freemarker-generator-base/src/test/java/org/apache/freemarker/generator/util/MapFlattenerTest.java

/*
 * 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.freemarker.generator.util;

import org.apache.freemarker.generator.base.util.MapFlattener;
import org.junit.Test;

import java.util.Collections;
import java.util.Map;

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

public class MapFlattenerTest {

    @Test
    public void shouldHandleEmptyMap() {
        final Map<String, Object> result = MapFlattener.flatten(Collections.emptyMap());

        assertTrue(result.isEmpty());
    }

    @Test
    public void shouldPreserveFlatMap() {
        final Map<String, Object> result = MapFlattener.flatten(Collections.singletonMap("key", "value"));

        assertEquals("value", result.get("key"));
    }
}