ExtractData data = new ExtractData();
        assertNotNull(data);
        assertNull(data.getContent());
        assertNotNull(data.getKeySet());
        assertTrue(data.getKeySet().isEmpty());
    }

    public void test_constructorWithContent() {
        // Test constructor with content
        String content = "Test content";
        ExtractData data = new ExtractData(content);

        Thread[] threads = new Thread[threadNum];
        ESSourceReader reader = new ESSourceReader(client, settings, indexName);
        reader.setScrollSize(100);
        for (int i = 0; i < threadNum; i++) {
            threads[i] = new Thread(() -> {
                Map<String, Object> source;
                while ((source = reader.read()) != null) {

                try {
                    return new java.util.Date(Long.parseLong(s));
                } catch (NumberFormatException e) {
                    throw new XmlPullParserException(e.getMessage(), parser, e);
                }
            } else {
                try {
                    DateFormat dateParser = new java.text.SimpleDateFormat(effectiveDateFormat, java.util.Locale.US);

                }
              }
              return true;
            };
    TypeWithDuplicates a = new TypeWithDuplicates(1, 1);
    TypeWithDuplicates b1 = new TypeWithDuplicates(2, 1);
    TypeWithDuplicates b2 = new TypeWithDuplicates(2, 2);
    TypeWithDuplicates c = new TypeWithDuplicates(3, 1);
    CollectorTester.of(collector, equivalence)
        .expectCollects(

        final Pattern parsePattern = Pattern.compile("(.*?)\\s*+=>\\s*+(.*?)\\s*+$");
        final List<CharMappingItem> itemList = new ArrayList<>();
        try (BufferedReader reader = new BufferedReader(new InputStreamReader(in, Constants.UTF_8))) {
            long id = 0;
            String line = null;
            while ((line = reader.readLine()) != null) {

    int i = 0;
    for (Entry<E> entry : entries) {
      elementsBuilder.add(entry.getElement());
      cumulativeCounts[i + 1] = cumulativeCounts[i] + entry.getCount();
      i++;
    }
    return new RegularImmutableSortedMultiset<>(
        new RegularImmutableSortedSet<E>(elementsBuilder.build(), comparator),
        cumulativeCounts,
        0,
        entries.size());
  }

        DefaultProxySelector proxySelector = new DefaultProxySelector();
        for (Proxy proxy : request.getProxies()) {
            AuthenticationBuilder authBuilder = new AuthenticationBuilder();
            authBuilder.addUsername(proxy.getUsername()).addPassword(proxy.getPassword());
            proxySelector.add(
                    new org.eclipse.aether.repository.Proxy(

        when(mockConfig.getOemEncoding()).thenReturn("windows-1252");
        cmd = new SmbComQueryInformation(mockConfig, "testfile.txt");
    }

    @Test
    @DisplayName("writeBytesWireFormat writes the command byte followed by the null terminated string")
    void testWriteBytesWireFormatHappy() throws UnsupportedEncodingException {
        byte[] buffer = new byte[50];
        int used = cmd.writeBytesWireFormat(buffer, 0);

        NetShareEnumResponse response = new NetShareEnumResponse();

        // Manually set parameters that would be read by readParametersWireFormat
        response.numEntries = 2;
        byte[] params = { 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x02, 0x00 };
        response.readParametersWireFormat(params, 0, params.length);

        // Data block: 2 entries
        byte[] data = new byte[100];

     */
    map.put(Integer.class, new Integer(5));
    assertThrows(ClassCastException.class, () -> map.put(Double.class, new Long(42)));
    // Won't compile: map.put(String.class, "x");
  }

  public void testPutAndGetInstance() {
    assertThat(map.putInstance(Integer.class, new Integer(5))).isNull();

    Integer oldValue = map.putInstance(Integer.class, new Integer(7));
    assertEquals(5, (int) oldValue);