code_ruby/test/maasha/test_seq.rb

   1 #!/usr/bin/env ruby
   2
   3 require 'maasha/seq'
   4 require 'test/unit'
   5 require 'pp'
   6
   7 class TestSeq < Test::Unit::TestCase
   8   def setup
   9     @entry = Seq.new
  10   end
  11
  12   #  def test_Seq# autoremoves whitespace, newlines, and carriage returns
  13   #    dna = Seq.new
  14   #    dna.seq = "A\tT\r\tC\nG  "
  15   #    assert_equal(dna.seq, "ATCG")
  16   #  end
  17
  18   def test_Seq_new_bp_returns_correctly
  19     record = {:SEQ_NAME => "test", :SEQ => "ATCG", :SEQ_TYPE => "dna", :SCORES => "hhhh"}
  20     seq    = Seq.new_bp(record)
  21     assert_equal("test", seq.seq_name)
  22     assert_equal("ATCG", seq.seq)
  23     assert_equal("dna",  seq.type)
  24     assert_equal("hhhh", seq.qual)
  25   end
  26
  27   def test_Seq_is_dna_with_no_sequence_type_returns_false
  28     assert(@entry.is_dna? == false)
  29   end
  30
  31   def test_Seq_is_dna_with_dna_sequence_type_returns_true
  32     @entry.type = 'dna'
  33     assert(@entry.is_dna? == true)
  34   end
  35
  36   def test_Seq_is_rna_with_no_sequence_type_returns_false
  37     assert(@entry.is_rna? == false)
  38   end
  39
  40   def test_Seq_is_rna_with_rna_sequence_type_returns_true
  41     @entry.type = 'rna'
  42     assert(@entry.is_rna? == true)
  43   end
  44
  45   def test_Seq_is_protein_with_no_sequence_type_returns_false
  46     assert(@entry.is_protein? == false)
  47   end
  48
  49   def test_Seq_is_protein_with_protein_sequence_type_returns_true
  50     @entry.type = 'protein'
  51     assert_equal(true, @entry.is_protein?)
  52   end
  53
  54   def test_Seq_type_guess_without_sequence_raises
  55     assert_raise(SeqError) { @entry.type_guess }
  56   end
  57
  58   def test_Seq_type_guess_with_protein_returns_protein
  59     @entry.seq = 'atcatcrFgatcg'
  60     assert_equal('protein', @entry.type_guess)
  61   end
  62
  63   def test_Seq_type_guess_with_rna_returns_rna
  64     @entry.seq = 'atcatcrUgatcg'
  65     assert_equal('rna', @entry.type_guess)
  66   end
  67
  68   def test_Seq_type_guess_with_dna_returns_dna
  69     @entry.seq = 'atcatcgatcg'
  70     assert_equal('dna', @entry.type_guess)
  71   end
  72
  73   def test_Seq_type_guess_EM_without_sequence_raises
  74     assert_raise(SeqError) { @entry.type_guess! }
  75   end
  76
  77   def test_Seq_type_guess_EM_with_protein_returns_protein
  78     @entry.seq = 'atcatcrFgatcg'
  79     @entry.type_guess!
  80     assert_equal('protein', @entry.type)
  81   end
  82
  83   def test_Seq_type_guess_EM_with_rna_returns_rna
  84     @entry.seq = 'atcatcrUgatcg'
  85     @entry.type_guess!
  86     assert_equal('rna', @entry.type)
  87   end
  88
  89   def test_Seq_type_guess_EM_with_dna_returns_dna
  90     @entry.seq = 'atcatcgatcg'
  91     @entry.type_guess!
  92     assert_equal('dna', @entry.type)
  93   end
  94
  95   def test_Seq_length_is_correct
  96     @entry.seq = 'ATCG'
  97     assert_equal(4, @entry.length)
  98   end
  99
 100   def test_Seq_indels_is_correct
 101     @entry.seq = 'ATCG.-~_'
 102     assert_equal(4, @entry.indels)
 103   end
 104
 105   def test_Seq_to_rna_raises_if_no_sequence
 106     @entry.type = 'dna'
 107     assert_raise(SeqError) { @entry.to_rna }
 108   end
 109
 110   def test_Seq_to_rna_raises_on_bad_type
 111     @entry.seq  = 'ATCG'
 112     @entry.type = 'rna'
 113     assert_raise(SeqError) { @entry.to_rna }
 114   end
 115
 116   def test_Seq_to_rna_transcribes_correctly
 117     @entry.seq  = 'ATCGatcg'
 118     @entry.type = 'dna'
 119     assert_equal("AUCGaucg", @entry.to_rna)
 120   end
 121
 122   def test_Seq_to_rna_changes_entry_type_to_rna
 123     @entry.seq  = 'ATCGatcg'
 124     @entry.type = 'dna'
 125     @entry.to_rna
 126     assert_equal("rna", @entry.type)
 127   end
 128
 129   def test_Seq_to_dna_raises_if_no_sequence
 130     @entry.type = 'rna'
 131     assert_raise(SeqError) { @entry.to_dna }
 132   end
 133
 134   def test_Seq_to_dna_raises_on_bad_type
 135     @entry.seq  = 'AUCG'
 136     @entry.type = 'dna'
 137     assert_raise(SeqError) { @entry.to_dna }
 138   end
 139
 140   def test_Seq_to_dna_transcribes_correctly
 141     @entry.seq  = 'AUCGaucg'
 142     @entry.type = 'rna'
 143     assert_equal("ATCGatcg", @entry.to_dna)
 144   end
 145
 146   def test_Seq_to_dna_changes_entry_type_to_dna
 147     @entry.seq  = 'AUCGaucg'
 148     @entry.type = 'rna'
 149     @entry.to_dna
 150     assert_equal("dna", @entry.type)
 151   end
 152
 153   def test_Seq_to_bp_returns_correct_record
 154     @entry.seq_name = 'test'
 155     @entry.seq      = 'ATCG'
 156     assert_equal({:SEQ_NAME=>"test", :SEQ=>"ATCG", :SEQ_LEN=>4}, @entry.to_bp)
 157   end
 158
 159   def test_Seq_to_bp_raises_on_missing_seq_name
 160     @entry.seq = 'ATCG'
 161     assert_raise(SeqError) { @entry.to_bp }
 162   end
 163
 164   def test_Seq_to_bp_raises_on_missing_sequence
 165     @entry.seq_name = 'test'
 166     assert_raise(SeqError) { @entry.to_bp }
 167   end
 168
 169   def test_Seq_to_fasta_returns_correct_entry
 170     @entry.seq_name = 'test'
 171     @entry.seq      = 'ATCG'
 172     assert_equal(">test\nATCG\n", @entry.to_fasta)
 173   end
 174
 175   def test_Seq_to_fasta_wraps_correctly
 176     entry = Seq.new("test", "ATCG")
 177     assert_equal(">test\nAT\nCG\n", entry.to_fasta(2))
 178   end
 179
 180   def test_Seq_to_fastq_returns_correct_entry
 181     @entry.seq_name = 'test'
 182     @entry.seq      = 'ATCG'
 183     @entry.qual     = 'hhhh'
 184     assert_equal("@test\nATCG\n+\nhhhh\n", @entry.to_fastq)
 185   end
 186
 187   def test_Seq_to_key_with_bad_residue_raises
 188     entry = Seq.new("test", "AUCG")
 189     assert_raise(SeqError) { entry.to_key }
 190   end
 191
 192   def test_Seq_to_key_returns_correctly
 193     entry = Seq.new("test", "ATCG")
 194     assert_equal(54, entry.to_key)
 195   end
 196
 197   def test_Seq_reverse_returns_correctly
 198     @entry.seq = "ATCG"
 199     assert_equal("GCTA", @entry.reverse.seq)
 200   end
 201
 202   def test_Seq_complement_raises_if_no_sequence
 203     @entry.type = 'dna'
 204     assert_raise(SeqError) { @entry.complement }
 205   end
 206
 207   def test_Seq_complement_raises_on_bad_type
 208     @entry.seq  = 'ATCG'
 209     @entry.type = 'protein'
 210     assert_raise(SeqError) { @entry.complement }
 211   end
 212
 213   def test_Seq_complement_for_DNA_is_correct
 214     @entry.seq  = 'ATCGatcg'
 215     @entry.type = 'dna'
 216     assert_equal("TAGCtagc", @entry.complement)
 217   end
 218
 219   def test_Seq_complement_for_RNA_is_correct
 220     @entry.seq  = 'AUCGaucg'
 221     @entry.type = 'rna'
 222     assert_equal("UAGCuagc", @entry.complement)
 223   end
 224
 225   def test_Seq_reverse_complement_for_DNA_is_correct
 226     @entry.seq  = 'ATCGatcg'
 227     @entry.type = 'dna'
 228     assert_equal("cgatCGAT", @entry.reverse_complement.seq)
 229   end
 230
 231   def test_Seq_reverse_complement_for_RNA_is_correct
 232     @entry.seq  = 'AUCGaucg'
 233     @entry.type = 'rna'
 234     assert_equal("cgauCGAU", @entry.reverse_complement.seq)
 235   end
 236
 237   def test_Seq_hamming_distance_returns_correctly
 238     seq1 = Seq.new("test1", "ATCG")
 239     seq2 = Seq.new("test2", "atgg")
 240     assert_equal(1, seq1.hamming_distance(seq2))
 241   end
 242
 243   def test_Seq_generate_with_length_lt_1_raises
 244     assert_raise(SeqError) { @entry.generate(-10, "dna") }
 245     assert_raise(SeqError) { @entry.generate(0, "dna") }
 246   end
 247
 248   def test_Seq_generate_with_bad_type_raises
 249     assert_raise(SeqError) { @entry.generate(10, "foo") }
 250   end
 251
 252   def test_Seq_generate_with_ok_type_dont_raise
 253     %w[dna DNA rna RNA protein Protein].each do |type|
 254       assert_nothing_raised { @entry.generate(10, type) }
 255     end
 256   end
 257
 258   def test_Seq_subseq_with_start_lt_0_raises
 259     @entry.seq = "ATCG"
 260     assert_raise(SeqError) { @entry.subseq(-1, 1) }
 261   end
 262
 263   def test_Seq_subseq_with_length_lt_1_raises
 264     @entry.seq = "ATCG"
 265     assert_raise(SeqError) { @entry.subseq(0, 0) }
 266   end
 267
 268   def test_Seq_subseq_with_start_plus_length_gt_seq_raises
 269     @entry.seq = "ATCG"
 270     assert_raise(SeqError) { @entry.subseq(0, 5) }
 271   end
 272
 273   def test_Seq_subseq_returns_correct_sequence
 274     @entry.seq  = "ATCG"
 275     assert_equal("AT", @entry.subseq(0, 2).seq)
 276     assert_equal("CG", @entry.subseq(2, 2).seq)
 277   end
 278
 279   def test_Seq_subseq_without_len_returns_correct_sequence
 280     @entry.seq  = "ATCG"
 281     assert_equal("ATCG", @entry.subseq(0).seq)
 282     assert_equal("CG",   @entry.subseq(2).seq)
 283   end
 284
 285   def test_Seq_subseq_returns_correct_qual
 286     @entry.seq  = "ATCG"
 287     @entry.qual = "abcd"
 288     assert_equal("ab", @entry.subseq(0, 2).qual)
 289     assert_equal("cd", @entry.subseq(2, 2).qual)
 290   end
 291
 292   def test_Seq_subseq_without_len_returns_correct_qual
 293     @entry.seq  = "ATCG"
 294     @entry.qual = "abcd"
 295     assert_equal("abcd", @entry.subseq(0).qual)
 296     assert_equal("cd",   @entry.subseq(2).qual)
 297   end
 298
 299   def test_Seq_subseq_bang_with_start_lt_0_raises
 300     @entry.seq = "ATCG"
 301     assert_raise(SeqError) { @entry.subseq!(-1, 1) }
 302   end
 303
 304   def test_Seq_subseq_bang_with_length_lt_1_raises
 305     @entry.seq = "ATCG"
 306     assert_raise(SeqError) { @entry.subseq!(0, 0) }
 307   end
 308
 309   def test_Seq_subseq_bang_with_start_plus_length_gt_seq_raises
 310     @entry.seq = "ATCG"
 311     assert_raise(SeqError) { @entry.subseq!(0, 5) }
 312   end
 313
 314   def test_Seq_subseq_bang_returns_correct_sequence
 315     @entry.seq  = "ATCG"
 316     @entry.subseq!(0, 2)
 317     assert_equal("AT", @entry.seq)
 318     @entry.seq  = "ATCG"
 319     @entry.subseq!(2, 2)
 320     assert_equal("CG", @entry.seq)
 321   end
 322
 323   def test_Seq_subseq_bang_without_len_returns_correct_sequence
 324     @entry.seq  = "ATCG"
 325     @entry.subseq!(0)
 326     assert_equal("ATCG", @entry.seq)
 327     @entry.seq  = "ATCG"
 328     @entry.subseq!(2)
 329     assert_equal("CG", @entry.seq)
 330   end
 331
 332   def test_Seq_subseq_bang_with_pos_and_len_returns_correct_qual
 333     @entry.seq  = "ATCG"
 334     @entry.qual = "abcd"
 335     @entry.subseq!(0, 2)
 336     assert_equal("ab", @entry.qual)
 337     @entry.seq  = "ATCG"
 338     @entry.qual = "abcd"
 339     @entry.subseq!(2, 2)
 340     assert_equal("cd", @entry.qual)
 341   end
 342
 343   def test_Seq_subseq_bang_with_pos_returns_correct_qual
 344     @entry.seq  = "ATCG"
 345     @entry.qual = "abcd"
 346     @entry.subseq!(0)
 347     assert_equal("abcd", @entry.qual)
 348     @entry.seq  = "ATCG"
 349     @entry.qual = "abcd"
 350     @entry.subseq!(2)
 351     assert_equal("cd", @entry.qual)
 352   end
 353
 354   def test_Seq_subseq_rand_returns_correct_sequence
 355     @entry.seq  = "ATCG"
 356     assert_equal("ATCG", @entry.subseq_rand(4).seq)
 357   end
 358
 359   def test_Seq_composition_returns_correctly
 360     @entry.seq = "AAAATTTCCG"
 361     assert_equal(4, @entry.composition["A"])
 362     assert_equal(3, @entry.composition["T"])
 363     assert_equal(2, @entry.composition["C"])
 364     assert_equal(1, @entry.composition["G"])
 365     assert_equal(0, @entry.composition["X"])
 366   end
 367
 368   def test_Seq_homopol_max_returns_0_with_empty_sequence
 369     @entry.seq = ""
 370     assert_equal(0, @entry.homopol_max)
 371   end
 372
 373   def test_Seq_homopol_max_returns_0_with_nil_sequence
 374     @entry.seq = nil
 375     assert_equal(0, @entry.homopol_max)
 376   end
 377
 378   def test_Seq_homopol_max_returns_0_when_not_found
 379     @entry.seq = "AtTcCcGggGnnNnn"
 380     assert_equal(0, @entry.homopol_max(6))
 381   end
 382
 383   def test_Seq_homopol_max_returns_correctly
 384     @entry.seq = "AtTcCcGggGnnNnn"
 385     assert_equal(5, @entry.homopol_max(3))
 386   end
 387
 388   def test_Seq_hard_mask_returns_correctly
 389     @entry.seq = "--AAAANn"
 390     assert_equal(33.33, @entry.hard_mask)
 391   end
 392
 393   def test_Seq_soft_mask_returns_correctly
 394     @entry.seq = "--AAAa"
 395     assert_equal(25.00, @entry.soft_mask)
 396   end
 397 end
 398
 399
 400 __END__