test_SCOP_Des.py

# Copyright 2001 by Gavin E. Crooks.  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.


"""Unit test for Des"""

import unittest

from Bio.SCOP import Des


class DesTests(unittest.TestCase):

    def setUp(self):
        self.filename = './SCOP/dir.des.scop.txt_test'

    def testParse(self):
        """Test if all records in a DES file are being read"""
        f = open(self.filename)
        try:
            count = 0
            records = Des.parse(f)
            for record in records:
                count += 1
            self.assertEqual(count, 20)
        finally:
            f.close()

    def testStr(self):
        """Test if we can convert each record to a string correctly"""
        f = open(self.filename)
        try:
            for line in f:
                record = Des.Record(line)
                # End of line is platform dependent. Strip it off
                self.assertEqual(str(record).rstrip(), line.rstrip())
        finally:
            f.close()

    def testError(self):
        """Test if a corrupt record raises the appropriate exception"""
        corruptRec = "49268\tsp\tb.1.2.1\t-\n"
        self.assertRaises(ValueError, Des.Record, corruptRec)

    def testRecord(self):
        """Test one record in detail"""
        recLine = '49268\tsp\tb.1.2.1\t-\tHuman (Homo sapiens)    \n'
        recFields = (49268, 'sp', 'b.1.2.1', '', 'Human (Homo sapiens)')

        record = Des.Record(recLine)
        self.assertEqual(record.sunid, recFields[0])
        self.assertEqual(record.nodetype, recFields[1])
        self.assertEqual(record.sccs, recFields[2])
        self.assertEqual(record.name, recFields[3])
        self.assertEqual(record.description, recFields[4])


if __name__ == '__main__':
    runner = unittest.TextTestRunner(verbosity=2)
    unittest.main(testRunner=runner)