List<String> listWithNulls = Arrays.asList("a", null, "b", null, "c");
        doc.put("key", listWithNulls);

        String[] result = DocumentUtil.getValue(doc, "key", String[].class);
        assertArrayEquals(new String[] { "a", "b", "c" }, result);
    }

    public void test_empty_list() {
        Map<String, Object> doc = new HashMap<>();
        doc.put("key", new ArrayList<>());

        // No matching host header
        HtmlNext result = virtualHostHelper.getVirtualHostPath(page);
        assertEquals("/search", result.getRoutingPath());

        // Matching host header
        request.addHeader("Host", "example.com");
        result = virtualHostHelper.getVirtualHostPath(page);
        assertEquals("/site1/search", result.getRoutingPath());

        StringBuilder result = new StringBuilder();
        switch (errorClass) {
        case SUCCESS:
            result.append("SUCCESS");
            break;
        case ERR_NAM_SRVC:
            result.append("ERR_NAM_SRVC/");
            switch (errorCode) {
            case FMT_ERR:
                result.append("FMT_ERR: Format Error");
            default:

    assertThat(result).asList().containsExactly("a", "b").inOrder();
  }

  @GwtIncompatible // ObjectArrays.concat(Object[], Object[], Class)
  public void testConcatNonemptyEmpty() {
    String[] result = ObjectArrays.concat(new String[] {"a", "b"}, new String[0], String.class);
    assertEquals(String[].class, result.getClass());
    assertThat(result).asList().containsExactly("a", "b").inOrder();

    }

    @Test
    @DisplayName("Test successful calls in CLOSED state")
    void testSuccessfulCalls() throws Exception {
        String result = circuitBreaker.call(() -> "success");
        assertEquals("success", result);
        assertEquals(SimpleCircuitBreaker.State.CLOSED, circuitBreaker.getState());

        SimpleCircuitBreaker.Statistics stats = circuitBreaker.getStatistics();

  // Avoid Long.hashCode(long) which isn't available on Android 5.
  override fun hashCode(): Int {
    var result = 0
    result = 31 * result + tagClass
    result = 31 * result + tag.toInt()
    result = 31 * result + (if (constructed) 0 else 1)
    result = 31 * result + length.toInt()
    result = 31 * result + bytes.hashCode()
    return result
  }

  @Override
  public Set<K> keySet() {
    Set<K> result = keySet;
    return (result == null) ? keySet = createKeySet() : result;
  }

  abstract Set<K> createKeySet();

  @LazyInit private transient @Nullable Multiset<K> keys;

  @Override
  public Multiset<K> keys() {
    Multiset<K> result = keys;
    return (result == null) ? keys = createKeys() : result;
  }

  abstract Multiset<K> createKeys();

    assert n1 <= n2;
    if (IntMath.log2(n2, CEILING) * (n2 - n1) < Long.SIZE - 1) {
      // the result will definitely fit into a long
      long result = 1;
      for (int i = n1 + 1; i <= n2; i++) {
        result *= i;
      }
      return BigInteger.valueOf(result);
    }

    /*
     * We want each multiplication to have both sides with approximately the same number of digits.

    }

    @Override
    public void merge(File current, File result) throws RepositoryException {
        try {
            if (current.exists()) {
                Files.createDirectories(result.toPath().getParent());
                Files.copy(current.toPath(), result.toPath());
            }
            ArtifactRepository localRepo = new MetadataRepository(result);
            metadata.storeInLocalRepository(localRepo, localRepo);

    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((first == null) ? 0 : first.hashCode());
        result = prime * result + ((second == null) ? 0 : second.hashCode());
        return result;
    }

    @Override
    public boolean equals(final Object obj) {
        if (this == obj) {