feat(server): pure Status.compute/2 for ok/warning/critical/offline

server/test/server/status_test.exs

@@ -0,0 +1,61 @@
+defmodule Server.StatusTest do
+  use ExUnit.Case, async: true
+
+  alias Server.Status
+
+  describe "compute/2" do
+    test "returns :offline when host status is offline, regardless of payload" do
+      assert Status.compute("offline", %{"zfs_pools" => %{"pools" => [healthy_pool()]}}) ==
+               :offline
+    end
+
+    test "returns :ok with all-healthy payload" do
+      payload = %{
+        "zfs_pools" => %{"pools" => [healthy_pool()]},
+        "system_info" => %{"pending_updates" => 0}
+      }
+
+      assert Status.compute("online", payload) == :ok
+    end
+
+    test "returns :critical for degraded pool" do
+      payload = %{"zfs_pools" => %{"pools" => [Map.put(healthy_pool(), "health", "DEGRADED")]}}
+      assert Status.compute("online", payload) == :critical
+    end
+
+    test "returns :critical for pool capacity > 90" do
+      payload = %{"zfs_pools" => %{"pools" => [Map.put(healthy_pool(), "capacity_percent", 95)]}}
+      assert Status.compute("online", payload) == :critical
+    end
+
+    test "returns :warning for pool capacity 80..90" do
+      payload = %{"zfs_pools" => %{"pools" => [Map.put(healthy_pool(), "capacity_percent", 85)]}}
+      assert Status.compute("online", payload) == :warning
+    end
+
+    test "returns :warning for pending OS updates > 0" do
+      payload = %{
+        "zfs_pools" => %{"pools" => [healthy_pool()]},
+        "system_info" => %{"pending_updates" => 3}
+      }
+
+      assert Status.compute("online", payload) == :warning
+    end
+
+    test "returns :ok when payload is nil (never-seen host) but host is online" do
+      assert Status.compute("online", nil) == :ok
+    end
+
+    test "treats never_connected like offline" do
+      assert Status.compute("never_connected", nil) == :offline
+    end
+  end
+
+  defp healthy_pool do
+    %{
+      "name" => "rpool",
+      "health" => "ONLINE",
+      "capacity_percent" => 40
+    }
+  end
+end