### Question:
PropertiesCommand implements Command { @Override public ResultState execute(Context context) { Properties properties = PropertiesUtil.loadMandatoryProperties("config", NO_PREFIX); properties = PropertiesUtil.updateMandatoryProperties(properties, "database", DATABASE_PREFIX); properties = loadPluginProperties(properties); context.bind(PROPERTIES_KEY, properties); return ResultState.success(); }  @Override ResultState execute(Context context); @Override Set<String> getAfterDependencies(); @Override Set<String> getBeforeDependencies(); @Override Set<String> getOptionalAfterDependencies(); @Override Set<String> getOptionalBeforeDependencies();  }### Answer:
@Test public void testExecute() throws IOException { byte[] targetPropertiesRaw = "plugin_hierarchicaltopic=true\n\ndatabase.NumberOfRetries=3\nplugin_wordtype=true\nDocBrowserLimit=20\nmalletNumTopics=10\ndatabase.DbUser=te_db_user\nplugins=text,hierarchicaltopic,colortopic,wordtype,fulltext\ndatabase.DbLocation=localhost:3306\ndatabase.DbPassword=te_db_password\nplugin_text=true\nplugin_fulltext=true\nplugin_colortopic=true\ndatabase.DB=te_db\nInCSVFile=/home/user/japantest/db.csv" .getBytes(); InputStream propertiesStream = new ByteArrayInputStream(targetPropertiesRaw); Properties targetProperties = new Properties(); targetProperties.load(propertiesStream); Context communicationContext = new Context(); commandUnderTest.execute(communicationContext); Properties actualProperties = (Properties) communicationContext.get(PropertiesCommand.PROPERTIES_KEY); assertThat(actualProperties).isEqualTo(targetProperties); }