Refactor modules into contexts (#78)

* [WIP] break out a few contexts, start refactoring fast index modules

* [WIP] more contexts, this time around slow indexing and downloads

* [WIP] got all tests passing

* [WIP] Added moduledocs

* Built a genserver to rename old jobs on boot

* Added a module naming check; moved things around

* Fixed specs

test/pinchflat/fast_indexing/youtube_rss_test.exs

@@ -0,0 +1,79 @@
+defmodule Pinchflat.FastIndexing.YoutubeRssTest do
+  use Pinchflat.DataCase
+  import Mox
+  import Pinchflat.SourcesFixtures
+
+  alias Pinchflat.FastIndexing.YoutubeRss
+
+  setup :verify_on_exit!
+
+  setup do
+    source = source_fixture()
+
+    {:ok, source: source}
+  end
+
+  describe "get_recent_media_ids_from_rss/1" do
+    test "calls the expected URL for channel sources" do
+      source = source_fixture(collection_type: :channel, collection_id: "channel_id")
+
+      expect(HTTPClientMock, :get, fn url ->
+        assert url =~ "https://www.youtube.com/feeds/videos.xml?channel_id=#{source.collection_id}"
+
+        {:ok, ""}
+      end)
+
+      assert {:ok, _} = YoutubeRss.get_recent_media_ids_from_rss(source)
+    end
+
+    test "calls the expected URL for playlist sources" do
+      source = source_fixture(collection_type: :playlist, collection_id: "playlist_id")
+
+      expect(HTTPClientMock, :get, fn url ->
+        assert url =~ "https://www.youtube.com/feeds/videos.xml?playlist_id=#{source.collection_id}"
+
+        {:ok, ""}
+      end)
+
+      assert {:ok, _} = YoutubeRss.get_recent_media_ids_from_rss(source)
+    end
+
+    test "returns an error if the HTTP request fails", %{source: source} do
+      expect(HTTPClientMock, :get, fn _url -> {:error, ""} end)
+
+      assert {:error, "Failed to fetch RSS feed"} = YoutubeRss.get_recent_media_ids_from_rss(source)
+    end
+
+    test "returns the media IDs from the RSS feed", %{source: source} do
+      expect(HTTPClientMock, :get, fn _url ->
+        {:ok, "<yt:videoId>test_1</yt:videoId><yt:videoId>test_2</yt:videoId>"}
+      end)
+
+      assert {:ok, ["test_1", "test_2"]} = YoutubeRss.get_recent_media_ids_from_rss(source)
+    end
+
+    test "strips whitespace from media IDs", %{source: source} do
+      expect(HTTPClientMock, :get, fn _url ->
+        {:ok, "<yt:videoId> test_1 </yt:videoId><yt:videoId> test_2 </yt:videoId>"}
+      end)
+
+      assert {:ok, ["test_1", "test_2"]} = YoutubeRss.get_recent_media_ids_from_rss(source)
+    end
+
+    test "removes empty media IDs", %{source: source} do
+      expect(HTTPClientMock, :get, fn _url ->
+        {:ok, "<yt:videoId>test_1</yt:videoId><yt:videoId></yt:videoId>"}
+      end)
+
+      assert {:ok, ["test_1"]} = YoutubeRss.get_recent_media_ids_from_rss(source)
+    end
+
+    test "removes duplicate media IDs", %{source: source} do
+      expect(HTTPClientMock, :get, fn _url ->
+        {:ok, "<yt:videoId>test_1</yt:videoId><yt:videoId>test_1</yt:videoId>"}
+      end)
+
+      assert {:ok, ["test_1"]} = YoutubeRss.get_recent_media_ids_from_rss(source)
+    end
+  end
+end