Tests

import unittest

from os import path, remove
from copy import deepcopy
from cache import Cache
import random
import string


class TestCache(unittest.TestCase):

    def setUp(self):
        """Set up test fixtures, if any."""
        self.test_file = 'test.json'
        self.default_data = {
            'node1': {
                'test1': 123,
                'test2': 123,
            },
            'node2': {
                'options': {
                    'background': 'white',
                    'foreground': 'black',
                },
                'settings': {
                    'user': 'Dan',
                }
            }
        }
        self.cache = Cache(**self.default_data)

    def tearDown(self):
        """Tear down test fixtures, if any."""
        self.cache.destroy()
        if path.exists(self.test_file):
            remove(self.test_file)

    def test_destroy(self):
        # Action
        self.assertEqual(self.cache.get('node1/test1'), 123)
        self.cache.destroy()

        # Asert
        self.assertEqual(self.cache.get(), {})

    def test_save(self):
        # Action
        self.cache.save(self.test_file)
        self.cache.destroy()
        self.assertEqual(self.cache.get(), {})
        self.cache.load(self.test_file)

        # Asert
        self.assertEqual(self.cache.get('node1/test1'), 123)

    def test_load(self):
        # Action
        self.cache.save(self.test_file)
        self.cache.destroy()
        self.cache.load(self.test_file)

        # Asert
        self.assertEqual(self.cache.get('node1/test1'), 123)

    def test_copy(self):
        # Action
        new_cache = self.cache.copy()

        # Asert
        self.assertTrue(self.cache is not new_cache)
        self.assertEqual(self.cache.get(), new_cache.get())

    def test_merge(self):
        # Assume
        self.cache.destroy()
        self.cache.set('abc/test1', 123)
        new_cache = Cache('abc/test2', 456)

        merged_cache = Cache(**{'abc': {'test1': 123, 'test2': 456}})

        # Action
        self.cache.merge(new_cache)

        # Asert
        self.assertTrue(self.cache is not new_cache)
        self.assertEqual(self.cache.get(), merged_cache.get())

        # Assume
        self.cache.destroy()
        self.cache.set('abc/test1', 123)
        new_cache = Cache({'abc': 100})

        merged_cache = Cache({'abc': 100})

        # Action
        self.cache.merge(new_cache)

        # Asert
        self.assertTrue(self.cache is not new_cache)
        self.assertEqual(self.cache.get(), merged_cache.get())

    def test_remove(self):
        # Action
        self.assertEqual(self.cache.get('node1/test1'), 123)
        self.cache.remove('node1/test1')
        self.cache.remove('node2/options/background')

        # Asert
        self.assertIsNone(self.cache.get('node1/test1'))
        self.assertIsNone(self.cache.get('node2/options/background'))

    def test_exists(self):
        # Action
        self.assertEqual(self.cache.get('node1/test1'), 123)

        # Asert
        self.assertTrue(self.cache.exists('node1/test1'))

    def test_not_exists(self):
        # Asert
        key = ''.join(random.choice(string.ascii_lowercase) for i in range(10))

        self.assertFalse(self.cache.exists(key))

    def test_has_nodes(self):
        # Asert
        self.assertTrue(self.cache.has_nodes())
        self.cache.destroy()
        self.assertFalse(self.cache.has_nodes())

    def test_equality(self):
        # Action
        new_cache = Cache(**deepcopy(self.cache.get()))

        # Asert
        a, b = self.cache, new_cache
        self.assertEqual(a, b)
        self.assertEqual(b, a)
        self.assertTrue(a == b)
        self.assertTrue(b == a)
        self.assertFalse(a != b)
        self.assertFalse(b != a)

    def test_inequality(self):
        # Action
        new_cache = Cache(**self.default_data)
        new_cache.remove('node1')

        # Asert
        a, b = self.cache, new_cache
        self.assertNotEqual(a, b)
        self.assertNotEqual(b, a)
        self.assertFalse(a == b)
        self.assertFalse(b == a)
        self.assertTrue(a != b)
        self.assertTrue(b != a)