hudi-client/hudi-client-common/src/test/java/org/apache/hudi/index/TestHoodieIndexUtils.java

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 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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 *   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.hudi.index;

import org.apache.hudi.common.model.HoodieFunctionalIndexDefinition;
import org.apache.hudi.common.model.HoodieFunctionalIndexMetadata;
import org.apache.hudi.common.table.HoodieTableMetaClient;
import org.apache.hudi.common.util.Option;
import org.apache.hudi.metadata.MetadataPartitionType;

import org.junit.jupiter.api.Test;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

public class TestHoodieIndexUtils {

  @Test
  public void testGetFunctionalIndexPath() {
    MetadataPartitionType partitionType = MetadataPartitionType.FUNCTIONAL_INDEX;
    HoodieTableMetaClient metaClient = mock(HoodieTableMetaClient.class);
    String indexName = "testIndex";

    Map<String, HoodieFunctionalIndexDefinition> indexDefinitions = new HashMap<>();
    indexDefinitions.put(
        indexName,
        new HoodieFunctionalIndexDefinition("func_index_testIndex", "column_stats", "lower", Collections.singletonList("name"), null));
    HoodieFunctionalIndexMetadata indexMetadata = new HoodieFunctionalIndexMetadata(indexDefinitions);
    when(metaClient.getFunctionalIndexMetadata()).thenReturn(Option.of(indexMetadata));

    String result = HoodieIndexUtils.getPartitionNameFromPartitionType(partitionType, metaClient, indexName);
    assertEquals("func_index_testIndex", result);
  }

  @Test
  public void testGetNonFunctionalIndexPath() {
    MetadataPartitionType partitionType = MetadataPartitionType.COLUMN_STATS;
    HoodieTableMetaClient metaClient = mock(HoodieTableMetaClient.class);

    String result = HoodieIndexUtils.getPartitionNameFromPartitionType(partitionType, metaClient, null);
    assertEquals(partitionType.getPartitionPath(), result);
  }

  @Test
  public void testExceptionForMissingFunctionalIndexMetadata() {
    MetadataPartitionType partitionType = MetadataPartitionType.FUNCTIONAL_INDEX;
    HoodieTableMetaClient metaClient = mock(HoodieTableMetaClient.class);
    when(metaClient.getFunctionalIndexMetadata()).thenReturn(Option.empty());

    assertThrows(IllegalArgumentException.class,
        () -> HoodieIndexUtils.getPartitionNameFromPartitionType(partitionType, metaClient, "testIndex"));
  }
}