Add test case for placement

test/uplink/packages/instance/placement_test.exs

@@ -1,9 +1,73 @@
 defmodule Uplink.Packages.Instance.PlacementTest do
   use ExUnit.Case
 
+  import Uplink.Scenarios.Deployment
+
   alias Uplink.Packages.Instance.Placement
 
+  setup [:setup_endpoints, :setup_base]
+
   test "name" do
     assert Placement.name("instellar-0e43123-01") == "instellar-0e43123"
   end
+
+  describe "spread placement" do
+    setup do
+      node_name = "instellar-0e43123-01"
+
+      existing_instances =
+        File.read!("test/fixtures/lxd/instances/list/existing.json")
+
+      cluster_members =
+        File.read!("test/fixtures/lxd/cluster/members/list.json")
+
+      {:ok,
+       existing_instances: existing_instances,
+       cluster_members: cluster_members,
+       node_name: node_name}
+    end
+
+    test "calls lxd api when availability is nil", %{
+      bypass: bypass,
+      existing_instances: existing_instances,
+      node_name: node_name
+    } do
+      Bypass.expect_once(bypass, "GET", "/1.0/instances", fn conn ->
+        assert %{"recursion" => "1", "all-projects" => _} = conn.query_params
+
+        conn
+        |> Plug.Conn.put_resp_header("content-type", "application/json")
+        |> Plug.Conn.resp(200, existing_instances)
+      end)
+
+      assert {:ok, %Placement{}} = Placement.find(node_name, "spread")
+    end
+
+    test "fallback to auto when no availability", %{
+      bypass: bypass,
+      existing_instances: existing_instances,
+      cluster_members: cluster_members,
+      node_name: node_name
+    } do
+      placement_name = Placement.name(node_name)
+
+      Uplink.Cache.put({:available_nodes, placement_name}, [])
+
+      Bypass.expect_once(bypass, "GET", "/1.0/instances", fn conn ->
+        assert %{"recursion" => "1", "all-projects" => _} = conn.query_params
+
+        conn
+        |> Plug.Conn.put_resp_header("content-type", "application/json")
+        |> Plug.Conn.resp(200, existing_instances)
+      end)
+
+      Bypass.expect_once(bypass, "GET", "/1.0/cluster/members", fn conn ->
+        conn
+        |> Plug.Conn.put_resp_header("content-type", "application/json")
+        |> Plug.Conn.resp(200, cluster_members)
+      end)
+
+      assert {:ok, %Placement{}} = Placement.find(node_name, "spread")
+    end
+  end
 end