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import os
import screed
from screed.DBConstants import fileExtension
class Test_dna(object):
"""Tests the dna module of screed"""
def test_is_DNA(args):
valid_DNA_str = "ATCCG"
invalid_DNA_str = "ATXXG"
assert screed.dna.is_DNA(valid_DNA_str)
assert not screed.dna.is_DNA(invalid_DNA_str)
def test_complement(args):
dna = "ATCCG"
comp = "TAGGC"
assert screed.dna.complement(dna) == comp
def test_reverse(args):
dna = "ATCCG"
reverse = "GCCTA"
assert screed.dna.reverse(dna) == reverse
def test_reverse_complement(args):
dna = "ATCCG"
reverse_complement = "CGGAT"
assert screed.dna.reverse_complement(dna) == reverse_complement
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