Updated source's friendly_name to default to the collection_name (#29)

test/pinchflat/sources_test.exs

@@ -59,6 +59,35 @@ defmodule Pinchflat.SourcesTest do
       assert String.starts_with?(source.collection_id, "some_playlist_id_")
     end
 
+    test "you can specify a custom friendly_name" do
+      expect(YtDlpRunnerMock, :run, &runner_function_mock/3)
+
+      valid_attrs = %{
+        media_profile_id: media_profile_fixture().id,
+        original_url: "https://www.youtube.com/channel/abc123",
+        collection_type: "channel",
+        friendly_name: "some custom name"
+      }
+
+      assert {:ok, %Source{} = source} = Sources.create_source(valid_attrs)
+
+      assert source.friendly_name == "some custom name"
+    end
+
+    test "friendly name is pulled from collection_name if not specified" do
+      expect(YtDlpRunnerMock, :run, &runner_function_mock/3)
+
+      valid_attrs = %{
+        media_profile_id: media_profile_fixture().id,
+        original_url: "https://www.youtube.com/channel/abc123",
+        collection_type: "channel"
+      }
+
+      assert {:ok, %Source{} = source} = Sources.create_source(valid_attrs)
+
+      assert source.friendly_name == "some channel name"
+    end
+
     test "creation with invalid data returns error changeset" do
       assert {:error, %Ecto.Changeset{}} = Sources.create_source(@invalid_source_attrs)
     end

test/pinchflat/utils/changeset_utils_test.exs

@@ -0,0 +1,33 @@
+defmodule Pinchflat.Utils.ChangesetUtilsTest do
+  use ExUnit.Case, async: true
+
+  defmodule MockSchema do
+    use Ecto.Schema
+    import Ecto.Changeset
+    import Pinchflat.Utils.ChangesetUtils
+
+    schema "mock_schemas" do
+      field :title, :string
+    end
+
+    def changeset(data, attrs) do
+      data
+      |> cast(attrs, [:title])
+      |> dynamic_default(:title, fn _ -> "default" end)
+    end
+  end
+
+  describe "dynamic_default/3" do
+    test "sets the default value if the field is nil" do
+      changeset = MockSchema.changeset(%MockSchema{}, %{})
+
+      assert Ecto.Changeset.get_change(changeset, :title) == "default"
+    end
+
+    test "does not set the default value if the field is not nil" do
+      changeset = MockSchema.changeset(%MockSchema{}, %{title: "custom"})
+
+      assert Ecto.Changeset.get_change(changeset, :title) == "custom"
+    end
+  end
+end