public void Import_OriginalConceptsDoc_ProducesListOfConcepts()
        {
            var cdi     = new ConceptsDocImporter();
            var results = cdi.ImportOriginalConceptsDoc();

            Assert.Equal(ImportResult.Complete, results.importResult);
        }
        public void CreateExerciseFile_FromOriginalConceptsDoc_ProducesValidTree()
        {
            var    cdi          = new ConceptsDocImporter();
            var    tnci         = new TrackNeutralConceptsImporter();
            var    efc          = new ExerciseFileWriter(cdi, tnci);
            var    exerciseFile = efc.CreateExerciseFileFromConceptsDoc();
            var    efh          = new ExerciseJsonParser();
            string result       = efh.ToString(exerciseFile);

            Assert.NotNull(exerciseFile);
        }