hazelcast-master/hazelcast-sql/src/test/java/com/hazelcast/jet/sql/impl/expression/predicate/ComparisonPredicateTest.java
/*
 * Copyright 2023 Hazelcast Inc.
 *
 * Licensed under the Hazelcast Community License (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://hazelcast.com/hazelcast-community-license
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.hazelcast.jet.sql.impl.expression.predicate;

import com.hazelcast.jet.sql.SqlTestSupport;
import com.hazelcast.jet.sql.impl.JetSqlSerializerHook;
import com.hazelcast.sql.impl.expression.ConstantExpression;
import com.hazelcast.sql.impl.expression.predicate.ComparisonMode;
import com.hazelcast.sql.impl.expression.predicate.ComparisonPredicate;
import com.hazelcast.sql.impl.row.HeapRow;
import com.hazelcast.sql.impl.type.QueryDataType;
import com.hazelcast.test.HazelcastParallelClassRunner;
import com.hazelcast.test.annotation.ParallelJVMTest;
import com.hazelcast.test.annotation.QuickTest;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;

import static com.hazelcast.sql.impl.expression.predicate.ComparisonMode.EQUALS;
import static com.hazelcast.sql.impl.expression.predicate.ComparisonMode.GREATER_THAN;
import static com.hazelcast.sql.impl.expression.predicate.ComparisonMode.LESS_THAN;
import static com.hazelcast.sql.impl.type.QueryDataType.BIGINT;
import static com.hazelcast.sql.impl.type.QueryDataType.INT;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

@RunWith(HazelcastParallelClassRunner.class)
@Category({QuickTest.class, ParallelJVMTest.class})
public class ComparisonPredicateTest extends SqlTestSupport {

    @SuppressWarnings("ConstantConditions")
    @Test
    public void testCreationAndEval() {
        assertFalse(comparison(0, 1, INT, EQUALS).eval(heapRow("foo"), createExpressionEvalContext()));
        assertTrue(comparison(0, 1, INT, LESS_THAN).eval(heapRow("foo"), createExpressionEvalContext()));
    }

    @Test
    public void testEquality() {
        checkEquals(comparison(0, 1, INT, EQUALS), comparison(0, 1, INT, EQUALS), true);
        checkEquals(comparison(0, 1, INT, EQUALS), comparison(0, 1, INT, GREATER_THAN), false);
        checkEquals(comparison(0, 1, INT, EQUALS), comparison(0, 1, BIGINT, EQUALS), false);
        checkEquals(comparison(0, 1, INT, EQUALS), comparison(1, 1, INT, EQUALS), false);
        checkEquals(comparison(0, 1, INT, EQUALS), comparison(1, 0, INT, EQUALS), false);
    }

    @Test
    public void testSerialization() {
        ComparisonPredicate original = comparison(0, 1, INT, EQUALS);
        ComparisonPredicate restored = serializeAndCheck(original, JetSqlSerializerHook.EXPRESSION_COMPARISON);

        checkEquals(original, restored, true);
    }

    private static com.hazelcast.sql.impl.row.Row heapRow(Object... values) {
        assertNotNull(values);
        assertTrue(values.length > 0);

        return new HeapRow(values);
    }

    private static ComparisonPredicate comparison(Object lhs, Object rhs, QueryDataType type, ComparisonMode mode) {
        return ComparisonPredicate.create(ConstantExpression.create(lhs, type), ConstantExpression.create(rhs, type), mode);
    }
}
