# -*- coding: utf-8 -*-
from lbrynet.core import utils

from twisted.trial import unittest


class CompareVersionTest(unittest.TestCase):
    def test_compare_versions_isnot_lexographic(self):
        self.assertTrue(utils.version_is_greater_than('0.3.10', '0.3.6'))

    def test_same_versions_return_false(self):
        self.assertFalse(utils.version_is_greater_than('1.3.9', '1.3.9'))

    def test_same_release_is_greater_then_beta(self):
        self.assertTrue(utils.version_is_greater_than('1.3.9', '1.3.9b1'))

    def test_version_can_have_four_parts(self):
        self.assertTrue(utils.version_is_greater_than('1.3.9.1', '1.3.9'))

    def test_release_is_greater_than_rc(self):
        self.assertTrue(utils.version_is_greater_than('1.3.9', '1.3.9rc0'))


class ObfuscationTest(unittest.TestCase):
    def test_deobfuscation_reverses_obfuscation(self):
        plain = "my_test_string"
        obf = utils.obfuscate(plain)
        self.assertEqual(plain, utils.deobfuscate(obf))

    def test_can_use_unicode(self):
        plain = '☃'
        obf = utils.obfuscate(plain)
        self.assertEqual(plain, utils.deobfuscate(obf))


class SafeDictDescendTest(unittest.TestCase):

    def test_safe_dict_descend_happy(self):
        nested = {
            'foo': {
                'bar': {
                    'baz': 3
                }
            }
        }
        self.assertEqual(
            utils.safe_dict_descend(nested, 'foo', 'bar', 'baz'),
            3
        )

    def test_safe_dict_descend_typeerror(self):
        nested = {
            'foo': {
                'bar': 7
            }
        }
        self.assertIsNone(utils.safe_dict_descend(nested, 'foo', 'bar', 'baz'))

    def test_safe_dict_descend_missing(self):
        nested = {
            'foo': {
                'barn': 7
            }
        }
        self.assertIsNone(utils.safe_dict_descend(nested, 'foo', 'bar', 'baz'))

    def test_empty_dict_doesnt_explode(self):
        nested = {}
        self.assertIsNone(utils.safe_dict_descend(nested, 'foo', 'bar', 'baz'))

    def test_identity(self):
        nested = {
            'foo': {
                'bar': 7
            }
        }
        self.assertIs(nested, utils.safe_dict_descend(nested))