Fix RFC822 filters + More tests (#257)

* Make rfc822 filters compatible with Windows systems.

.strftime() is relative to the system it's being run on.
UNIX has '%s' for seconds since the EPOCH, Windows doesn't (ValueError).
Solution: use .timestamp() to achieve the same result on both platforms.
This also allows us to drop the float() around it, since it returns a float.

* Start testing filters

* Add placeholders for more tests

* Make 'tests' folder a Python package

Now you can run tests with just `pytest tests`

* Update readme and travis config

* Test timesince()

* Update and organize .gitignore

Deleted: (nothing)
Added: Coverage files, .idea\

* Test filter_truthy, category_name

* Tests for backend.py

* Tests for bencode.py

* Move (empty) test_models.py to tests package

* Tests for utils.py

* Fixes for flattenDict

* Change name to `flatten_dict`
* `newkey` was assigned but never used

* Add a helper class for testing

* Show coverage on Travis

(only Travis for now...)

* Remove IDE

* Use correct assert functions

* Update README.md

tests/test_utils.py

@@ -0,0 +1,115 @@
+import unittest
+from collections import OrderedDict
+
+from hashlib import sha1
+from nyaa import utils
+
+
+class TestUtils(unittest.TestCase):
+
+    def test_sha1_hash(self):
+        bencoded_test_data = b'd5:hello5:world7:numbersli1ei2eee'
+        self.assertEqual(
+            utils.sha1_hash(bencoded_test_data),
+            sha1(bencoded_test_data).digest())
+
+    def test_sorted_pathdict(self):
+        initial = {
+            'api_handler.py': 11805,
+            'routes.py': 34247,
+            '__init__.py': 6499,
+            'torrents.py': 11948,
+            'static': {
+                'img': {
+                    'nyaa.png': 1200,
+                    'sukebei.png': 1100,
+                },
+                'js': {
+                    'main.js': 3000,
+                },
+            },
+            'search.py': 5148,
+            'models.py': 24293,
+            'templates': {
+                'upload.html': 3000,
+                'home.html': 1200,
+                'layout.html': 23000,
+            },
+            'utils.py': 14700,
+        }
+        expected = OrderedDict({
+            'static': OrderedDict({
+                'img': OrderedDict({
+                    'nyaa.png': 1200,
+                    'sukebei.png': 1100,
+                }),
+                'js': OrderedDict({
+                    'main.js': 3000,
+                }),
+            }),
+            'templates': OrderedDict({
+                'home.html': 1200,
+                'layout.html': 23000,
+                'upload.html': 3000,
+            }),
+            '__init__.py': 6499,
+            'api_handler.py': 11805,
+            'models.py': 24293,
+            'routes.py': 34247,
+            'search.py': 5148,
+            'torrents.py': 11948,
+            'utils.py': 14700,
+        })
+        self.assertDictEqual(utils.sorted_pathdict(initial), expected)
+
+    @unittest.skip('Not yet implemented')
+    def test_cached_function(self):
+        # TODO: Test with a function that generates something random?
+        pass
+
+    def test_flatten_dict(self):
+        initial = OrderedDict({
+            'static': OrderedDict({
+                'img': OrderedDict({
+                    'nyaa.png': 1200,
+                    'sukebei.png': 1100,
+                }),
+                'js': OrderedDict({
+                    'main.js': 3000,
+                }),
+                'favicon.ico': 1000,
+            }),
+            'templates': [
+                {'home.html': 1200},
+                {'layout.html': 23000},
+                {'upload.html': 3000},
+            ],
+            '__init__.py': 6499,
+            'api_handler.py': 11805,
+            'models.py': 24293,
+            'routes.py': 34247,
+            'search.py': 5148,
+            'torrents.py': 11948,
+            'utils.py': 14700,
+        })
+        expected = {
+            'static/img/nyaa.png': 1200,
+            'static/img/sukebei.png': 1100,
+            'static/js/main.js': 3000,
+            'static/favicon.ico': 1000,
+            'templates/home.html': 1200,
+            'templates/layout.html': 23000,
+            'templates/upload.html': 3000,
+            '__init__.py': 6499,
+            'api_handler.py': 11805,
+            'models.py': 24293,
+            'routes.py': 34247,
+            'search.py': 5148,
+            'utils.py': 14700,
+            'torrents.py': 11948,
+        }
+        self.assertDictEqual(utils.flatten_dict(initial), expected)
+
+
+if __name__ == '__main__':
+    unittest.main()