flink-doris-connector/src/test/java/org/apache/doris/flink/sink/schema/SchemaChangeHelperTest.java

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package org.apache.doris.flink.sink.schema;

import com.google.common.collect.Maps;
import org.apache.doris.flink.catalog.doris.FieldSchema;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

import java.util.List;
import java.util.Map;

public class SchemaChangeHelperTest {

    private final Map<String, FieldSchema> originFieldSchemaMap = Maps.newHashMap();
    private final Map<String, FieldSchema> updateFieldSchemaMap = Maps.newHashMap();

    @Before
    public void setUp() {
        originFieldSchemaMap.put("id", new FieldSchema("id", "INT", null, ""));
        originFieldSchemaMap.put("c2", new FieldSchema("c2", "INT", null, ""));
        originFieldSchemaMap.put("c3", new FieldSchema("c3", "VARCHAR(30)", null, ""));

        updateFieldSchemaMap.put("id", new FieldSchema("id", "INT", null, ""));
        updateFieldSchemaMap.put("c2", new FieldSchema("c2", "INT", null, ""));
        updateFieldSchemaMap.put("c3", new FieldSchema("c3", "VARCHAR(30)", null, ""));
        updateFieldSchemaMap.put("c4", new FieldSchema("c4", "BIGINT", null, ""));
        updateFieldSchemaMap.put("c5", new FieldSchema("c5", "DATETIMEV2(0)", null, ""));
    }

    @Test
    public void testGenerateRenameDDLSql() {
        String table = "test.test_sink";
        String oldColumnName = "c3";
        String newColumnName = "c33";
        List<String> ddlSqls =
                SchemaChangeHelper.generateRenameDDLSql(
                        table, oldColumnName, newColumnName, originFieldSchemaMap);
        Assert.assertEquals(
                ddlSqls.get(0), "ALTER TABLE `test`.`test_sink` RENAME COLUMN `c3` `c33`");
    }

    @Test
    public void testGenerateDDLSql() {
        SchemaChangeHelper.compareSchema(updateFieldSchemaMap, originFieldSchemaMap);
        List<String> ddlSqls = SchemaChangeHelper.generateDDLSql("test.test_sink");
        Assert.assertEquals(
                ddlSqls.get(0), "ALTER TABLE `test`.`test_sink` ADD COLUMN `c4` BIGINT");
        Assert.assertEquals(
                ddlSqls.get(1), "ALTER TABLE `test`.`test_sink` ADD COLUMN `c5` DATETIMEV2(0)");
    }
}