/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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.
 */

package org.apache.bookkeeper.common.conf.validators;

import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;

import java.util.function.Function;
import org.junit.Test;

/**
 * Unit test for {@link ClassValidator}.
 */
public class ClassValidatorTest {

    private static class TestFunction implements Function<String, String> {

        @Override
        public String apply(String s) {
            return s + "!";
        }
    }

    @Test
    public void testValidateStrings() {
        ClassValidator<Function> validator = ClassValidator.of(Function.class);
        assertTrue(validator.validate("test-valid-classname", TestFunction.class.getName()));
        assertFalse(validator.validate("test-invalid-classname", "unknown"));
    }

    @Test
    public void testValidateClass() {
        ClassValidator<Function> validator = ClassValidator.of(Function.class);
        assertTrue(validator.validate("test-valid-class", TestFunction.class));
        assertFalse(validator.validate("test-invalid-class", Integer.class));
    }

    @Test
    public void testValidateWrongType() {
        ClassValidator<Function> validator = ClassValidator.of(Function.class);
        assertFalse(validator.validate("test-invalid-type", 12345));
    }

}
