Lib/test/test_dbm.py

#! /usr/bin/env python
"""Test script for the dbm module
   Roger E. Masse
"""
import os
import dbm
from dbm import error
from test.test_support import verbose, verify, TestSkipped, TESTFN

# make filename unique to allow multiple concurrent tests
# and to minimize the likelihood of a problem from an old file
filename = TESTFN

def cleanup():
    for suffix in ['', '.pag', '.dir', '.db']:
        try:
            os.unlink(filename + suffix)
        except OSError as e:
            (errno, strerror) = e.errno, e.strerror
            # if we can't delete the file because of permissions,
            # nothing will work, so skip the test
            if errno == 1:
                raise TestSkipped('unable to remove: ' + filename + suffix)

def test_keys():
    d = dbm.open(filename, 'c')
    verify(d.keys() == [])
    d[b'a'] = b'b'
    d[b'12345678910'] = b'019237410982340912840198242'
    d.keys()
    if b'a' in d:
        if verbose:
            print('Test dbm keys: ', d.keys())

    d.close()

def test_modes():
    d = dbm.open(filename, 'r')
    d.close()
    d = dbm.open(filename, 'rw')
    d.close()
    d = dbm.open(filename, 'w')
    d.close()
    d = dbm.open(filename, 'n')
    d.close()

def test_main():
    cleanup()
    try:
        test_keys()
        test_modes()
    except:
        cleanup()
        raise

    cleanup()



if __name__ == '__main__':
    test_main()