swarm-ui: turn an archetype agent into a custom one from its detail

frontend/packages/swarm-ui/test/agent-types.test.mjs

@@ -3,7 +3,10 @@
 // imported as it is.
 import assert from "node:assert/strict";
 import { test } from "node:test";
-import { showsLoginNeeded } from "../src/agent/AgentTypes.ts";
+import {
+  canTurnIntoCustom,
+  showsLoginNeeded,
+} from "../src/agent/AgentTypes.ts";
 
 test("an agent that says it needs a login gets the badge", () => {
   assert.equal(showsLoginNeeded({ needs_login: true }), true);
@@ -17,3 +20,25 @@ test("an agent that has not said gets none", () => {
   assert.equal(showsLoginNeeded({ needs_login: null }), false);
   assert.equal(showsLoginNeeded({}), false);
 });
+
+test("turn into custom is offered to a placed archetype agent only", () => {
+  const archetype = { source: "hyperhive", name: "reviewer" };
+  assert.equal(
+    canTurnIntoCustom({ archetype, hive: "alpha", wanted: "up" }),
+    true,
+  );
+  // A custom agent has no archetype to turn from.
+  assert.equal(
+    canTurnIntoCustom({ archetype: null, hive: "alpha", wanted: "up" }),
+    false,
+  );
+  // The controller places the conversion on a hive, so one is needed.
+  assert.equal(
+    canTurnIntoCustom({ archetype, hive: null, wanted: "up" }),
+    false,
+  );
+  assert.equal(
+    canTurnIntoCustom({ archetype, hive: "alpha", wanted: "destroyed" }),
+    false,
+  );
+});