Refactor and optimise some tests (#245)

* Rename to follow actual directory name

* Remove unnecessary Reddit call from test

* Refactor test to reduce duplication

* Parameterise some tests

* Standardise formatting

bulkredditdownloader/tests/site_downloaders/test_redgifs.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python3
+# coding=utf-8
+
+from unittest.mock import Mock
+
+import pytest
+
+from bulkredditdownloader.resource import Resource
+from bulkredditdownloader.site_downloaders.redgifs import Redgifs
+
+
+@pytest.mark.online
+@pytest.mark.parametrize(('test_url', 'expected'), (
+    ('https://redgifs.com/watch/frighteningvictorioussalamander',
+     'https://thumbs2.redgifs.com/FrighteningVictoriousSalamander.mp4'),
+    ('https://redgifs.com/watch/springgreendecisivetaruca',
+     'https://thumbs2.redgifs.com/SpringgreenDecisiveTaruca.mp4'),
+))
+def test_get_link(test_url: str, expected: str):
+    result = Redgifs._get_link(test_url)
+    assert result == expected
+
+
+@pytest.mark.online
+@pytest.mark.parametrize(('test_url', 'expected_hash'), (
+    ('https://redgifs.com/watch/frighteningvictorioussalamander', '4007c35d9e1f4b67091b5f12cffda00a'),
+    ('https://redgifs.com/watch/springgreendecisivetaruca', '8dac487ac49a1f18cc1b4dabe23f0869'),
+))
+def test_download_resource(test_url: str, expected_hash: str):
+    mock_submission = Mock()
+    mock_submission.url = test_url
+    test_site = Redgifs(mock_submission)
+    resources = test_site.find_resources()
+    assert len(resources) == 1
+    assert isinstance(resources[0], Resource)
+    resources[0].download()
+    assert resources[0].hash.hexdigest() == expected_hash