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_vreddit.py

@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+# coding=utf-8
+
+import praw
+import pytest
+
+from bulkredditdownloader.resource import Resource
+from bulkredditdownloader.site_downloaders.vreddit import VReddit
+
+
+@pytest.mark.online
+@pytest.mark.reddit
+@pytest.mark.parametrize(('test_submission_id', 'expected_hash'), (
+    ('lu8l8g', '93a15642d2f364ae39f00c6d1be354ff'),
+))
+def test_find_resources(test_submission_id: str, expected_hash: str, reddit_instance: praw.Reddit):
+    test_submission = reddit_instance.submission(id=test_submission_id)
+    downloader = VReddit(test_submission)
+    resources = downloader.find_resources()
+    assert len(resources) == 1
+    assert isinstance(resources[0], Resource)
+    resources[0].download()
+    assert resources[0].hash.hexdigest() == expected_hash