#!/usr/bin/env python

'''Unit tests for cacher_mod'''

import unittest

import dohdbm
import python2x3
import cacher_mod

class test_cacher_mod(unittest.TestCase):
    # pylint: disable=R0904
    # R0904: We're a module inheriting from unittest.TestCase; of course we have lots of public methods
    '''Unit tests for cacher_mod'''

    b_a = python2x3.string_to_binary('a')
    b_b = python2x3.string_to_binary('b')
    b_c = python2x3.string_to_binary('c')
    b_key = python2x3.string_to_binary('key')
    b_key2 = python2x3.string_to_binary('key2')
    b_key3 = python2x3.string_to_binary('key3')
    b_value = python2x3.string_to_binary('value')
    b_value2 = python2x3.string_to_binary('value2')
    b_value3 = python2x3.string_to_binary('value3')
    b_a_doh = python2x3.string_to_binary('a.doh')
    b_b_doh = python2x3.string_to_binary('b.doh')
    b_c_doh = python2x3.string_to_binary('c.doh')

    def test_open_and_close(self):
        '''Test a single file'''
        _unused = self
        cacher = cacher_mod.Database_cacher(max_entries=2)
        cacher[test_cacher_mod.b_a] = dohdbm.open(test_cacher_mod.b_a_doh, 'w')
        cacher[test_cacher_mod.b_a].close()

    def test_open_value_close(self):
        '''Test a single file with a single value'''
        _unused = self
        cacher = cacher_mod.Database_cacher(max_entries=2)
        cacher[test_cacher_mod.b_a] = dohdbm.open(test_cacher_mod.b_a_doh, 'n')
        cacher[test_cacher_mod.b_a][test_cacher_mod.b_key] = test_cacher_mod.b_value
        cacher[test_cacher_mod.b_a].close()

    def test_2_open_value_close(self):
        '''Test 2 files with values'''
        _unused = self
        cacher = cacher_mod.Database_cacher(max_entries=2)
        cacher[test_cacher_mod.b_a] = dohdbm.open(test_cacher_mod.b_a_doh, 'n')
        cacher[test_cacher_mod.b_b] = dohdbm.open(test_cacher_mod.b_b_doh, 'n')
        cacher[test_cacher_mod.b_a][test_cacher_mod.b_key] = test_cacher_mod.b_value
        cacher[test_cacher_mod.b_b][test_cacher_mod.b_key2] = test_cacher_mod.b_value2
        cacher[test_cacher_mod.b_a].close()
        cacher[test_cacher_mod.b_b].close()

    def test_3_open_value_close(self):
        '''Test 3 files with values in a cacher that'll only hold 2 - close the remaining two, one at a time'''
        _unused = self
        cacher = cacher_mod.Database_cacher(max_entries=2)
        assert len(cacher) == 0, len(cacher)  # pylint: disable=len-as-condition
        cacher[test_cacher_mod.b_a] = dohdbm.open(test_cacher_mod.b_a_doh, 'n')
        assert len(cacher) == 1, len(cacher)
        cacher[test_cacher_mod.b_b] = dohdbm.open(test_cacher_mod.b_b_doh, 'n')
        assert len(cacher) == 2, len(cacher)
        cacher[test_cacher_mod.b_c] = dohdbm.open(test_cacher_mod.b_c_doh, 'n')
        assert len(cacher) == 2, len(cacher)
        try:
            cacher[test_cacher_mod.b_a][test_cacher_mod.b_key] = test_cacher_mod.b_value
        except KeyError:
            pass
        else:
            raise AssertionError
        cacher[test_cacher_mod.b_b][test_cacher_mod.b_key2] = test_cacher_mod.b_value2
        cacher[test_cacher_mod.b_c][test_cacher_mod.b_key3] = test_cacher_mod.b_value3
        cacher[test_cacher_mod.b_b].close()
        cacher[test_cacher_mod.b_c].close()

    def test_3_open_value_agg_close(self):
        '''Test 3 files with values in a cacher that'll only hold 2 - close en masse'''
        _unused = self
        cacher = cacher_mod.Database_cacher(max_entries=2)
        assert len(cacher) == 0, len(cacher)  # pylint: disable=len-as-condition
        cacher[test_cacher_mod.b_a] = dohdbm.open(test_cacher_mod.b_a_doh, 'n')
        assert len(cacher) == 1, len(cacher)
        cacher[test_cacher_mod.b_b] = dohdbm.open(test_cacher_mod.b_b_doh, 'n')
        assert len(cacher) == 2, len(cacher)
        cacher[test_cacher_mod.b_c] = dohdbm.open(test_cacher_mod.b_c_doh, 'n')
        assert len(cacher) == 2, len(cacher)
        try:
            cacher[test_cacher_mod.b_a][test_cacher_mod.b_key] = test_cacher_mod.b_value
        except KeyError:
            pass
        else:
            raise AssertionError
        cacher[test_cacher_mod.b_b][test_cacher_mod.b_key2] = test_cacher_mod.b_value2
        cacher[test_cacher_mod.b_c][test_cacher_mod.b_key3] = test_cacher_mod.b_value3
        cacher.close()

    def test_3_open_part_then_agg_close(self):
        '''3 files, two values, close en masse'''
        _unused = self
        cacher = cacher_mod.Database_cacher(max_entries=2)
        assert len(cacher) == 0, len(cacher)  # pylint: disable=len-as-condition
        cacher[test_cacher_mod.b_a] = dohdbm.open(test_cacher_mod.b_a_doh, 'n')
        assert len(cacher) == 1, len(cacher)
        cacher[test_cacher_mod.b_b] = dohdbm.open(test_cacher_mod.b_b_doh, 'n')
        assert len(cacher) == 2, len(cacher)
        cacher[test_cacher_mod.b_c] = dohdbm.open(test_cacher_mod.b_c_doh, 'n')
        assert len(cacher) == 2, len(cacher)
        try:
            cacher[test_cacher_mod.b_a][test_cacher_mod.b_key] = test_cacher_mod.b_value
        except KeyError:
            pass
        else:
            raise AssertionError
        cacher[test_cacher_mod.b_b][test_cacher_mod.b_key2] = test_cacher_mod.b_value2
        cacher.close()

unittest.main()