nightly vm test: the builder's meta build finds a prebuilt agent in an offline store

hive-meta-flake/src/lib.rs

@@ -543,6 +543,29 @@ mod tests {
         .unwrap()
     }
 
+    /// `testdata/meta-flake.nix.in` is the flake `nix/vm-tests/swarm-builder-offline.nix`
+    /// evaluates and serves, with `@HYPERHIVE_URL@` where the pin goes. It must be
+    /// what [`render_flake`] renders for one archetype agent.
+    #[test]
+    fn the_vm_test_fixture_is_what_render_flake_renders() {
+        let archetype = ArchetypeRef {
+            source: "hyperhive".to_owned(),
+            name: "reviewer".to_owned(),
+        };
+        let flake = render_flake(
+            "@HYPERHIVE_URL@",
+            &[spec("rev1", Some(archetype), None)],
+            &[],
+            false,
+        )
+        .unwrap();
+        assert_eq!(
+            flake,
+            include_str!("../testdata/meta-flake.nix.in"),
+            "update the fixture to the rendered flake"
+        );
+    }
+
     #[test]
     fn a_rendered_flake_names_the_commit_each_input_is_pinned_to() {
         let flake = rendered();