# Copyright 2009 by Peter Cock. All rights reserved. # This code is part of the Biopython distribution and governed by its # license. Please see the LICENSE file that should have been included # as part of this package. """Unittests for the Seq objects.""" import warnings import unittest from Bio import BiopythonWarning from Bio import SeqIO from Bio.Data.IUPACData import ambiguous_dna_values, ambiguous_rna_values from Bio.Seq import Seq, UnknownSeq, MutableSeq, translate from Bio.Data.CodonTable import TranslationError, CodonTable # This is just the standard table with less stop codons # (replaced with coding for O as an artificial example) # Turn black code style off # fmt: off special_table = CodonTable(forward_table={ "TTT": "F", "TTC": "F", "TTA": "L", "TTG": "L", "TCT": "S", "TCC": "S", "TCA": "S", "TCG": "S", "TAT": "Y", "TAC": "Y", "TAA": "O", "TGT": "C", "TGC": "C", "TGA": "O", "TGG": "W", "CTT": "L", "CTC": "L", "CTA": "L", "CTG": "L", "CCT": "P", "CCC": "P", "CCA": "P", "CCG": "P", "CAT": "H", "CAC": "H", "CAA": "Q", "CAG": "Q", "CGT": "R", "CGC": "R", "CGA": "R", "CGG": "R", "ATT": "I", "ATC": "I", "ATA": "I", "ATG": "M", "ACT": "T", "ACC": "T", "ACA": "T", "ACG": "T", "AAT": "N", "AAC": "N", "AAA": "K", "AAG": "K", "AGT": "S", "AGC": "S", "AGA": "R", "AGG": "R", "GTT": "V", "GTC": "V", "GTA": "V", "GTG": "V", "GCT": "A", "GCC": "A", "GCA": "A", "GCG": "A", "GAT": "D", "GAC": "D", "GAA": "E", "GAG": "E", "GGT": "G", "GGC": "G", "GGA": "G", "GGG": "G"}, start_codons=["TAA", "TAG", "TGA"], stop_codons=["TAG"], ) Chilodonella_uncinata_table = CodonTable(forward_table={ "TTT": "F", "TTC": "F", "TTA": "L", "TTG": "L", "TCT": "S", "TCC": "S", "TCA": "S", "TCG": "S", "TAT": "Y", "TAC": "Y", "TAG": "Q", # noqa: E241 "TGT": "C", "TGC": "C", "TGA": "W", "TGG": "W", "CTT": "L", "CTC": "L", "CTA": "L", "CTG": "L", "CCT": "P", "CCC": "P", "CCA": "P", "CCG": "P", "CAT": "H", "CAC": "H", "CAA": "Q", "CAG": "Q", "CGT": "R", "CGC": "R", "CGA": "R", "CGG": "R", "ATT": "I", "ATC": "I", "ATA": "I", "ATG": "M", "ACT": "T", "ACC": "T", "ACA": "T", "ACG": "T", "AAT": "N", "AAC": "N", "AAA": "K", "AAG": "K", "AGT": "S", "AGC": "S", "AGA": "R", "AGG": "R", "GTT": "V", "GTC": "V", "GTA": "V", "GTG": "V", "GCT": "A", "GCC": "A", "GCA": "A", "GCG": "A", "GAT": "D", "GAC": "D", "GAA": "E", "GAG": "E", "GGT": "G", "GGC": "G", "GGA": "G", "GGG": "G"}, start_codons=["ATG"], stop_codons=["TAA"], ) # Turn black code style on # fmt: on class StringMethodTests(unittest.TestCase): _examples = [ # These are length 9, a multiple of 3 for translation tests: Seq("ACGTGGGGT"), Seq("ACGUGGGGU"), Seq("GG"), Seq("A"), UnknownSeq(1), UnknownSeq(1, character="n"), UnknownSeq(1, character="N"), UnknownSeq(12, character="N"), UnknownSeq(12, character="X"), UnknownSeq(12), ] for seq in _examples[:]: if isinstance(seq, Seq): _examples.append(seq.tomutable()) _start_end_values = [0, 1, 2, 1000, -1, -2, -999, None] def _test_method(self, method_name, pre_comp_function=None, start_end=False): """Check this method matches the plain string's method.""" if pre_comp_function is None: # Define a no-op function: def pre_comp_function(x): return x self.assertIsInstance(method_name, str) for example1 in self._examples: if not hasattr(example1, method_name): # e.g. MutableSeq does not support find continue str1 = str(example1) for example2 in self._examples: if not hasattr(example2, method_name): # e.g. MutableSeq does not support find continue if ( method_name in ("index", "rindex") and isinstance(example1, MutableSeq) and len(example2) > 1 ): # MutableSeq index only supports single entries continue str2 = str(example2) try: i = pre_comp_function(getattr(example1, method_name)(str2)) except ValueError: i = ValueError try: j = pre_comp_function(getattr(str1, method_name)(str2)) except ValueError: j = ValueError if i != j: raise ValueError( "%r.%s(%r) = %r, not %r" % (example1, method_name, str2, i, j) ) try: i = pre_comp_function(getattr(example1, method_name)(example2)) except ValueError: i = ValueError try: j = pre_comp_function(getattr(str1, method_name)(str2)) except ValueError: j = ValueError if i != j: raise ValueError( "%r.%s(%r) = %r, not %r" % (example1, method_name, example2, i, j) ) if start_end: if isinstance(example1, MutableSeq): # Does not support start/end arguments continue for start in self._start_end_values: try: i = pre_comp_function( getattr(example1, method_name)(str2, start) ) except ValueError: i = ValueError try: j = pre_comp_function( getattr(str1, method_name)(str2, start) ) except ValueError: j = ValueError if i != j: raise ValueError( "%r.%s(%r, %i) = %r, not %r" % (example1, method_name, str2, start, i, j) ) for end in self._start_end_values: try: i = pre_comp_function( getattr(example1, method_name)(str2, start, end) ) except ValueError: i = ValueError try: j = pre_comp_function( getattr(str1, method_name)(str2, start, end) ) except ValueError: j = ValueError if i != j: raise ValueError( "%r.%s(%r, %i, %i) = %r, not %r" % (example1, method_name, str2, start, end, i, j,) ) def test_str_count(self): """Check matches the python string count method.""" self._test_method("count", start_end=True) def test_str_count_overlap_GG(self): """Check our count_overlap method using GG.""" # Testing with self._examples expected = [ 3, 3, 1, 0, 0, 0, 0, 0, 0, 0, ] expected *= 2 # MutableSeq() Tests assert len(self._examples) == len(expected) for seq, exp in zip(self._examples, expected): # Using search term GG as a string self.assertEqual(seq.count_overlap("GG"), exp) self.assertEqual(seq.count_overlap("G" * 5), 0) # Using search term GG as a Seq self.assertEqual(seq.count_overlap(Seq("GG")), exp) self.assertEqual(seq.count_overlap(Seq("G" * 5)), 0) def test_count_overlap_start_end_GG(self): """Check our count_overlap method using GG with variable ends and starts.""" # Testing Seq() and MutableSeq() with variable start and end arguments start_end_exp = [ (1, 7, 3), (3, None, 3), (3, 6, 2), (4, 6, 1), (4, -1, 2), (-5, None, 2), (-5, 7, 2), (7, -5, 0), (-100, None, 3), (None, 100, 3), (-100, 1000, 3), ] testing_seq = "GTAGGGGAG" for start, end, exp in start_end_exp: self.assertEqual(Seq(testing_seq).count_overlap("GG", start, end), exp) self.assertEqual( MutableSeq(testing_seq).count_overlap("GG", start, end), exp ) # Testing Seq() and MutableSeq() with a more heterogeneous sequenece self.assertEqual(Seq("GGGTGGTAGGG").count_overlap("GG"), 5) self.assertEqual(MutableSeq("GGGTGGTAGGG").count_overlap("GG"), 5) self.assertEqual(Seq("GGGTGGTAGGG").count_overlap("GG", 2, 8), 1) self.assertEqual(MutableSeq("GGGTGGTAGGG").count_overlap("GG", 2, 8), 1) self.assertEqual(Seq("GGGTGGTAGGG").count_overlap("GG", -11, 6), 3) self.assertEqual(MutableSeq("GGGTGGTAGGG").count_overlap("GG", -11, 6), 3) self.assertEqual(Seq("GGGTGGTAGGG").count_overlap("GG", 7, 2), 0) self.assertEqual(MutableSeq("GGGTGGTAGGG").count_overlap("GG", 7, 2), 0) self.assertEqual(Seq("GGGTGGTAGGG").count_overlap("GG", -2, -10), 0) # Testing UnknownSeq() with variable start and end arguments char_start_end_exp = [ ("N", 1, 7, 0), ("N", 1, 7, 0), ("N", -4, None, 0), ("N", -4, None, 0), ("X", 1, 7, 0), ] for char, start, end, exp in char_start_end_exp: self.assertEqual( UnknownSeq(12, character=char).count_overlap("GG", start, end), exp ) self.assertEqual(UnknownSeq(12, character="X").count_overlap("GG", 1, 7), 0) # Testing UnknownSeq() with some more cases including unusual edge cases substr_start_end_exp = [ ("G", 100, 105, 0), ("G", -1, 4, 0), ("G", 4, -1, 0), ("G", -8, -2, 0), ("G", -2, -8, 0), ("G", 8, 2, 0), ("G", 2, 8, 0), ("GG", 8, 2, 0), ("GG", 2, 8, 0), ("GG", -5, -1, 0), ("GG", 1, 5, 0), ("GGG", None, None, 0), ("GGGGGGGGG", None, None, 0), ("GGG", 1, 2, 0), ] for substr, start, end, exp in substr_start_end_exp: self.assertEqual( UnknownSeq(7, character="N").count_overlap(substr, start, end), exp ) self.assertEqual(UnknownSeq(7, character="N").count_overlap("GG", 1), 0) def test_str_count_overlap_NN(self): """Check our count_overlap method using NN.""" # Testing with self._examples expected = [ 0, 0, 0, 0, # Seq() Tests 0, 0, 0, 11, 0, 0, ] # UnknownSeq() Tests expected *= 2 # MutableSeq() Tests assert len(self._examples) == len(expected) for seq, exp in zip(self._examples, expected): # Using search term NN as a string self.assertEqual(seq.count_overlap("NN"), exp) self.assertEqual(seq.count_overlap("N" * 13), 0) # Using search term NN as a Seq self.assertEqual(seq.count_overlap(Seq("NN")), exp) self.assertEqual(seq.count_overlap(Seq("N" * 13)), 0) def test_count_overlap_start_end_NN(self): """Check our count_overlap method using NN with variable ends and starts.""" # Testing Seq() and MutableSeq() with variable start and end arguments start_end_exp = [ (1, 7, 0), (3, None, 0), (3, 6, 0), (4, 6, 0), (4, -1, 0), (-5, None, 0), (-5, 7, 0), (7, -5, 0), (-100, None, 0), (None, 100, 0), (-100, 1000, 0), ] testing_seq = "GTAGGGGAG" for start, end, exp in start_end_exp: self.assertEqual(Seq(testing_seq).count_overlap("NN", start, end), exp) self.assertEqual( MutableSeq(testing_seq).count_overlap("NN", start, end), exp ) # Testing Seq() and MutableSeq() with a more heterogeneous sequenece self.assertEqual(Seq("GGGTGGTAGGG").count_overlap("NN"), 0) self.assertEqual(MutableSeq("GGGTGGTAGGG").count_overlap("NN"), 0) self.assertEqual(Seq("GGGTGGTAGGG").count_overlap("NN", 2, 8), 0) self.assertEqual(MutableSeq("GGGTGGTAGGG").count_overlap("NN", 2, 8), 0) self.assertEqual(Seq("GGGTGGTAGGG").count_overlap("NN", -11, 6), 0) self.assertEqual(MutableSeq("GGGTGGTAGGG").count_overlap("NN", -11, 6), 0) self.assertEqual(Seq("GGGTGGTAGGG").count_overlap("NN", 7, 2), 0) self.assertEqual(MutableSeq("GGGTGGTAGGG").count_overlap("NN", 7, 2), 0) self.assertEqual(Seq("GGGTGGTAGGG").count_overlap("NN", -10, -2), 0) # Testing UnknownSeq() with variable start and end arguments char_start_end_exp = [ ("N", 1, 7, 5), ("N", 1, 7, 5), ("N", -4, None, 3), ("N", -4, None, 3), ("X", 1, 7, 0), ] for char, start, end, exp in char_start_end_exp: self.assertEqual( UnknownSeq(12, character=char).count_overlap("NN", start, end), exp ) self.assertEqual(UnknownSeq(12, character="X").count_overlap("NN", 1, 7), 0) # Testing UnknownSeq() with some more cases including unusual edge cases substr_start_end_exp = [ ("N", 100, 105, 0), ("N", -1, 4, 0), ("N", 4, -1, 2), ("N", -8, -2, 5), ("N", -2, -8, 0), ("N", 8, 2, 0), ("N", 2, 8, 5), ("NN", 8, 2, 0), ("NN", 2, 8, 4), ("NN", -5, -1, 3), ("NN", 1, 5, 3), ("NNN", None, None, 5), ("NNNNNNNNN", None, None, 0), ("NNN", 1, 2, 0), ] for substr, start, end, exp in substr_start_end_exp: self.assertEqual( UnknownSeq(7, character="N").count_overlap(substr, start, end), exp ) self.assertEqual(UnknownSeq(7, character="N").count_overlap("NN", 1), 5) def test_str_find(self): """Check matches the python string find method.""" self._test_method("find", start_end=True) def test_str_rfind(self): """Check matches the python string rfind method.""" self._test_method("rfind", start_end=True) def test_str_index(self): """Check matches the python string index method.""" self._test_method("index", start_end=True) def test_str_rindex(self): """Check matches the python string rindex method.""" self._test_method("rindex", start_end=True) def test_str_startswith(self): """Check matches the python string startswith method.""" self._test_method("startswith", start_end=True) self.assertTrue("ABCDE".startswith(("ABE", "OBE", "ABC"))) # Now check with a tuple of sub sequences for example1 in self._examples: if not hasattr(example1, "startswith"): # e.g. MutableSeq does not support this continue subs = tuple( example1[start : start + 2] for start in range(0, len(example1) - 2, 3) ) subs_str = tuple(str(s) for s in subs) self.assertEqual( str(example1).startswith(subs_str), example1.startswith(subs) ) self.assertEqual( str(example1).startswith(subs_str), example1.startswith(subs_str) ) # strings! self.assertEqual( str(example1).startswith(subs_str, 3), example1.startswith(subs, 3) ) self.assertEqual( str(example1).startswith(subs_str, 2, 6), example1.startswith(subs, 2, 6), ) def test_str_endswith(self): """Check matches the python string endswith method.""" self._test_method("endswith", start_end=True) self.assertTrue("ABCDE".endswith(("ABE", "OBE", "CDE"))) # Now check with a tuple of sub sequences for example1 in self._examples: if not hasattr(example1, "endswith"): # e.g. MutableSeq does not support this continue subs = tuple( example1[start : start + 2] for start in range(0, len(example1) - 2, 3) ) subs_str = tuple(str(s) for s in subs) self.assertEqual(str(example1).endswith(subs_str), example1.endswith(subs)) self.assertEqual( str(example1).startswith(subs_str), example1.startswith(subs_str) ) # strings! self.assertEqual( str(example1).endswith(subs_str, 3), example1.endswith(subs, 3) ) self.assertEqual( str(example1).endswith(subs_str, 2, 6), example1.endswith(subs, 2, 6) ) def test_str_strip(self): """Check matches the python string strip method.""" self._test_method("strip", pre_comp_function=str) def test_str_rstrip(self): """Check matches the python string rstrip method.""" self._test_method("rstrip", pre_comp_function=str) def test_str_split(self): """Check matches the python string rstrip method.""" # Calling split should return a list of Seq-like objects, we'll # just apply str() to each of them so it matches the string method self._test_method( "split", pre_comp_function=lambda x: [str(y) for y in x] # noqa: E731 ) def test_str_rsplit(self): """Check matches the python string rstrip method.""" # Calling rsplit should return a list of Seq-like objects, we'll # just apply str() to each of them so it matches the string method self._test_method( "rsplit", pre_comp_function=lambda x: [str(y) for y in x] # noqa: E731 ) def test_str_lsplit(self): """Check matches the python string rstrip method.""" # Calling lsplit should return a list of Seq-like objects, we'll # just apply str() to each of them so it matches the string method self._test_method( "lsplit", pre_comp_function=lambda x: [str(y) for y in x] # noqa: E731 ) def test_str_length(self): """Check matches the python string __len__ method.""" for example1 in self._examples: str1 = str(example1) self.assertEqual(len(example1), len(str1)) def test_str_upper(self): """Check matches the python string upper method.""" for example1 in self._examples: if isinstance(example1, MutableSeq): continue str1 = str(example1) self.assertEqual(str(example1.upper()), str1.upper()) def test_str_lower(self): """Check matches the python string lower method.""" for example1 in self._examples: if isinstance(example1, MutableSeq): continue str1 = str(example1) self.assertEqual(str(example1.lower()), str1.lower()) def test_str_encode(self): """Check matches the python string encode method.""" for example1 in self._examples: if isinstance(example1, MutableSeq): continue str1 = str(example1) self.assertEqual(example1.encode("ascii"), str1.encode("ascii")) self.assertEqual(example1.encode(), str1.encode()) def test_str_hash(self): for example1 in self._examples: if isinstance(example1, MutableSeq): continue with warnings.catch_warnings(): # Silence change in behaviour warning warnings.simplefilter("ignore", BiopythonWarning) self.assertEqual( hash(str(example1)), hash(example1), "Hash mismatch, %r for %r vs %r for %r" % (hash(str(example1)), id(example1), hash(example1), example1), ) def test_str_comparison(self): for example1 in self._examples: for example2 in self._examples: with warnings.catch_warnings(): self.assertEqual( str(example1) == str(example2), example1 == example2, "Checking %r == %r" % (example1, example2), ) self.assertEqual( str(example1) != str(example2), example1 != example2, "Checking %r != %r" % (example1, example2), ) self.assertEqual( str(example1) < str(example2), example1 < example2, "Checking %r < %r" % (example1, example2), ) self.assertEqual( str(example1) <= str(example2), example1 <= example2, "Checking %r <= %r" % (example1, example2), ) self.assertEqual( str(example1) > str(example2), example1 > example2, "Checking %r > %r" % (example1, example2), ) self.assertEqual( str(example1) >= str(example2), example1 >= example2, "Checking %r >= %r" % (example1, example2), ) def test_str_getitem(self): """Check slicing and indexing works like a string.""" for example1 in self._examples: str1 = str(example1) for i in self._start_end_values: if i is not None and abs(i) < len(example1): self.assertEqual(str(example1[i]), str1[i]) self.assertEqual(str(example1[:i]), str1[:i]) self.assertEqual(str(example1[i:]), str1[i:]) for j in self._start_end_values: self.assertEqual(str(example1[i:j]), str1[i:j]) for step in range(-3, 4): if step == 0: try: print(example1[i:j:step]) self._assert(False) # Should fail! except ValueError: pass else: self.assertEqual(str(example1[i:j:step]), str1[i:j:step]) def test_tomutable(self): """Check obj.tomutable() method.""" for example1 in self._examples: if isinstance(example1, MutableSeq): continue mut = example1.tomutable() self.assertIsInstance(mut, MutableSeq) self.assertEqual(str(mut), str(example1)) def test_toseq(self): """Check obj.toseq() method.""" for example1 in self._examples: try: seq = example1.toseq() except AttributeError: self.assertIsInstance(example1, Seq) continue self.assertIsInstance(seq, Seq) self.assertEqual(str(seq), str(example1)) def test_the_complement(self): """Check obj.complement() method.""" mapping = "" for example1 in self._examples: if isinstance(example1, MutableSeq): continue try: comp = example1.complement() except ValueError as e: self.assertEqual(str(e), "Proteins do not have complements!") continue str1 = str(example1) if "U" in str1 or "u" in str1: mapping = str.maketrans("ACGUacgu", "UGCAugca") else: # Default to DNA, e.g. complement("A") -> "T" not "U" mapping = str.maketrans("ACGTacgt", "TGCAtgca") self.assertEqual(str1.translate(mapping), str(comp)) def test_the_reverse_complement(self): """Check obj.reverse_complement() method.""" mapping = "" for example1 in self._examples: if isinstance(example1, MutableSeq): continue try: comp = example1.reverse_complement() except ValueError as e: self.assertEqual(str(e), "Proteins do not have complements!") continue str1 = str(example1) if "U" in str1 or "u" in str1: mapping = str.maketrans("ACGUacgu", "UGCAugca") else: # Defaults to DNA, so reverse_complement("A") --> "T" not "U" mapping = str.maketrans("ACGTacgt", "TGCAtgca") self.assertEqual(str1.translate(mapping)[::-1], str(comp)) def test_the_transcription(self): """Check obj.transcribe() method.""" mapping = "" for example1 in self._examples: if isinstance(example1, MutableSeq): continue try: tran = example1.transcribe() except ValueError as e: if str(e) == "Proteins cannot be transcribed!": continue if str(e) == "RNA cannot be transcribed!": continue raise str1 = str(example1) if len(str1) % 3 != 0: # TODO - Check for or silence the expected warning? continue self.assertEqual(str1.replace("T", "U").replace("t", "u"), str(tran)) def test_the_back_transcription(self): """Check obj.back_transcribe() method.""" mapping = "" for example1 in self._examples: if isinstance(example1, MutableSeq): continue try: tran = example1.back_transcribe() except ValueError as e: if str(e) == "Proteins cannot be back transcribed!": continue if str(e) == "DNA cannot be back transcribed!": continue raise str1 = str(example1) self.assertEqual(str1.replace("U", "T").replace("u", "t"), str(tran)) def test_the_translate(self): """Check obj.translate() method.""" mapping = "" for example1 in self._examples: if isinstance(example1, MutableSeq): continue if len(example1) % 3 != 0: # TODO - Check for or silence the expected warning? continue try: tran = example1.translate() except ValueError as e: if str(e) == "Proteins cannot be translated!": continue raise # Try with positional vs named argument: self.assertEqual(example1.translate(11), example1.translate(table=11)) # TODO - check the actual translation, and all the optional args def test_the_translation_of_stops(self): """Check obj.translate() method with stop codons.""" misc_stops = "TAATAGTGAAGAAGG" nuc = Seq(misc_stops) self.assertEqual("***RR", str(nuc.translate())) self.assertEqual("***RR", str(nuc.translate(1))) self.assertEqual("***RR", str(nuc.translate("SGC0"))) self.assertEqual("**W**", str(nuc.translate(table=2))) self.assertEqual("**WRR", str(nuc.translate(table="Yeast Mitochondrial"))) self.assertEqual("**WSS", str(nuc.translate(table=5))) self.assertEqual("**WSS", str(nuc.translate(table=9))) self.assertEqual("**CRR", str(nuc.translate(table="Euplotid Nuclear"))) self.assertEqual("***RR", str(nuc.translate(table=11))) self.assertEqual("***RR", str(nuc.translate(table="11"))) self.assertEqual("***RR", str(nuc.translate(table="Bacterial"))) self.assertEqual("**GRR", str(nuc.translate(table=25))) self.assertEqual("", str(nuc.translate(to_stop=True))) self.assertEqual("O*ORR", str(nuc.translate(table=special_table))) self.assertEqual("*QWRR", str(nuc.translate(table=Chilodonella_uncinata_table))) # These test the Bio.Seq.translate() function - move these?: self.assertEqual( "*QWRR", translate(str(nuc), table=Chilodonella_uncinata_table) ) self.assertEqual("O*ORR", translate(str(nuc), table=special_table)) self.assertEqual("", translate(str(nuc), to_stop=True)) self.assertEqual("***RR", translate(str(nuc), table="Bacterial")) self.assertEqual("***RR", translate(str(nuc), table="11")) self.assertEqual("***RR", translate(str(nuc), table=11)) self.assertEqual("**W**", translate(str(nuc), table=2)) self.assertEqual(str(Seq("TAT").translate()), "Y") self.assertEqual(str(Seq("TAR").translate()), "*") self.assertEqual(str(Seq("TAN").translate()), "X") self.assertEqual(str(Seq("NNN").translate()), "X") self.assertEqual(str(Seq("TAt").translate()), "Y") self.assertEqual(str(Seq("TaR").translate()), "*") self.assertEqual(str(Seq("TaN").translate()), "X") self.assertEqual(str(Seq("nnN").translate()), "X") self.assertEqual(str(Seq("tat").translate()), "Y") self.assertEqual(str(Seq("tar").translate()), "*") self.assertEqual(str(Seq("tan").translate()), "X") self.assertEqual(str(Seq("nnn").translate()), "X") def test_the_translation_of_invalid_codons(self): """Check obj.translate() method with invalid codons.""" for codon in ["TA?", "N-N", "AC_", "Ac_"]: nuc = Seq(codon) try: nuc.translate() self.fail("Translating %s should fail" % codon) except TranslationError: pass def test_the_translation_of_ambig_codons(self): """Check obj.translate() method with ambiguous codons.""" for ambig_values in [ambiguous_dna_values, ambiguous_rna_values]: ambig = set(ambig_values.keys()) ambig.remove("X") for c1 in ambig: for c2 in ambig: for c3 in ambig: values = { str(Seq(a + b + c).translate()) for a in ambig_values[c1] for b in ambig_values[c2] for c in ambig_values[c3] } t = str(Seq(c1 + c2 + c3).translate()) if t == "*": self.assertEqual(values, set("*")) elif t == "X": self.assertGreater( len(values), 1, "translate('%s') = '%s' not '%s'" % (c1 + c2 + c3, t, ",".join(values)), ) elif t == "Z": self.assertEqual(values, set("EQ")) elif t == "B": self.assertEqual(values, set("DN")) elif t == "J": self.assertEqual(values, set("LI")) else: self.assertEqual(values, set(t)) # TODO - Use the Bio.Data.IUPACData module for the # ambiguous protein mappings? def test_init_typeerror(self): """Check Seq __init__ gives TypeError exceptions.""" # Only expect it to take strings - not Seq objects! self.assertRaises(TypeError, Seq, 1066) self.assertRaises(TypeError, Seq, Seq("ACGT")) def test_MutableSeq_init_typeerror(self): """Check MutableSeq __init__ gives TypeError exceptions.""" self.assertRaises(TypeError, MutableSeq, (Seq("A"))) self.assertRaises(TypeError, MutableSeq, (UnknownSeq(1))) self.assertRaises(TypeError, MutableSeq, 1) self.assertRaises(TypeError, MutableSeq, 1.0) def test_join_Seq_TypeError(self): """Checks that a TypeError is thrown for all non-iterable types.""" # No iterable types which contain non-accepted types either. spacer = Seq("NNNNN") self.assertRaises(TypeError, spacer.join, 5) self.assertRaises(TypeError, spacer.join, ["ATG", "ATG", 5, "ATG"]) def test_join_UnknownSeq_TypeError_iter(self): """Checks that a TypeError is thrown for all non-iterable types.""" # No iterable types which contain non-accepted types either. spacer = UnknownSeq(5, character="-") self.assertRaises(TypeError, spacer.join, 5) self.assertRaises(TypeError, spacer.join, ["ATG", "ATG", 5, "ATG"]) def test_join_MutableSeq_TypeError_iter(self): """Checks that a TypeError is thrown for all non-iterable types.""" # No iterable types which contain non-accepted types either. spacer = MutableSeq("MMMMM") self.assertRaises(TypeError, spacer.join, 5) self.assertRaises(TypeError, spacer.join, ["ATG", "ATG", 5, "ATG"]) def test_join_Seq(self): """Checks if Seq join correctly concatenates sequence with the spacer.""" spacer = Seq("NNNNN") self.assertEqual( "N" * 15, spacer.join([Seq("NNNNN"), Seq("NNNNN")]), ) spacer1 = Seq("") spacers = [spacer1, Seq("NNNNN"), Seq("GGG")] example_strings = ["ATG", "ATG", "ATG", "ATG"] example_strings_seqs = ["ATG", "ATG", Seq("ATG"), "ATG"] # strings with empty spacer str_concatenated = spacer1.join(example_strings) self.assertEqual(str(str_concatenated), "".join(example_strings)) for spacer in spacers: seq_concatenated = spacer.join(example_strings_seqs) self.assertEqual(str(seq_concatenated), str(spacer).join(example_strings)) # Now try single sequence arguments, should join the letters for target in example_strings + example_strings_seqs: self.assertEqual( str(spacer).join(str(target)), str(spacer.join(target)) ) def test_join_UnknownSeq(self): """Checks if UnknownSeq join correctly concatenates sequence with the spacer.""" spacer1 = UnknownSeq(5, character="-") spacer2 = UnknownSeq(0, character="-") spacers = [spacer1, spacer2] self.assertEqual( "-" * 15, spacer1.join([UnknownSeq(5, character="-"), UnknownSeq(5, character="-")]), ) self.assertEqual( "N" * 5 + "-" * 10, spacer1.join([Seq("NNNNN"), UnknownSeq(5, character="-")]), ) example_strings = ["ATG", "ATG", "ATG", "ATG"] example_strings_seqs = ["ATG", "ATG", Seq("ATG"), "ATG"] # strings with empty spacer str_concatenated = spacer2.join(example_strings) self.assertEqual(str(str_concatenated), "".join(example_strings)) for spacer in spacers: seq_concatenated = spacer.join(example_strings_seqs) self.assertEqual(str(seq_concatenated), str(spacer).join(example_strings)) # Now try single sequence arguments, should join the letters for target in example_strings + example_strings_seqs: self.assertEqual( str(spacer).join(str(target)), str(spacer.join(target)) ) def test_join_MutableSeq_mixed(self): """Check MutableSeq objects can be joined.""" spacer = MutableSeq("NNNNN") self.assertEqual( "N" * 15, spacer.join([MutableSeq("NNNNN"), MutableSeq("NNNNN")]), ) self.assertRaises( TypeError, spacer.join([Seq("NNNNN"), MutableSeq("NNNNN")]), ) def test_join_Seq_with_file(self): """Checks if Seq join correctly concatenates sequence from a file with the spacer.""" filename = "Fasta/f003" seqlist = [record.seq for record in SeqIO.parse(filename, "fasta")] seqlist_as_strings = [str(_) for _ in seqlist] spacer = Seq("NNNNN") spacer1 = Seq("") # seq objects with spacer seq_concatenated = spacer.join(seqlist) # seq objects with empty spacer seq_concatenated1 = spacer1.join(seqlist) ref_data = ref_data1 = "" ref_data = str(spacer).join(seqlist_as_strings) ref_data1 = str(spacer1).join(seqlist_as_strings) self.assertEqual(str(seq_concatenated), ref_data) self.assertEqual(str(seq_concatenated1), ref_data1) with self.assertRaises(TypeError): spacer.join(SeqIO.parse(filename, "fasta")) def test_join_UnknownSeq_with_file(self): """Checks if UnknownSeq join correctly concatenates sequence from a file with the spacer.""" filename = "Fasta/f003" seqlist = [record.seq for record in SeqIO.parse(filename, "fasta")] seqlist_as_strings = [str(_) for _ in seqlist] spacer = UnknownSeq(0, character="-") spacer1 = UnknownSeq(5, character="-") # seq objects with spacer seq_concatenated = spacer.join(seqlist) # seq objects with empty spacer seq_concatenated1 = spacer1.join(seqlist) ref_data = ref_data1 = "" ref_data = str(spacer).join(seqlist_as_strings) ref_data1 = str(spacer1).join(seqlist_as_strings) self.assertEqual(str(seq_concatenated), ref_data) self.assertEqual(str(seq_concatenated1), ref_data1) with self.assertRaises(TypeError): spacer.join(SeqIO.parse(filename, "fasta")) def test_join_MutableSeq(self): """Checks if MutableSeq join correctly concatenates sequence with the spacer.""" # Only expect it to take Seq objects and/or strings in an iterable! spacer1 = MutableSeq("") spacers = [ spacer1, MutableSeq("NNNNN"), MutableSeq("GGG"), ] example_strings = ["ATG", "ATG", "ATG", "ATG"] example_strings_seqs = ["ATG", "ATG", Seq("ATG"), "ATG"] # strings with empty spacer str_concatenated = spacer1.join(example_strings) self.assertEqual(str(str_concatenated), "".join(example_strings)) for spacer in spacers: seq_concatenated = spacer.join(example_strings_seqs) self.assertEqual(str(seq_concatenated), str(spacer).join(example_strings)) def test_join_MutableSeq_with_file(self): """Checks if MutableSeq join correctly concatenates sequence from a file with the spacer.""" filename = "Fasta/f003" seqlist = [record.seq for record in SeqIO.parse(filename, "fasta")] seqlist_as_strings = [str(_) for _ in seqlist] spacer = MutableSeq("NNNNN") spacer1 = MutableSeq("") # seq objects with spacer seq_concatenated = spacer.join(seqlist) # seq objects with empty spacer seq_concatenated1 = spacer1.join(seqlist) ref_data = ref_data1 = "" ref_data = str(spacer).join(seqlist_as_strings) ref_data1 = str(spacer1).join(seqlist_as_strings) self.assertEqual(str(seq_concatenated), ref_data) self.assertEqual(str(seq_concatenated1), ref_data1) with self.assertRaises(TypeError): spacer.join(SeqIO.parse(filename, "fasta")) # TODO - Addition... class FileBasedTests(unittest.TestCase): """Test Seq objects created from files by SeqIO.""" def test_unknown_seq_ungap(self): """Test ungap() works properly on UnknownSeq instances.""" rec = SeqIO.read("GenBank/NT_019265.gb", "genbank") self.assertIsInstance(rec.seq, UnknownSeq) ungapped_seq = rec.features[1].extract(rec.seq).ungap("-") self.assertIsInstance(ungapped_seq, UnknownSeq) if __name__ == "__main__": runner = unittest.TextTestRunner(verbosity=2) unittest.main(testRunner=runner)