).isSameInstanceAs(a);
    assertThat(max(a, b)).isSameInstanceAs(a);
  }

  public void testMinMaxComparator() {
    Comparator<Integer> reverse = reverseOrder();
    assertThat(min(1, 2, reverse)).isEqualTo(2);

    assertThat(Primitives.wrap(int.class)).isSameInstanceAs(Integer.class);
    assertThat(Primitives.wrap(Integer.class)).isSameInstanceAs(Integer.class);
    assertThat(Primitives.wrap(String.class)).isSameInstanceAs(String.class);
  }

  public void testUnwrap() {
    assertThat(Primitives.unwrap(Integer.class)).isSameInstanceAs(int.class);
    assertThat(Primitives.unwrap(int.class)).isSameInstanceAs(int.class);

                new ClosingFunction<TestCloseable, String>() {
                  @Override
                  public String apply(DeferredCloser closer, TestCloseable v) throws Exception {
                    assertThat(v).isSameInstanceAs(closeable1);
                    return "value";
                  }
                },
                executor);
    assertThat(getFinalValue(closingFuture)).isEqualTo("value");

  }

  public void testEnsureCapacity() {
    assertThat(Chars.ensureCapacity(EMPTY, 0, 1)).isSameInstanceAs(EMPTY);
    assertThat(Chars.ensureCapacity(ARRAY1, 0, 1)).isSameInstanceAs(ARRAY1);
    assertThat(Chars.ensureCapacity(ARRAY1, 1, 1)).isSameInstanceAs(ARRAY1);
    assertThat(Chars.ensureCapacity(ARRAY1, 2, 1))
        .isEqualTo(new char[] {(char) 1, (char) 0, (char) 0});
  }