/*
 * Licensed to Crate under one or more contributor license agreements.
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.  Crate licenses this file
 * to you under the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.  You may
 * obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied.  See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * However, if you have executed another commercial license agreement
 * with Crate these terms will supersede the license and you may use the
 * software solely pursuant to the terms of the relevant commercial
 * agreement.
 */

package io.crate.operation.scalar.arithmetic;

import io.crate.operation.scalar.AbstractScalarFunctionsTest;
import org.junit.Test;

public class PowerFunctionTest extends AbstractScalarFunctionsTest {

    @Test
    public void testPowerWithIntegers() {
        assertEvaluate("power(2,4)", 16.0);
    }

    @Test
    public void testPowerWithDecimalTypes() {
        assertEvaluate("power(2.0,4.0)", 16.0);
    }

    @Test
    public void testNegativeExponent() {
        assertEvaluate("power(2,-3)", 0.125);
    }

    @Test
    public void testNegativeDecimalTypeExponent() {
        assertEvaluate("power(2,-3.0)", 0.125);
    }

    @Test
    public void testNegativeBaseWithPositiveExponent() {
        assertEvaluate("power(-2,3)", -8.0);
    }

    @Test
    public void testNegativeBaseAndExponent() {
        assertEvaluate("power(-2,-3)", -0.125);
    }

    @Test
    public void testNegativeBaseAndExponentDecimalType() {
        assertEvaluate("power(-2.0,-3.0)", -0.125);
    }

    @Test
    public void testInvalidNumberOfArguments() {
        expectedException.expectMessage("unknown function: power(long)");
        assertEvaluate("power(2)", null);
    }
}