code: /*
   * Copyright (c) 2022 Airbyte, Inc., all rights reserved.
   */
  
  package io.airbyte.integrations.source.mssql;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import com.fasterxml.jackson.databind.JsonNode;
  import io.airbyte.commons.json.Jsons;
  import io.airbyte.integrations.source.mssql.MssqlCdcHelper.DataToSync;
  import io.airbyte.integrations.source.mssql.MssqlCdcHelper.SnapshotIsolation;
  import java.util.Map;
  import org.junit.jupiter.api.Test;
  
  class MssqlCdcHelperTest {
  
    private static final JsonNode LEGACY_NON_CDC_CONFIG = Jsons.jsonNode(Map.of("replication_method", "STANDARD"));
    private static final JsonNode LEGACY_CDC_CONFIG = Jsons.jsonNode(Map.of("replication_method", "CDC"));
  
    @Test
    public void testIsCdc() {
      // legacy replication method config before version 0.4.0
      assertFalse(MssqlCdcHelper.isCdc(LEGACY_NON_CDC_CONFIG));
      assertTrue(MssqlCdcHelper.isCdc(LEGACY_CDC_CONFIG));
  
      // new replication method config since version 0.4.0
      final JsonNode newNonCdc = Jsons.jsonNode(Map.of("replication",
          Jsons.jsonNode(Map.of("replication_type", "STANDARD"))));
      assertFalse(MssqlCdcHelper.isCdc(newNonCdc));
  
      final JsonNode newCdc = Jsons.jsonNode(Map.of("replication",
          Jsons.jsonNode(Map.of(
              "replication_type", "CDC",
              "data_to_sync", "Existing and New",
              "snapshot_isolation", "Snapshot"))));
      assertTrue(MssqlCdcHelper.isCdc(newCdc));
  
      // migration from legacy to new config
      final JsonNode mixNonCdc = Jsons.jsonNode(Map.of(
          "replication_method", "CDC",
          "replication", Jsons.jsonNode(Map.of("replication_type", "STANDARD"))));
      assertFalse(MssqlCdcHelper.isCdc(mixNonCdc));
  
      final JsonNode mixCdc = Jsons.jsonNode(Map.of(
          "replication_method", "Standard",
          "replication", Jsons.jsonNode(Map.of(
              "replication_type", "CDC",
              "data_to_sync", "Existing and New",
              "snapshot_isolation", "Snapshot"))));
      assertTrue(MssqlCdcHelper.isCdc(mixCdc));
    }
  
    @Test
    public void testGetSnapshotIsolation() {
      // legacy replication method config before version 0.4.0
      assertEquals(SnapshotIsolation.SNAPSHOT, MssqlCdcHelper.getSnapshotIsolationConfig(LEGACY_CDC_CONFIG));
  
      // new replication method config since version 0.4.0
      final JsonNode newCdcNonSnapshot = Jsons.jsonNode(Map.of("replication",
          Jsons.jsonNode(Map.of(
              "replication_type", "CDC",
              "data_to_sync", "Existing and New",
              "snapshot_isolation", "Read Committed"))));
      assertEquals(SnapshotIsolation.READ_COMMITTED, MssqlCdcHelper.getSnapshotIsolationConfig(newCdcNonSnapshot));
  
      final JsonNode newCdcSnapshot = Jsons.jsonNode(Map.of("replication",
          Jsons.jsonNode(Map.of(
              "replication_type", "CDC",
              "data_to_sync", "Existing and New",
              "snapshot_isolation", "Snapshot"))));
      assertEquals(SnapshotIsolation.SNAPSHOT, MssqlCdcHelper.getSnapshotIsolationConfig(newCdcSnapshot));
  
      // migration from legacy to new config
      final JsonNode mixCdcNonSnapshot = Jsons.jsonNode(Map.of(
          "replication_method", "Standard",
          "replication", Jsons.jsonNode(Map.of(
              "replication_type", "CDC",
              "data_to_sync", "Existing and New",
              "snapshot_isolation", "Read Committed"))));
      assertEquals(SnapshotIsolation.READ_COMMITTED, MssqlCdcHelper.getSnapshotIsolationConfig(mixCdcNonSnapshot));
  
      final JsonNode mixCdcSnapshot = Jsons.jsonNode(Map.of(
          "replication_method", "Standard",
          "replication", Jsons.jsonNode(Map.of(
              "replication_type", "CDC",
              "data_to_sync", "Existing and New",
              "snapshot_isolation", "Snapshot"))));
      assertEquals(SnapshotIsolation.SNAPSHOT, MssqlCdcHelper.getSnapshotIsolationConfig(mixCdcSnapshot));
    }
  
    @Test
    public void testGetDataToSyncConfig() {
      // legacy replication method config before version 0.4.0
      assertEquals(DataToSync.EXISTING_AND_NEW, MssqlCdcHelper.getDataToSyncConfig(LEGACY_CDC_CONFIG));
  
      // new replication method config since version 0.4.0
      final JsonNode newCdcExistingAndNew = Jsons.jsonNode(Map.of("replication",
          Jsons.jsonNode(Map.of(
              "replication_type", "CDC",
              "data_to_sync", "Existing and New",
              "snapshot_isolation", "Read Committed"))));
      assertEquals(DataToSync.EXISTING_AND_NEW, MssqlCdcHelper.getDataToSyncConfig(newCdcExistingAndNew));
  
      final JsonNode newCdcNewOnly = Jsons.jsonNode(Map.of("replication",
          Jsons.jsonNode(Map.of(
              "replication_type", "CDC",
              "data_to_sync", "New Changes Only",
              "snapshot_isolation", "Snapshot"))));
      assertEquals(DataToSync.NEW_CHANGES_ONLY, MssqlCdcHelper.getDataToSyncConfig(newCdcNewOnly));
  
      final JsonNode mixCdcExistingAndNew = Jsons.jsonNode(Map.of(
          "replication_method", "Standard",
          "replication", Jsons.jsonNode(Map.of(
              "replication_type", "CDC",
              "data_to_sync", "Existing and New",
              "snapshot_isolation", "Read Committed"))));
      assertEquals(DataToSync.EXISTING_AND_NEW, MssqlCdcHelper.getDataToSyncConfig(mixCdcExistingAndNew));
  
      final JsonNode mixCdcNewOnly = Jsons.jsonNode(Map.of(
          "replication_method", "Standard",
          "replication",
          Jsons.jsonNode(Map.of(
              "replication_type", "CDC",
              "data_to_sync", "New Changes Only",
              "snapshot_isolation", "Snapshot"))));
      assertEquals(DataToSync.NEW_CHANGES_ONLY, MssqlCdcHelper.getDataToSyncConfig(mixCdcNewOnly));
    }
  
  }
  