Let auto rod control clear shutdown and adjust rods

tests/test_simulation.py

@@ -253,3 +253,17 @@ def test_meltdown_triggers_shutdown():
 
     assert reactor.shutdown is True
     assert reactor.meltdown is True
+
+
+def test_auto_control_resets_shutdown_and_moves_rods():
+    reactor = Reactor.default()
+    state = reactor.initial_state()
+    reactor.shutdown = True
+    reactor.control.manual_control = True
+    reactor.control.rod_fraction = 0.95
+
+    reactor.step(state, dt=1.0, command=ReactorCommand(rod_manual=False))
+
+    assert reactor.shutdown is False
+    assert reactor.control.manual_control is False
+    assert reactor.control.rod_fraction < 0.95