/*
 * Copyright 2017 MongoDB, Inc.
 *
 * Licensed 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.bson.codecs.pojo;

import org.junit.Test;

import java.util.HashMap;
import java.util.Map;

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

public final class TypeParameterMapTest {

    @Test
    public void testDefault() {
        TypeParameterMap typeParameterMap = TypeParameterMap.builder().build();
        assertTrue(typeParameterMap.getFieldToClassParamIndexMap().isEmpty());
    }

    @Test
    public void testClassParamMapsToField() {
        TypeParameterMap typeParameterMap = TypeParameterMap.builder().addIndex(1).build();
        Map<Integer, Integer> expected = new HashMap<Integer, Integer>();
        expected.put(-1, 1);
        assertEquals(expected, typeParameterMap.getFieldToClassParamIndexMap());
    }

    @Test
    public void testMapsClassAndFieldIndices() {
        TypeParameterMap typeParameterMap = TypeParameterMap.builder().addIndex(1, 2).addIndex(2, 2).build();
        Map<Integer, Integer> expected = new HashMap<Integer, Integer>();
        expected.put(1, 2);
        expected.put(2, 2);
        assertEquals(expected, typeParameterMap.getFieldToClassParamIndexMap());
    }

    @Test(expected = IllegalStateException.class)
    public void testFieldCannotBeGenericAndContainTypeParameters() {
        TypeParameterMap.builder().addIndex(1).addIndex(2, 2).build();
    }
}