fe/fe-core/src/test/java/org/apache/doris/qe/ShowResultSetMetaDataTest.java

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package org.apache.doris.qe;

import org.apache.doris.catalog.Column;
import org.apache.doris.catalog.ScalarType;
import org.apache.doris.catalog.PrimitiveType;

import org.junit.Assert;
import org.junit.Test;

public class ShowResultSetMetaDataTest {
    @Test
    public void testNormal() {
        ShowResultSetMetaData metaData = ShowResultSetMetaData.builder().build();
        Assert.assertEquals(0, metaData.getColumnCount());

        metaData = ShowResultSetMetaData.builder()
                .addColumn(new Column("col1", ScalarType.createType(PrimitiveType.INT)))
                .addColumn(new Column("col2", ScalarType.createType(PrimitiveType.INT)))
                .build();

        Assert.assertEquals(2, metaData.getColumnCount());
        Assert.assertEquals("col1", metaData.getColumn(0).getName());
        Assert.assertEquals("col2", metaData.getColumn(1).getName());
    }

    @Test(expected = IndexOutOfBoundsException.class)
    public void testOutBound() {
        ShowResultSetMetaData metaData = ShowResultSetMetaData.builder().build();
        metaData.getColumn(1);
        Assert.fail("No exception throws.");
    }
}