### Question:
LauncherConfiguration implements LauncherOptions { @Override public String toString() { StringBuilder builder = new StringBuilder(); builder.append("LauncherConfiguration [selionConfig="); builder.append(selionConfig); builder.append(", downloadCleanup="); builder.append(downloadCleanup); builder.append(", downloadTimeStampCheck="); builder.append(downloadTimeStampCheck); builder.append("]"); return builder.toString(); }  boolean isFileDownloadCleanupOnInvocation(); T setFileDownloadCleanupOnInvocation(boolean val); boolean isFileDownloadCheckTimeStampOnInvocation(); T setFileDownloadCheckTimeStampOnInvocation(boolean val); String getSeLionConfig(); T setSeLionConfig(String config); void merge(LauncherOptions other); @Override String toString(); JsonElement toJson(); LauncherConfiguration fromJson(JsonElement json); LauncherConfiguration fromJson(String json); static LauncherConfiguration loadFromFile(String configFile); static final String SELION_CONFIG; static final String SELION_CONFIG_ARG; static final String DOWNLOAD_CLEANUP; static final String DOWNLOAD_CLEANUP_ARG; static final String DOWNLOAD_TIMESTAMP_CHECK; static final String DOWNLOAD_TIMESTAMP_CHECK_ARG; }### Answer:
@Test public void testToString() { LauncherConfiguration lc = new LauncherConfiguration(); assertNotNull(lc.toString()); assertTrue(lc.toString().contains("downloadTimeStampCheck=true")); }