src/test/java/org/apache/commons/exec/util/MapUtilTest.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
 *
 *   https://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.commons.exec.util;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;

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

import org.apache.commons.exec.environment.EnvironmentUtils;
import org.junit.jupiter.api.Test;

/**
 */
class MapUtilTest {

    /**
     * Test copying of map
     */
    @Test
    void testCopyMap() throws Exception {
        final Map<String, String> procEnvironment = new HashMap<>();
        procEnvironment.put("JAVA_HOME", "/usr/opt/java");
        final Map<String, String> result = MapUtils.copy(procEnvironment);
        assertEquals(1, result.size());
        assertEquals(1, procEnvironment.size());
        assertEquals("/usr/opt/java", result.get("JAVA_HOME"));
        result.remove("JAVA_HOME");
        assertTrue(result.isEmpty());
        assertEquals(1, procEnvironment.size());
    }

    /**
     * Test merging of maps
     */
    @Test
    void testMergeMap() throws Exception {
        final Map<String, String> procEnvironment = EnvironmentUtils.getProcEnvironment();
        final Map<String, String> applicationEnvironment = new HashMap<>();
        applicationEnvironment.put("appMainClass", "foo.bar.Main");
        final Map<String, String> result = MapUtils.merge(procEnvironment, applicationEnvironment);
        assertEquals(procEnvironment.size() + applicationEnvironment.size(), result.size());
        assertEquals("foo.bar.Main", result.get("appMainClass"));
    }

    /**
     * Test prefixing of map
     */
    @Test
    void testPrefixMap() throws Exception {
        final Map<String, String> procEnvironment = new HashMap<>();
        procEnvironment.put("JAVA_HOME", "/usr/opt/java");
        final Map<String, String> result = MapUtils.prefix(procEnvironment, "env");
        assertEquals(procEnvironment.size(), result.size());
        assertEquals("/usr/opt/java", result.get("env.JAVA_HOME"));
    }
}