fe/fe-core/src/test/java/org/apache/doris/analysis/MVColumnOneChildPatternTest.java

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package org.apache.doris.analysis;

import org.apache.doris.catalog.AggregateType;
import org.apache.doris.catalog.FunctionSet;

import com.google.common.collect.Lists;

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

import java.util.List;

import mockit.Expectations;
import mockit.Injectable;

public class MVColumnOneChildPatternTest {

    @Test
    public void testCorrectSum() {
        TableName tableName = new TableName("db", "table");
        SlotRef slotRef = new SlotRef(tableName, "c1");
        List<Expr> params = Lists.newArrayList();
        params.add(slotRef);
        FunctionCallExpr functionCallExpr = new FunctionCallExpr(AggregateType.SUM.name(), params);
        MVColumnOneChildPattern mvColumnOneChildPattern = new MVColumnOneChildPattern(
                AggregateType.SUM.name().toLowerCase());
        Assert.assertTrue(mvColumnOneChildPattern.match(functionCallExpr));
    }

    @Test
    public void testCorrectMin(@Injectable CastExpr castExpr) {
        TableName tableName = new TableName("db", "table");
        SlotRef slotRef = new SlotRef(tableName, "c1");
        List<Expr> child0Params = Lists.newArrayList();
        child0Params.add(slotRef);
        new Expectations() {
            {
                castExpr.unwrapSlotRef();
                result = slotRef;
            }
        };
        List<Expr> params = Lists.newArrayList();
        params.add(castExpr);
        FunctionCallExpr functionCallExpr = new FunctionCallExpr(AggregateType.MIN.name(), params);
        MVColumnOneChildPattern mvColumnOneChildPattern = new MVColumnOneChildPattern(
                AggregateType.MIN.name().toLowerCase());
        Assert.assertTrue(mvColumnOneChildPattern.match(functionCallExpr));
    }

    @Test
    public void testCorrectCountField() {
        TableName tableName = new TableName("db", "table");
        SlotRef slotRef = new SlotRef(tableName, "c1");
        List<Expr> params = Lists.newArrayList();
        params.add(slotRef);
        FunctionCallExpr functionCallExpr = new FunctionCallExpr(FunctionSet.COUNT, params);
        MVColumnOneChildPattern mvColumnOneChildPattern = new MVColumnOneChildPattern(FunctionSet.COUNT.toLowerCase());
        Assert.assertTrue(mvColumnOneChildPattern.match(functionCallExpr));
    }

    @Test
    public void testIncorrectLiteral() {
        IntLiteral intLiteral = new IntLiteral(1);
        List<Expr> params = Lists.newArrayList();
        params.add(intLiteral);
        FunctionCallExpr functionCallExpr = new FunctionCallExpr(AggregateType.SUM.name(), params);
        MVColumnOneChildPattern mvColumnOneChildPattern = new MVColumnOneChildPattern(
                AggregateType.SUM.name().toLowerCase());
        Assert.assertFalse(mvColumnOneChildPattern.match(functionCallExpr));
    }

    @Test
    public void testIncorrectArithmeticExpr() {
        TableName tableName = new TableName("db", "table");
        SlotRef slotRef1 = new SlotRef(tableName, "c1");
        SlotRef slotRef2 = new SlotRef(tableName, "c2");
        ArithmeticExpr arithmeticExpr = new ArithmeticExpr(ArithmeticExpr.Operator.ADD, slotRef1, slotRef2);
        List<Expr> params = Lists.newArrayList();
        params.add(arithmeticExpr);
        FunctionCallExpr functionCallExpr = new FunctionCallExpr(AggregateType.SUM.name(), params);
        MVColumnOneChildPattern mvColumnOneChildPattern = new MVColumnOneChildPattern(
                AggregateType.SUM.name().toLowerCase());
        Assert.assertFalse(mvColumnOneChildPattern.match(functionCallExpr));
    }
}