Limnoria/test/test_utils.py

#!/usr/bin/env python

###
# Copyright (c) 2002, Jeremiah Fincher
# All rights reserved.
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# modification, are permitted provided that the following conditions are met:
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#   * Redistributions of source code must retain the above copyright notice,
#     this list of conditions, and the following disclaimer.
#   * Redistributions in binary form must reproduce the above copyright notice,
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#   * Neither the name of the author of this software nor the name of
#     contributors to this software may be used to endorse or promote products
#     derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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###

from test import *

import utils


class UtilsTest(unittest.TestCase):
    def testTimeElapsed(self):
        self.assertRaises(ValueError, utils.timeElapsed, 0, 0, seconds=False)
        then = 0
        now = 0
        for now, expected in [(0, '0 seconds'),
                              (1, '1 second'),
                              (60, '1 minute and 0 seconds'),
                              (61, '1 minute and 1 second'),
                              (62, '1 minute and 2 seconds'),
                              (122, '2 minutes and 2 seconds'),
                              (3722, '1 hour, 2 minutes and 2 seconds'),
                              (7322, '2 hours, 2 minutes and 2 seconds')]:
            self.assertEqual(utils.timeElapsed(now, then), expected)

    def testEachSubstring(self):
        s = 'foobar'
        L = ['f', 'fo', 'foo', 'foob', 'fooba', 'foobar']
        self.assertEqual(list(utils.eachSubstring(s)), L)

    def testDistance(self):
        self.assertEqual(utils.distance('', ''), 0)
        self.assertEqual(utils.distance('a', 'b'), 1)
        self.assertEqual(utils.distance('a', 'a'), 0)
        self.assertEqual(utils.distance('foobar', 'jemfinch'), 8)
        self.assertEqual(utils.distance('a', 'ab'), 1)
        self.assertEqual(utils.distance('foo', ''), 3)
        self.assertEqual(utils.distance('', 'foo'), 3)
        self.assertEqual(utils.distance('appel', 'nappe'), 2)
        self.assertEqual(utils.distance('nappe', 'appel'), 2)

    def testAbbrev(self):
        L = ['abc', 'bcd', 'bbe', 'foo', 'fool']
        d = utils.abbrev(L)
        def getItem(s):
            return d[s]
        self.assertRaises(KeyError, getItem, 'f')
        self.assertRaises(KeyError, getItem, 'fo')
        self.assertRaises(KeyError, getItem, 'b')
        self.assertEqual(d['bb'], 'bbe')
        self.assertEqual(d['bc'], 'bcd')
        self.assertEqual(d['a'], 'abc')
        self.assertEqual(d['ab'], 'abc')
        self.assertEqual(d['fool'], 'fool')
        self.assertEqual(d['foo'], 'foo')

    def testSoundex(self):
        L = [('Euler', 'E460'),
             ('Ellery', 'E460'),
             ('Gauss', 'G200'),
             ('Ghosh', 'G200'),
             ('Hilbert', 'H416'),
             ('Heilbronn', 'H416'),
             ('Knuth', 'K530'),
             ('Kant', 'K530'),
             ('Lloyd', 'L300'),
             ('Ladd', 'L300'),
             ('Lukasiewicz', 'L222'),
             ('Lissajous', 'L222')]
        for (name, key) in L:
            soundex = utils.soundex(name)
            self.assertEqual(soundex, key,
                             '%s was %s, not %s' % (name, soundex, key))

    def testDQRepr(self):
        L = [('foo', '"foo"'),
             ('foo\'bar', '"foo\'bar"'),
             ('foo"bar', '"foo\\"bar"'),
             ('"', '"\\""'),
             ('', '""'),
             ('\x00', '"\\x00"')]
        for (s, r) in L:
            self.assertEqual(r, utils.dqrepr(s))
            self.assertEqual(s, eval(utils.dqrepr(s)))
             
    def testPerlReToPythonRe(self):
        r = utils.perlReToPythonRe('m/foo/')
        self.failUnless(r.search('foo'))
        r = utils.perlReToPythonRe('/foo/')
        self.failUnless(r.search('foo'))
        r = utils.perlReToPythonRe('m/\\//')
        self.failUnless(r.search('/'))

    def testPerlReToReplacer(self):
        f = utils.perlReToReplacer('s/foo/bar/')
        self.assertEqual(f('foobarbaz'), 'barbarbaz')
        f = utils.perlReToReplacer('s/fool/bar/')
        self.assertEqual(f('foobarbaz'), 'foobarbaz')
        f = utils.perlReToReplacer('s/foo//')
        self.assertEqual(f('foobarbaz'), 'barbaz')
        f = utils.perlReToReplacer('s/ba//')
        self.assertEqual(f('foobarbaz'), 'foorbaz')
        f = utils.perlReToReplacer('s/ba//g')
        self.assertEqual(f('foobarbaz'), 'foorz')
        f = utils.perlReToReplacer('s/ba\\///g')
        self.assertEqual(f('fooba/rba/z'), 'foorz')