test: GraphQL Schedule resolver create/update/delete success and error branches

test/towerops_web/graphql/resolvers/happy_path_test.exs

@@ -16,6 +16,63 @@ defmodule ToweropsWeb.GraphQL.Resolvers.HappyPathTest do
     %{user: user, org: org, ctx: %{context: %{organization_id: org.id, user: user}}}
   end
 
+  describe "Schedule (success/error branches)" do
+    test "create/3 returns the new schedule on success", %{ctx: ctx} do
+      input = %{name: "Primary On-Call", description: "24/7", timezone: "Etc/UTC"}
+      assert {:ok, schedule} = Resolvers.Schedule.create(nil, %{input: input}, ctx)
+      assert schedule.name == "Primary On-Call"
+    end
+
+    test "create/3 with invalid input returns formatted error", %{ctx: ctx} do
+      # name is required
+      assert {:error, msg} = Resolvers.Schedule.create(nil, %{input: %{name: ""}}, ctx)
+      assert is_binary(msg)
+    end
+
+    test "update/3 succeeds on a real schedule", %{ctx: ctx, org: org} do
+      {:ok, schedule} =
+        Towerops.OnCall.create_schedule(%{
+          name: "Original",
+          timezone: "Etc/UTC",
+          organization_id: org.id
+        })
+
+      assert {:ok, updated} =
+               Resolvers.Schedule.update(nil, %{id: schedule.id, input: %{name: "Renamed"}}, ctx)
+
+      assert updated.name == "Renamed"
+    end
+
+    test "update/3 with invalid input on a real schedule returns formatted error", %{
+      ctx: ctx,
+      org: org
+    } do
+      {:ok, schedule} =
+        Towerops.OnCall.create_schedule(%{
+          name: "Pre-update",
+          timezone: "Etc/UTC",
+          organization_id: org.id
+        })
+
+      assert {:error, msg} =
+               Resolvers.Schedule.update(nil, %{id: schedule.id, input: %{name: ""}}, ctx)
+
+      assert is_binary(msg)
+    end
+
+    test "delete/3 succeeds on a real schedule", %{ctx: ctx, org: org} do
+      {:ok, schedule} =
+        Towerops.OnCall.create_schedule(%{
+          name: "Doomed",
+          timezone: "Etc/UTC",
+          organization_id: org.id
+        })
+
+      assert {:ok, %{success: true}} =
+               Resolvers.Schedule.delete(nil, %{id: schedule.id}, ctx)
+    end
+  end
+
   describe "Member" do
     test "invite/3 creates an invitation", %{ctx: ctx} do
       assert {:ok, invitation} =