/*
 * 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;

import io.crate.analyze.symbol.Literal;
import io.crate.types.DataTypes;
import org.junit.Test;

import static io.crate.testing.SymbolMatchers.isFunction;

public class LengthFunctionTest extends AbstractScalarFunctionsTest {

    @Test
    public void testOctetLengthEvaluateOnString() throws Exception {
        assertEvaluate("octet_length('©rate')", 6);
        assertEvaluate("octet_length('crate')", 5);
        assertEvaluate("octet_length('')", 0);
    }

    @Test
    public void testBitLengthEvaluateOnString() throws Exception {
        assertEvaluate("bit_length('©rate')", 48);
        assertEvaluate("bit_length('crate')", 40);
        assertEvaluate("bit_length('')", 0);
    }

    @Test
    public void testCharLengthEvaluateOnString() throws Exception {
        assertEvaluate("char_length('©rate')", 5);
        assertEvaluate("char_length('crate')", 5);
        assertEvaluate("char_length('')", 0);
    }

    @Test
    public void testOctetLengthEvaluateOnNull() throws Exception {
        assertEvaluate("octet_length(null)", null);
        assertEvaluate("octet_length(name)", null, Literal.of(DataTypes.STRING, null));
    }

    @Test
    public void testBitLengthEvaluateOnNull() throws Exception {
        assertEvaluate("bit_length(null)", null);
        assertEvaluate("bit_length(name)", null, Literal.of(DataTypes.STRING, null));
    }

    @Test
    public void testCharLengthEvaluateOnNull() throws Exception {
        assertEvaluate("char_length(null)", null);
        assertEvaluate("char_length(name)", null, Literal.of(DataTypes.STRING, null));
    }

    @Test
    public void testNormalizeReference() throws Exception {
        assertNormalize("bit_length(name)", isFunction("bit_length"));
        assertEvaluate("bit_length(name)", 16, Literal.of("©"));
        assertEvaluate("octet_length(name)", 2, Literal.of("©"));
        assertEvaluate("char_length(name)", 1, Literal.of("©"));
    }
}