Implement a shutdown test, mostly

test/cmake/Basics.cmake

@@ -137,8 +137,13 @@ add_python_test(
 )
 
 add_python_test(
-    NAME "Core can shut down internally"
-    TEST_MODULE ""
+    NAME "Core can shut down"
+    TEST_MODULE basics.core_can_shut_down
+    NDS_SYSFILES
+    TIMEOUT 30
+    DISABLED
+    # Failure is expected, as the frontend will shut down
+    # (But segfaults or timeouts are still actual failures)
 )
 
 add_python_test(

test/python/basics/core_can_shut_down.py

@@ -0,0 +1,42 @@
+import itertools
+from typing import cast
+
+from libretro import Session
+from libretro.api.input import DeviceIdJoypad
+from libretro.api.video import SoftwareVideoState
+
+import prelude
+
+
+def generate_input():
+    # Wait for intro to finish
+    yield from itertools.repeat(None, 240)
+
+    # Go to NDS main menu and wait for it to appear
+    yield DeviceIdJoypad.A
+    yield from itertools.repeat(None, 59)
+
+    # Select the options menu and wait for the cursor to move
+    yield DeviceIdJoypad.DOWN
+    yield from itertools.repeat(None, 29)
+
+    # Go to the options menu and wait for it to appear
+    yield DeviceIdJoypad.A
+    yield from itertools.repeat(None, 179)
+
+    # Exit the options menu and wait for the window to appear
+    yield DeviceIdJoypad.B
+    yield from itertools.repeat(None, 29)
+
+    # Confirm the exit (exiting the NDS options menu shuts down the console)
+    yield DeviceIdJoypad.A
+    yield from itertools.repeat(None)
+
+
+session: Session
+with prelude.session(input_state=generate_input) as session:
+    video = cast(SoftwareVideoState, session.video)
+    for i in range(600):
+        session.core.run()
+
+    assert session.is_shutdown