[Enhancement] Add pagination for a source's media (#190)

* [WIP] added first attempt at pagination component

* Hooked up pagination for downloaded media

test/pinchflat/utils/number_utils_test.exs

@@ -0,0 +1,19 @@
+defmodule Pinchflat.Utils.NumberUtilsTest do
+  use ExUnit.Case, async: true
+
+  alias Pinchflat.Utils.NumberUtils
+
+  describe "clamp/3" do
+    test "returns the minimum when the number is less than the minimum" do
+      assert NumberUtils.clamp(1, 2, 3) == 2
+    end
+
+    test "returns the maximum when the number is greater than the maximum" do
+      assert NumberUtils.clamp(4, 2, 3) == 3
+    end
+
+    test "returns the number when it is between the minimum and maximum" do
+      assert NumberUtils.clamp(2, 1, 3) == 2
+    end
+  end
+end

test/pinchflat_web/controllers/sources/media_item_table_live_test.exs

@@ -0,0 +1,60 @@
+defmodule PinchflatWeb.Sources.MediaItemTableLiveTest do
+  use PinchflatWeb.ConnCase
+
+  import Phoenix.LiveViewTest
+  import Pinchflat.MediaFixtures
+  import Pinchflat.SourcesFixtures
+
+  alias Pinchflat.Sources.MediaItemTableLive
+
+  setup do
+    source = source_fixture()
+
+    {:ok, source: source}
+  end
+
+  describe "initial rendering" do
+    test "shows message when no records", %{conn: conn, source: source} do
+      {:ok, _view, html} = live_isolated(conn, MediaItemTableLive, session: create_session(source))
+
+      assert html =~ "Nothing Here!"
+      refute html =~ "Showing"
+    end
+
+    test "shows records when present", %{conn: conn, source: source} do
+      media_item = media_item_fixture(source_id: source.id, media_filepath: nil)
+
+      {:ok, _view, html} = live_isolated(conn, MediaItemTableLive, session: create_session(source))
+
+      assert html =~ "Showing 1 of 1"
+      assert html =~ "Title"
+      assert html =~ media_item.title
+    end
+  end
+
+  describe "media_state" do
+    test "shows pending media when pending", %{conn: conn, source: source} do
+      downloaded_media_item = media_item_fixture(source_id: source.id)
+      pending_media_item = media_item_fixture(source_id: source.id, media_filepath: nil)
+
+      {:ok, _view, html} = live_isolated(conn, MediaItemTableLive, session: create_session(source, "pending"))
+
+      assert html =~ pending_media_item.title
+      refute html =~ downloaded_media_item.title
+    end
+
+    test "shows downloaded media when downloaded", %{conn: conn, source: source} do
+      downloaded_media_item = media_item_fixture(source_id: source.id)
+      pending_media_item = media_item_fixture(source_id: source.id, media_filepath: nil)
+
+      {:ok, _view, html} = live_isolated(conn, MediaItemTableLive, session: create_session(source, "downloaded"))
+
+      assert html =~ downloaded_media_item.title
+      refute html =~ pending_media_item.title
+    end
+  end
+
+  defp create_session(source, media_state \\ "pending") do
+    %{"source_id" => source.id, "media_state" => media_state}
+  end
+end