new_contents: from sequana import sequana_data
  from sequana.designexp import ExpDesignHiSeq, ExpDesignMiSeq
  
  
  def test_designHiSeq():
      tt = ExpDesignHiSeq(sequana_data("test_expdesign_hiseq.csv", "testing"))
      assert list(tt.df['Index Seq'].values)  == ['TTAGGC', 'GATCAG', 
          'ACTTGA', 'TAGCTT', 'ACTTGA']
  
  
  def test_designMiSeq():
      tt = ExpDesignMiSeq(sequana_data("test_expdesign_miseq_illumina.csv", "testing"))
      tt.df.I7_Index_ID[0] == "NF01"
  
subject: add test for expdesig