libakgl/tests/controller.c

/**
 * @file controller.c
 * @brief Unit tests for control maps and SDL input dispatch.
 *
 * SDL events are synthesized directly rather than pumped through the event
 * queue, so none of this needs a physical keyboard or gamepad. The device
 * enumeration helpers are exercised against the dummy drivers, where the
 * expected outcome is "no devices, no crash".
 */

#include <SDL3/SDL.h>
#include <string.h>
#include <akerror.h>

#include <akgl/error.h>
// akgl/controller.h uses akgl_Actor without declaring it, so actor.h has to
// come first, the same way src/controller.c reaches it through akgl/game.h.
#include <akgl/actor.h>
#include <akgl/character.h>
#include <akgl/game.h>
#include <akgl/controller.h>
#include <akgl/heap.h>
#include <akgl/registry.h>

#include "testutil.h"

/*
 * akgl/controller.h declares these as akgl_controller_handle_*, but src has
 * always defined them as gamepad_handle_*. Declared here under the names that
 * actually link, so the tests can reach them without renaming shipped symbols.
 */
akerr_ErrorContext *gamepad_handle_button_down(void *appstate, SDL_Event *event);
akerr_ErrorContext *gamepad_handle_button_up(void *appstate, SDL_Event *event);
akerr_ErrorContext *gamepad_handle_added(void *appstate, SDL_Event *event);
akerr_ErrorContext *gamepad_handle_removed(void *appstate, SDL_Event *event);

/** @brief Keyboard id the tests bind their control maps to. */
#define TEST_KBID 11
/** @brief Gamepad id the tests bind their control maps to. */
#define TEST_JSID 22

/** @brief Stand-in for the application state pointer SDL hands to callbacks. */
static int appstate_placeholder = 0;

/** @brief The actor every control map in this file targets. */
static akgl_Actor *player = NULL;
/** @brief Base character supplying the player's acceleration constants. */
static akgl_Character *playerchar = NULL;

/** @brief Clear every control map so each test starts from an empty binding set. */
static void reset_control_maps(void)
{
    int i = 0;
    for ( i = 0; i < AKGL_MAX_CONTROL_MAPS; i++ ) {
	memset(&GAME_ControlMaps[i], 0x00, sizeof(akgl_ControlMap));
    }
}

/** @brief Register the "player" actor the gamepad handlers look up by name. */
static akerr_ErrorContext *make_player(void)
{
    PREPARE_ERROR(e);
    ATTEMPT {
	CATCH(e, akgl_registry_init_actor());
	CATCH(e, akgl_registry_init_character());
	CATCH(e, akgl_heap_init());

	CATCH(e, akgl_heap_next_character(&playerchar));
	CATCH(e, akgl_character_initialize(playerchar, "playerchar"));
	playerchar->ax = 6.0f;
	playerchar->ay = 8.0f;

	CATCH(e, akgl_heap_next_actor(&player));
	CATCH(e, akgl_actor_initialize(player, "player"));
	player->basechar = playerchar;
    } CLEANUP {
    } PROCESS(e) {
    } FINISH(e, true);
    SUCCEED_RETURN(e);
}

/** @brief Build a synthetic keyboard event. */
static void make_key_event(SDL_Event *event, uint32_t type, SDL_KeyboardID which, SDL_Keycode key)
{
    memset(event, 0x00, sizeof(SDL_Event));
    event->type = type;
    event->key.which = which;
    event->key.key = key;
}

/** @brief Build a synthetic gamepad button event. */
static void make_button_event(SDL_Event *event, uint32_t type, SDL_JoystickID which, uint8_t button)
{
    memset(event, 0x00, sizeof(SDL_Event));
    event->type = type;
    event->gbutton.which = which;
    event->gbutton.button = button;
}

akerr_ErrorContext *test_controller_pushmap(void)
{
    PREPARE_ERROR(e);
    akgl_Control control;
    int i = 0;

    ATTEMPT {
	reset_control_maps();
	memset(&control, 0x00, sizeof(akgl_Control));
	control.key = SDLK_SPACE;
	control.event_on = SDL_EVENT_KEY_DOWN;
	control.event_off = SDL_EVENT_KEY_UP;
	control.handler_on = &akgl_Actor_cmhf_left_on;
	control.handler_off = &akgl_Actor_cmhf_left_off;

	TEST_EXPECT_OK(e, akgl_controller_pushmap(0, &control), "pushing one control");
	TEST_ASSERT(e, GAME_ControlMaps[0].nextMap == 1,
		    "pushing one control left nextMap at %d, expected 1",
		    GAME_ControlMaps[0].nextMap);
	TEST_ASSERT(e, GAME_ControlMaps[0].controls[0].key == SDLK_SPACE,
		    "the pushed control did not land in slot 0");
	TEST_ASSERT(e, GAME_ControlMaps[0].controls[0].handler_on == &akgl_Actor_cmhf_left_on,
		    "the pushed control lost its press handler");

	// Pushes accumulate rather than overwrite.
	TEST_EXPECT_OK(e, akgl_controller_pushmap(0, &control), "pushing a second control");
	TEST_ASSERT(e, GAME_ControlMaps[0].nextMap == 2,
		    "pushing a second control left nextMap at %d, expected 2",
		    GAME_ControlMaps[0].nextMap);

	// Maps are independent of each other.
	TEST_EXPECT_OK(e, akgl_controller_pushmap(3, &control), "pushing into a different map");
	TEST_ASSERT(e, GAME_ControlMaps[3].nextMap == 1,
		    "map 3 nextMap is %d, expected 1", GAME_ControlMaps[3].nextMap);
	TEST_ASSERT(e, GAME_ControlMaps[0].nextMap == 2,
		    "pushing into map 3 disturbed map 0 (nextMap %d)", GAME_ControlMaps[0].nextMap);

	// Filling a map exactly to capacity still succeeds.
	reset_control_maps();
	for ( i = 0; i < AKGL_MAX_CONTROLS; i++ ) {
	    akerr_ErrorContext *pushresult = akgl_controller_pushmap(0, &control);
	    if ( pushresult != NULL ) {
		pushresult->handled = true;
		pushresult = akerr_release_error(pushresult);
		FAIL_BREAK(e, AKGL_ERR_BEHAVIOR, "pushing control %d of %d failed", i, AKGL_MAX_CONTROLS);
	    }
	}
	TEST_ASSERT(e, GAME_ControlMaps[0].nextMap == AKGL_MAX_CONTROLS,
		    "a full map reports nextMap %d, expected %d",
		    GAME_ControlMaps[0].nextMap, AKGL_MAX_CONTROLS);

	// One past capacity is refused.
	TEST_EXPECT_STATUS(e, AKERR_OUTOFBOUNDS, akgl_controller_pushmap(0, &control),
			   "pushing into a full control map");

	TEST_EXPECT_STATUS(e, AKERR_NULLPOINTER, akgl_controller_pushmap(0, NULL),
			   "pushing a NULL control");
	TEST_EXPECT_STATUS(e, AKERR_OUTOFBOUNDS,
			   akgl_controller_pushmap(AKGL_MAX_CONTROL_MAPS, &control),
			   "pushing into a control map id at the limit");
	TEST_EXPECT_STATUS(e, AKERR_OUTOFBOUNDS,
			   akgl_controller_pushmap(AKGL_MAX_CONTROL_MAPS + 5, &control),
			   "pushing into a control map id past the limit");
    } CLEANUP {
	reset_control_maps();
    } PROCESS(e) {
    } FINISH(e, true);
    SUCCEED_RETURN(e);
}

akerr_ErrorContext *test_controller_default_bindings(void)
{
    PREPARE_ERROR(e);

    ATTEMPT {
	reset_control_maps();
	CATCH(e, make_player());

	TEST_EXPECT_OK(e, akgl_controller_default(0, "player", TEST_KBID, TEST_JSID),
		       "installing the default control map");

	TEST_ASSERT(e, GAME_ControlMaps[0].target == player,
		    "the default map did not target the player actor");
	TEST_ASSERT(e, GAME_ControlMaps[0].kbid == TEST_KBID,
		    "the default map recorded keyboard %d, expected %d",
		    GAME_ControlMaps[0].kbid, TEST_KBID);
	TEST_ASSERT(e, GAME_ControlMaps[0].jsid == TEST_JSID,
		    "the default map recorded gamepad %d, expected %d",
		    GAME_ControlMaps[0].jsid, TEST_JSID);

	// Four keyboard bindings then four gamepad bindings.
	TEST_ASSERT(e, GAME_ControlMaps[0].nextMap == 8,
		    "the default map installed %d controls, expected 8",
		    GAME_ControlMaps[0].nextMap);

	TEST_ASSERT(e, GAME_ControlMaps[0].controls[0].key == SDLK_DOWN,
		    "the first default binding is not the down arrow");
	TEST_ASSERT(e, GAME_ControlMaps[0].controls[0].handler_on == &akgl_Actor_cmhf_down_on,
		    "the down arrow is not bound to the down handler");
	TEST_ASSERT(e, GAME_ControlMaps[0].controls[1].key == SDLK_UP,
		    "the second default binding is not the up arrow");
	TEST_ASSERT(e, GAME_ControlMaps[0].controls[2].key == SDLK_LEFT,
		    "the third default binding is not the left arrow");
	TEST_ASSERT(e, GAME_ControlMaps[0].controls[3].key == SDLK_RIGHT,
		    "the fourth default binding is not the right arrow");

	// The gamepad half binds buttons and leaves the keycode clear, so a
	// keyboard event cannot accidentally match a dpad binding.
	TEST_ASSERT(e, GAME_ControlMaps[0].controls[4].button == SDL_GAMEPAD_BUTTON_DPAD_DOWN,
		    "the fifth default binding is not the dpad down button");
	TEST_ASSERT(e, GAME_ControlMaps[0].controls[4].key == 0,
		    "a gamepad binding also carries a keycode");
	TEST_ASSERT(e, GAME_ControlMaps[0].controls[7].button == SDL_GAMEPAD_BUTTON_DPAD_RIGHT,
		    "the eighth default binding is not the dpad right button");

	// An unknown actor name is a registry error, not a crash.
	reset_control_maps();
	TEST_EXPECT_STATUS(e, AKGL_ERR_REGISTRY,
			   akgl_controller_default(1, "no_such_actor", TEST_KBID, TEST_JSID),
			   "installing a default map for an unregistered actor");

	TEST_EXPECT_STATUS(e, AKERR_OUTOFBOUNDS,
			   akgl_controller_default(AKGL_MAX_CONTROL_MAPS, "player", TEST_KBID, TEST_JSID),
			   "installing a default map at a control map id past the limit");
    } CLEANUP {
	reset_control_maps();
    } PROCESS(e) {
    } FINISH(e, true);
    SUCCEED_RETURN(e);
}

akerr_ErrorContext *test_controller_handle_keyboard_events(void)
{
    PREPARE_ERROR(e);
    SDL_Event event;

    ATTEMPT {
	reset_control_maps();
	CATCH(e, make_player());
	CATCH(e, akgl_controller_default(0, "player", TEST_KBID, TEST_JSID));

	// Pressing left routes to the left press handler.
	player->state = 0;
	make_key_event(&event, SDL_EVENT_KEY_DOWN, TEST_KBID, SDLK_LEFT);
	TEST_EXPECT_OK(e, akgl_controller_handle_event(&appstate_placeholder, &event),
		       "dispatching a left key press");
	TEST_ASSERT(e, AKGL_BITMASK_HAS(player->state, AKGL_ACTOR_STATE_MOVING_LEFT),
		    "a left key press did not start the actor moving left (state %d)", player->state);
	TEST_ASSERT_FEQ(e, player->ax, -6.0f,
			"a left key press set ax to %f, expected -6", player->ax);

	// Releasing it routes to the release handler.
	make_key_event(&event, SDL_EVENT_KEY_UP, TEST_KBID, SDLK_LEFT);
	TEST_EXPECT_OK(e, akgl_controller_handle_event(&appstate_placeholder, &event),
		       "dispatching a left key release");
	TEST_ASSERT(e, AKGL_BITMASK_HASNOT(player->state, AKGL_ACTOR_STATE_MOVING_LEFT),
		    "a left key release did not stop the actor (state %d)", player->state);

	// The other three directions route the same way.
	player->state = 0;
	make_key_event(&event, SDL_EVENT_KEY_DOWN, TEST_KBID, SDLK_RIGHT);
	TEST_EXPECT_OK(e, akgl_controller_handle_event(&appstate_placeholder, &event),
		       "dispatching a right key press");
	TEST_ASSERT(e, AKGL_BITMASK_HAS(player->state, AKGL_ACTOR_STATE_MOVING_RIGHT),
		    "a right key press did not start the actor moving right (state %d)", player->state);

	player->state = 0;
	make_key_event(&event, SDL_EVENT_KEY_DOWN, TEST_KBID, SDLK_UP);
	TEST_EXPECT_OK(e, akgl_controller_handle_event(&appstate_placeholder, &event),
		       "dispatching an up key press");
	TEST_ASSERT(e, AKGL_BITMASK_HAS(player->state, AKGL_ACTOR_STATE_MOVING_UP),
		    "an up key press did not start the actor moving up (state %d)", player->state);

	player->state = 0;
	make_key_event(&event, SDL_EVENT_KEY_DOWN, TEST_KBID, SDLK_DOWN);
	TEST_EXPECT_OK(e, akgl_controller_handle_event(&appstate_placeholder, &event),
		       "dispatching a down key press");
	TEST_ASSERT(e, AKGL_BITMASK_HAS(player->state, AKGL_ACTOR_STATE_MOVING_DOWN),
		    "a down key press did not start the actor moving down (state %d)", player->state);

	// An unbound key is ignored.
	player->state = 0;
	make_key_event(&event, SDL_EVENT_KEY_DOWN, TEST_KBID, SDLK_F12);
	TEST_EXPECT_OK(e, akgl_controller_handle_event(&appstate_placeholder, &event),
		       "dispatching an unbound key");
	TEST_ASSERT(e, player->state == 0,
		    "an unbound key changed the actor state to %d", player->state);

	// A bound key from a different keyboard is ignored, so split-keyboard
	// local multiplayer does not cross-talk.
	make_key_event(&event, SDL_EVENT_KEY_DOWN, TEST_KBID + 1, SDLK_LEFT);
	TEST_EXPECT_OK(e, akgl_controller_handle_event(&appstate_placeholder, &event),
		       "dispatching a bound key from an unbound keyboard");
	TEST_ASSERT(e, player->state == 0,
		    "a key from another keyboard changed the actor state to %d", player->state);
    } CLEANUP {
	reset_control_maps();
    } PROCESS(e) {
    } FINISH(e, true);
    SUCCEED_RETURN(e);
}

akerr_ErrorContext *test_controller_handle_gamepad_events(void)
{
    PREPARE_ERROR(e);
    SDL_Event event;

    ATTEMPT {
	reset_control_maps();
	CATCH(e, make_player());
	CATCH(e, akgl_controller_default(0, "player", TEST_KBID, TEST_JSID));

	player->state = 0;
	make_button_event(&event, SDL_EVENT_GAMEPAD_BUTTON_DOWN, TEST_JSID, SDL_GAMEPAD_BUTTON_DPAD_LEFT);
	TEST_EXPECT_OK(e, akgl_controller_handle_event(&appstate_placeholder, &event),
		       "dispatching a dpad left press");
	TEST_ASSERT(e, AKGL_BITMASK_HAS(player->state, AKGL_ACTOR_STATE_MOVING_LEFT),
		    "a dpad left press did not start the actor moving left (state %d)", player->state);

	make_button_event(&event, SDL_EVENT_GAMEPAD_BUTTON_UP, TEST_JSID, SDL_GAMEPAD_BUTTON_DPAD_LEFT);
	TEST_EXPECT_OK(e, akgl_controller_handle_event(&appstate_placeholder, &event),
		       "dispatching a dpad left release");
	TEST_ASSERT(e, AKGL_BITMASK_HASNOT(player->state, AKGL_ACTOR_STATE_MOVING_LEFT),
		    "a dpad left release did not stop the actor (state %d)", player->state);

	player->state = 0;
	make_button_event(&event, SDL_EVENT_GAMEPAD_BUTTON_DOWN, TEST_JSID, SDL_GAMEPAD_BUTTON_DPAD_UP);
	TEST_EXPECT_OK(e, akgl_controller_handle_event(&appstate_placeholder, &event),
		       "dispatching a dpad up press");
	TEST_ASSERT(e, AKGL_BITMASK_HAS(player->state, AKGL_ACTOR_STATE_MOVING_UP),
		    "a dpad up press did not start the actor moving up (state %d)", player->state);

	// A press from an unbound gamepad is ignored.
	player->state = 0;
	make_button_event(&event, SDL_EVENT_GAMEPAD_BUTTON_DOWN, TEST_JSID + 1, SDL_GAMEPAD_BUTTON_DPAD_LEFT);
	TEST_EXPECT_OK(e, akgl_controller_handle_event(&appstate_placeholder, &event),
		       "dispatching a dpad press from an unbound gamepad");
	TEST_ASSERT(e, player->state == 0,
		    "a press from another gamepad changed the actor state to %d", player->state);

	// An unbound button on the bound gamepad is ignored.
	make_button_event(&event, SDL_EVENT_GAMEPAD_BUTTON_DOWN, TEST_JSID, SDL_GAMEPAD_BUTTON_START);
	TEST_EXPECT_OK(e, akgl_controller_handle_event(&appstate_placeholder, &event),
		       "dispatching an unbound gamepad button");
	TEST_ASSERT(e, player->state == 0,
		    "an unbound gamepad button changed the actor state to %d", player->state);
    } CLEANUP {
	reset_control_maps();
    } PROCESS(e) {
    } FINISH(e, true);
    SUCCEED_RETURN(e);
}

akerr_ErrorContext *test_controller_handle_event_edge_cases(void)
{
    PREPARE_ERROR(e);
    SDL_Event event;

    ATTEMPT {
	reset_control_maps();
	CATCH(e, make_player());

	// With no control maps installed at all, every event is a no-op.
	make_key_event(&event, SDL_EVENT_KEY_DOWN, TEST_KBID, SDLK_LEFT);
	TEST_EXPECT_OK(e, akgl_controller_handle_event(&appstate_placeholder, &event),
		       "dispatching into an empty control map table");

	// A map in a later slot is still reached, so the scan does not stop at
	// the first unpopulated entry.
	CATCH(e, akgl_controller_default(5, "player", TEST_KBID, TEST_JSID));
	player->state = 0;
	TEST_EXPECT_OK(e, akgl_controller_handle_event(&appstate_placeholder, &event),
		       "dispatching to a control map in a later slot");
	TEST_ASSERT(e, AKGL_BITMASK_HAS(player->state, AKGL_ACTOR_STATE_MOVING_LEFT),
		    "a control map in slot 5 was not consulted (state %d)", player->state);

	// An event type that no binding uses falls through harmlessly.
	memset(&event, 0x00, sizeof(SDL_Event));
	event.type = SDL_EVENT_MOUSE_MOTION;
	TEST_EXPECT_OK(e, akgl_controller_handle_event(&appstate_placeholder, &event),
		       "dispatching an event type with no bindings");

	TEST_EXPECT_STATUS(e, AKERR_NULLPOINTER, akgl_controller_handle_event(NULL, &event),
			   "dispatching with a NULL appstate");
	TEST_EXPECT_STATUS(e, AKERR_NULLPOINTER,
			   akgl_controller_handle_event(&appstate_placeholder, NULL),
			   "dispatching a NULL event");
    } CLEANUP {
	reset_control_maps();
    } PROCESS(e) {
    } FINISH(e, true);
    SUCCEED_RETURN(e);
}

akerr_ErrorContext *test_controller_gamepad_button_handlers(void)
{
    PREPARE_ERROR(e);
    SDL_Event event;

    ATTEMPT {
	CATCH(e, make_player());

	// These handlers find their actor by looking up "player" in the registry
	// rather than taking it as an argument.
	player->state = 0;
	player->movement_controls_face = false;
	make_button_event(&event, SDL_EVENT_GAMEPAD_BUTTON_DOWN, TEST_JSID, SDL_GAMEPAD_BUTTON_DPAD_DOWN);
	TEST_EXPECT_OK(e, gamepad_handle_button_down(&appstate_placeholder, &event),
		       "dpad down press handler");
	TEST_ASSERT(e, AKGL_BITMASK_HAS(player->state, AKGL_ACTOR_STATE_MOVING_DOWN),
		    "the dpad down handler did not set MOVING_DOWN (state %d)", player->state);
	// With automatic facing off, the handler sets the facing itself.
	TEST_ASSERT(e, AKGL_BITMASK_HAS(player->state, AKGL_ACTOR_STATE_FACE_DOWN),
		    "the dpad down handler did not set FACE_DOWN (state %d)", player->state);

	TEST_EXPECT_OK(e, gamepad_handle_button_up(&appstate_placeholder, &event),
		       "dpad down release handler");
	TEST_ASSERT(e, AKGL_BITMASK_HASNOT(player->state, AKGL_ACTOR_STATE_MOVING_DOWN),
		    "the dpad down release handler did not clear MOVING_DOWN (state %d)", player->state);
	TEST_ASSERT(e, player->curSpriteFrameId == 0,
		    "the release handler did not reset the animation frame");

	player->state = 0;
	make_button_event(&event, SDL_EVENT_GAMEPAD_BUTTON_DOWN, TEST_JSID, SDL_GAMEPAD_BUTTON_DPAD_UP);
	TEST_EXPECT_OK(e, gamepad_handle_button_down(&appstate_placeholder, &event), "dpad up press handler");
	TEST_ASSERT(e, AKGL_BITMASK_HAS(player->state, AKGL_ACTOR_STATE_MOVING_UP),
		    "the dpad up handler did not set MOVING_UP (state %d)", player->state);
	TEST_EXPECT_OK(e, gamepad_handle_button_up(&appstate_placeholder, &event), "dpad up release handler");

	player->state = 0;
	make_button_event(&event, SDL_EVENT_GAMEPAD_BUTTON_DOWN, TEST_JSID, SDL_GAMEPAD_BUTTON_DPAD_LEFT);
	TEST_EXPECT_OK(e, gamepad_handle_button_down(&appstate_placeholder, &event), "dpad left press handler");
	TEST_ASSERT(e, AKGL_BITMASK_HAS(player->state, AKGL_ACTOR_STATE_MOVING_LEFT),
		    "the dpad left handler did not set MOVING_LEFT (state %d)", player->state);
	TEST_EXPECT_OK(e, gamepad_handle_button_up(&appstate_placeholder, &event), "dpad left release handler");

	player->state = 0;
	make_button_event(&event, SDL_EVENT_GAMEPAD_BUTTON_DOWN, TEST_JSID, SDL_GAMEPAD_BUTTON_DPAD_RIGHT);
	TEST_EXPECT_OK(e, gamepad_handle_button_down(&appstate_placeholder, &event), "dpad right press handler");
	TEST_ASSERT(e, AKGL_BITMASK_HAS(player->state, AKGL_ACTOR_STATE_MOVING_RIGHT),
		    "the dpad right handler did not set MOVING_RIGHT (state %d)", player->state);
	TEST_EXPECT_OK(e, gamepad_handle_button_up(&appstate_placeholder, &event), "dpad right release handler");

	// With automatic facing on, the handler leaves facing to the actor's own
	// face function.
	player->state = 0;
	player->movement_controls_face = true;
	make_button_event(&event, SDL_EVENT_GAMEPAD_BUTTON_DOWN, TEST_JSID, SDL_GAMEPAD_BUTTON_DPAD_DOWN);
	TEST_EXPECT_OK(e, gamepad_handle_button_down(&appstate_placeholder, &event),
		       "dpad down press with automatic facing on");
	TEST_ASSERT(e, AKGL_BITMASK_HASNOT(player->state, AKGL_ACTOR_STATE_FACE_DOWN),
		    "the handler set facing even though the actor faces automatically (state %d)",
		    player->state);

	TEST_EXPECT_STATUS(e, AKERR_NULLPOINTER, gamepad_handle_button_down(NULL, &event),
			   "dpad press handler with a NULL appstate");
	TEST_EXPECT_STATUS(e, AKERR_NULLPOINTER,
			   gamepad_handle_button_down(&appstate_placeholder, NULL),
			   "dpad press handler with a NULL event");
	TEST_EXPECT_STATUS(e, AKERR_NULLPOINTER, gamepad_handle_button_up(NULL, &event),
			   "dpad release handler with a NULL appstate");
	TEST_EXPECT_STATUS(e, AKERR_NULLPOINTER,
			   gamepad_handle_button_up(&appstate_placeholder, NULL),
			   "dpad release handler with a NULL event");

	// With no actor named "player" registered there is nothing to drive.
	CATCH(e, akgl_registry_init_actor());
	make_button_event(&event, SDL_EVENT_GAMEPAD_BUTTON_DOWN, TEST_JSID, SDL_GAMEPAD_BUTTON_DPAD_DOWN);
	TEST_EXPECT_STATUS(e, AKERR_NULLPOINTER,
			   gamepad_handle_button_down(&appstate_placeholder, &event),
			   "dpad press handler with no player actor registered");
	TEST_EXPECT_STATUS(e, AKERR_NULLPOINTER,
			   gamepad_handle_button_up(&appstate_placeholder, &event),
			   "dpad release handler with no player actor registered");
    } CLEANUP {
    } PROCESS(e) {
    } FINISH(e, true);
    SUCCEED_RETURN(e);
}

akerr_ErrorContext *test_controller_device_events(void)
{
    PREPARE_ERROR(e);
    SDL_Event event;

    ATTEMPT {
	// The dummy drivers present no gamepads, so the add and remove handlers
	// take their "unknown device" paths. Neither may crash.
	make_button_event(&event, SDL_EVENT_GAMEPAD_ADDED, 999, 0);
	TEST_EXPECT_OK(e, gamepad_handle_added(&appstate_placeholder, &event),
		       "handling an add for a device that cannot be opened");

	make_button_event(&event, SDL_EVENT_GAMEPAD_REMOVED, 999, 0);
	TEST_EXPECT_OK(e, gamepad_handle_removed(&appstate_placeholder, &event),
		       "handling a remove for a device that was never open");

	TEST_EXPECT_STATUS(e, AKERR_NULLPOINTER, gamepad_handle_added(NULL, &event),
			   "add handler with a NULL appstate");
	TEST_EXPECT_STATUS(e, AKERR_NULLPOINTER,
			   gamepad_handle_added(&appstate_placeholder, NULL),
			   "add handler with a NULL event");
	TEST_EXPECT_STATUS(e, AKERR_NULLPOINTER, gamepad_handle_removed(NULL, &event),
			   "remove handler with a NULL appstate");
	TEST_EXPECT_STATUS(e, AKERR_NULLPOINTER,
			   gamepad_handle_removed(&appstate_placeholder, NULL),
			   "remove handler with a NULL event");
    } CLEANUP {
    } PROCESS(e) {
    } FINISH(e, true);
    SUCCEED_RETURN(e);
}

akerr_ErrorContext *test_controller_device_enumeration(void)
{
    PREPARE_ERROR(e);

    ATTEMPT {
	// Enumeration has to succeed on a machine with no input devices, which
	// is the normal state under the dummy drivers and in CI.
	TEST_EXPECT_OK(e, akgl_controller_list_keyboards(), "listing keyboards");
	TEST_EXPECT_OK(e, akgl_controller_open_gamepads(), "opening gamepads");
    } CLEANUP {
    } PROCESS(e) {
    } FINISH(e, true);
    SUCCEED_RETURN(e);
}

int main(void)
{
    PREPARE_ERROR(errctx);

    SDL_SetHint(SDL_HINT_VIDEO_DRIVER, "dummy");
    SDL_SetHint(SDL_HINT_AUDIO_DRIVER, "dummy");

    ATTEMPT {
	FAIL_ZERO_BREAK(
	    errctx,
	    SDL_Init(SDL_INIT_VIDEO | SDL_INIT_GAMEPAD),
	    AKGL_ERR_SDL,
	    "Couldn't initialize SDL: %s",
	    SDL_GetError());

	CATCH(errctx, akgl_heap_init());
	CATCH(errctx, akgl_registry_init());

	CATCH(errctx, test_controller_pushmap());
	CATCH(errctx, test_controller_default_bindings());
	CATCH(errctx, test_controller_handle_keyboard_events());
	CATCH(errctx, test_controller_handle_gamepad_events());
	CATCH(errctx, test_controller_handle_event_edge_cases());
	CATCH(errctx, test_controller_gamepad_button_handlers());
	CATCH(errctx, test_controller_device_events());
	CATCH(errctx, test_controller_device_enumeration());
    } CLEANUP {
	SDL_Quit();
    } PROCESS(errctx) {
    } FINISH_NORETURN(errctx);
}