### Question:
DdlVersionDirectoryTreeImpl implements DdlVersionDirectoryTree { public DdlInfoFile getDdlInfoFile() { return ddlInfoFile; } DdlVersionDirectoryTreeImpl(File baseDir, File versionFile,
            String versionNoPattern, String env); DdlVersionDirectory getCurrentVersionDirectory(); DdlVersionDirectory getNextVersionDirectory(); DdlVersionDirectory getVersionDirectory(int versionNo); DdlInfoFile getDdlInfoFile();  }### Answer:
@Test public void testGetDdlVersion() { assertNotNull(tree.getDdlInfoFile()); }