SIL.CoreImpl.SpellingHelper.EnsureDictionary C# (CSharp) Method

		public static ISpellEngine EnsureDictionary(int ws, ILgWritingSystemFactory wsf)
		{
			string dictId = RawDictionaryId(ws, wsf);
			if (dictId == null)
				return null; // No Dictionary ID set. Caller has probably messed up, but we can't fix it here.
			EnsureDictionary(dictId);
			// Now it should exist!
			return GetSpellChecker(dictId);
		}

        public void EnsureDictionaryDoesNotOverwriteNonVernacularDictionary()
        {
            const string dictId   = "nonvern";
            const string testWord = "testWord";

            Directory.CreateDirectory(SpellingHelper.GetSpellingDirectoryPath());
            var filePath = SpellingHelper.GetDicPath(SpellingHelper.GetSpellingDirectoryPath(), dictId);

            // Wipe out any files related to our fake test dictionary
            File.Delete(SpellingHelper.GetExceptionFileName(filePath));
            File.Delete(filePath);
            File.Delete(Path.ChangeExtension(filePath, ".aff"));

            //build new fake test dictionary that is not vernacular
            var nonverndict = @"10" + Environment.NewLine + testWord + Environment.NewLine;
            var nonvernaff  = @"SET UTF-8" + Environment.NewLine + "KEEPCASE C" + Environment.NewLine;

            File.WriteAllText(filePath, nonverndict);
            File.WriteAllText(Path.ChangeExtension(filePath, ".aff"), nonvernaff);
            //SUT
            SpellingHelper.EnsureDictionary(dictId);
            //read back the hopefully unaffected dictionary
            var contents = File.ReadAllText(filePath);

            Assert.That(contents, Is.Not.StringContaining(SpellingHelper.PrototypeWord));
            Assert.That(contents, Contains.Substring(testWord));
        }