From 8dce4b14ce5dfbb51202da187db436a2c253c264 Mon Sep 17 00:00:00 2001
From: Christian Svensson <blue@cmd.nu>
Date: Sat, 17 Oct 2026 13:40:10 +0200
Subject: [PATCH] engine: the flow test fixture names its backend

`FluidStats` gained `backend` in #535 and the fixture of the flow drawing
tests arrived with #550; merged one after the other, the fixture lacks the
field and `cargo test -p fieldcraft-engine` no longer compiles on develop.

Part of #157.
---
 crates/engine/src/flow.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/crates/engine/src/flow.rs b/crates/engine/src/flow.rs
index a932d3a..bc0a8ab 100644
--- a/crates/engine/src/flow.rs
+++ b/crates/engine/src/flow.rs
@@ -437,6 +437,7 @@ pub(crate) mod tests {
             lattice_velocity: 0.1,
             mach: 0.1,
             cell_updates: 0,
+            backend: "cpu".into(),
         };
         FluidResult {
             step: "Flow".into(),