maven-wrapper/src/test/java/org/apache/maven/wrapper/SystemPropertiesHandlerTest.java

package org.apache.maven.wrapper;

/*
 * 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.
 */

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.equalTo;

import java.io.IOException;
import java.io.OutputStream;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

import org.junit.Before;
import org.junit.Test;

public class SystemPropertiesHandlerTest
{

  private Path tmpDir = Paths.get( "target/test-files/SystemPropertiesHandlerTest" );

  @Before
  public void setupTempDir()
    throws IOException
  {
    Files.createDirectories( tmpDir );
  }

  @Test
  public void testParsePropertiesFile()
    throws Exception
  {
    Path propFile = tmpDir.resolve( "props" );
    Properties props = new Properties();
    props.put( "a", "b" );
    props.put( "systemProp.c", "d" );
    props.put( "systemProp.", "e" );

    try ( OutputStream fos = Files.newOutputStream( propFile ) )
    {
      props.store( fos, "" );
    }

    Map<String, String> expected = new HashMap<String, String>();
    expected.put( "c", "d" );

    assertThat( SystemPropertiesHandler.getSystemProperties( propFile ), equalTo( expected ) );
  }

  @Test
  public void ifNoPropertyFileExistShouldReturnEmptyMap()
  {
    Map<String, String> expected = new HashMap<String, String>();
    assertThat( SystemPropertiesHandler.getSystemProperties( tmpDir.resolve( "unknown" ) ), equalTo( expected ) );
  }
}