feat(server): overview LiveView with status ampel + pubsub updates

server/test/server_web/live/overview_live_test.exs

@@ -0,0 +1,64 @@
+defmodule ServerWeb.OverviewLiveTest do
+  use ServerWeb.ConnCase, async: false
+
+  import Phoenix.LiveViewTest
+  alias Server.{Hosts, Metrics}
+
+  defp auth(conn), do: Plug.Test.init_test_session(conn, %{authenticated: true})
+
+  describe "mount" do
+    test "redirects to /login when unauthenticated", %{conn: conn} do
+      assert {:error, {:redirect, %{to: "/login"}}} = live(conn, "/")
+    end
+
+    test "renders a card for each host", %{conn: conn} do
+      {:ok, {_h1, _}} = Hosts.create_host("pve-01")
+      {:ok, {_h2, _}} = Hosts.create_host("pve-02")
+
+      {:ok, _view, html} = live(auth(conn), "/")
+
+      assert html =~ "pve-01"
+      assert html =~ "pve-02"
+
+      assert length(Floki.find(Floki.parse_document!(html), "[data-role=host-card]")) == 2
+    end
+
+    test "reflects :critical status for a degraded pool", %{conn: conn} do
+      {:ok, {host, _}} = Hosts.create_host("pve-01")
+      {:ok, _} = Hosts.mark_online(host, "0.1.0")
+
+      payload = %{
+        "zfs_pools" => %{
+          "pools" => [%{"name" => "rpool", "health" => "DEGRADED", "capacity_percent" => 40}]
+        }
+      }
+
+      {:ok, _} = Metrics.record_sample(host.id, "fast", DateTime.utc_now(), payload)
+
+      {:ok, _view, html} = live(auth(conn), "/")
+
+      assert html =~ ~r/data-status=\"critical\"/
+    end
+  end
+
+  describe "pubsub" do
+    test "updates the card when a new metric arrives", %{conn: conn} do
+      {:ok, {host, _}} = Hosts.create_host("pve-01")
+      {:ok, _} = Hosts.mark_online(host, "0.1.0")
+
+      {:ok, view, _html} = live(auth(conn), "/")
+      assert render(view) =~ ~r/data-status=\"ok\"/
+
+      payload = %{
+        "zfs_pools" => %{
+          "pools" => [%{"name" => "rpool", "health" => "DEGRADED", "capacity_percent" => 40}]
+        }
+      }
+
+      {:ok, _} = Metrics.record_sample(host.id, "fast", DateTime.utc_now(), payload)
+
+      Process.sleep(50)
+      assert render(view) =~ ~r/data-status=\"critical\"/
+    end
+  end
+end