1 files changed, 37 insertions, 0 deletions
diff --git a/src/simulation/postprocess.test.js b/src/simulation/postprocess.test.js
new file mode 100644
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+++ b/src/simulation/postprocess.test.js
@@ -0,0 +1,37 @@
+'use strict';
+
+import { world_update } from '../world/world.js';
+import { postprocess } from './postprocess.js';
+
+test("agents freeze when finishing on a mutable or active", () => {
+  const agent = {
+    id: 1,
+    net: { compute: () => [[1], null] },
+    state: null,
+    x: 0, y: 0,
+    flags: {},
+  };
+
+  const lattice = [[{ type: 'empty', flags: {} }]];
+  
+  const world = {
+    lattice,
+    lattice_rules: { empty: ()=>{}, active: ()=>{}, mutable: ()=>{} },
+    agents: [agent],
+    senses: [],
+    actions: [],
+    validity: [],
+  };
+
+  expect(world_update(world, postprocess).agents[0]).toEqual(agent);
+  world.lattice[0][0].type = 'mutable';
+  expect(world_update(world, postprocess).agents[0]).toEqual({
+    ...agent,
+    flags: { frozen: true },
+  });
+  world.lattice[0][0].type = 'active';
+  expect(world_update(world, postprocess).agents[0]).toEqual({
+    ...agent,
+    flags: { frozen: true },
+  });
+});