@Test
  public void testDescribeIndex() throws Exception {
    final String serverName = "mockServer";
    final ResultCollector mockResultCollector = mock(ResultCollector.class, "ResultCollector");
    final LuceneDescribeIndexCommand command =
        spy(new LuceneTestDescribeIndexCommand(mockCache, null));

    String[] searchableFields = {"field1", "field2", "field3"};
    Map<String, Analyzer> fieldAnalyzers = new HashMap<>();
    fieldAnalyzers.put("field1", new StandardAnalyzer());
    fieldAnalyzers.put("field2", new KeywordAnalyzer());
    fieldAnalyzers.put("field3", null);
    final LuceneIndexStats mockIndexStats = getMockIndexStats(1, 10, 5, 1);
    final List<LuceneIndexDetails> indexDetails = new ArrayList<>();
    LuceneSerializer serializer = new HeterogeneousLuceneSerializer();
    indexDetails.add(createIndexDetails("memberFive", SEPARATOR + "Employees", searchableFields,
        fieldAnalyzers, mockIndexStats, LuceneIndexStatus.INITIALIZED, serverName, serializer));

    doReturn(mockResultCollector).when(command).executeFunctionOnRegion(
        any(LuceneDescribeIndexFunction.class), any(LuceneIndexInfo.class), eq(true));
    doReturn(indexDetails).when(mockResultCollector).getResult();

    ResultModel result = command.describeIndex("memberFive", SEPARATOR + "Employees");

    TabularResultModel data = result.getTableSection("lucene-indexes");
    assertThat(data.getValuesInColumn("Index Name"))
        .isEqualTo(Collections.singletonList("memberFive"));
    assertThat(data.getValuesInColumn("Region Path"))
        .isEqualTo(Collections.singletonList(SEPARATOR + "Employees"));
    assertThat(data.getValuesInColumn("Indexed Fields"))
        .isEqualTo(Collections.singletonList("[field1, field2, field3]"));
    assertThat(data.getValuesInColumn("Field Analyzer"))
        .isEqualTo(Collections.singletonList("{field1=StandardAnalyzer, field2=KeywordAnalyzer}"));
    assertThat(data.getValuesInColumn("Status"))
        .isEqualTo(Collections.singletonList("INITIALIZED"));
    assertThat(data.getValuesInColumn("Query Executions"))
        .isEqualTo(Collections.singletonList("1"));
    assertThat(data.getValuesInColumn("Commits")).isEqualTo(Collections.singletonList("10"));
    assertThat(data.getValuesInColumn("Updates")).isEqualTo(Collections.singletonList("5"));
    assertThat(data.getValuesInColumn("Documents")).isEqualTo(Collections.singletonList("1"));
  }
The LuceneIndexCommandsJUnitTest class is a test suite of test cases testing the contract and
functionality of the Lucene Index Commands.

@see LuceneCreateIndexCommand
@see LuceneDescribeIndexCommand
@see LuceneDestroyIndexCommand
@see LuceneListIndexCommand
@see LuceneSearchIndexCommand
geode-lucene/src/test/java/org/apache/geode/cache/lucene/internal/cli/commands/LuceneIndexCommandsJUnitTest.java