Add DiscogsTest

test/discogs_test.exs

@@ -0,0 +1,20 @@
+defmodule DiscogsTest do
+  use ExUnit.Case, async: true
+
+  alias Discogs.Fixtures
+
+  describe "get_artist/1" do
+    test "it returns the artist" do
+      discogs_id = "discogs_id"
+
+      expected_info =
+        Fixtures.Artist.get_artist()
+
+      Req.Test.stub(Discogs.API, fn conn = %{request_path: "/artists/discogs_id"} ->
+        Req.Test.json(conn, Fixtures.Artist.get_artist())
+      end)
+
+      assert {:ok, expected_info} == Discogs.get_artist(discogs_id)
+    end
+  end
+end