Guard Duke grants using public capture uncertainty

tests/ecaz-alliance-engine.test.ts

@@ -281,15 +281,26 @@ void test('Advanced new-ally Duke grant transfers available shared custody while
       assert.deepEqual(done.dukeVidal!.leader, duke!.leader);
     }
   }
-  const g = fixture(true);
-  g.players[2] = newPlayer('a', 'Harkonnen', 'harkonnen');
-  const entered = enter(g);
-  assert.ok(viewGame(entered, 'ec').ambassadorEntry!.dukeAcquisition!.blocked);
-  assert.equal(
-    viewGame(entered, 'ec').ambassadorEntry!.allianceOffer!.blocked,
-    null,
-  );
-  assert.equal(seat(answer(propose(entered), true), 'ec').ally, 'in');
+  for (const uncertainty of [false, true, undefined] as const) {
+    const g = fixture(true);
+    g.players[2] = newPlayer('a', 'Harkonnen', 'harkonnen');
+    if (uncertainty === undefined) delete g.dukeCaptureUncertain;
+    else g.dukeCaptureUncertain = uncertainty;
+    const duke = json(g).dukeVidal;
+    const entered = enter(g);
+    const entry = viewGame(entered, 'ec').ambassadorEntry!;
+    if (uncertainty === false) assert.equal(entry.dukeAcquisition!.blocked, null);
+    else assert.match(entry.dukeAcquisition!.blocked!, /Harkonnen capture history may be unresolved/);
+    assert.equal(entry.allianceOffer!.blocked, null);
+    const done = answer(propose(entered), true);
+    assert.equal(seat(done, 'ec').ally, 'in');
+    assert.equal(seat(done, 'in').ally, 'ec');
+    if (uncertainty === false) {
+      assert.equal(done.dukeVidal!.controller, 'in');
+      assert.equal(done.dukeVidal!.source, 'ally');
+      assert.deepEqual(done.dukeVidal!.leader, duke!.leader);
+    } else assert.deepEqual(done.dukeVidal, duke, 'An uncertain loan leaves the physical Duke unchanged.');
+  }
 });
 
 void test('changing BG private prediction and unrelated private hands does not change the public alliance offer', () => {