#include <addons.h>

static
void Iter(ecs_iter_t *it) {
    Position *p = ecs_field(it, Position, 1);
    Velocity *v = NULL;
    Mass *m = NULL;

    if (it->field_count >= 2) {
        if (ecs_field_size(it, 2) == sizeof(Velocity)) {
            v = ecs_field(it, Velocity, 2);
        }
    }

    if (it->field_count >= 3) {
        if (ecs_field_size(it, 3) == sizeof(Mass)) {
            m = ecs_field(it, Mass, 3);
        }
    }

    probe_iter(it);

    int i;
    for (i = 0; i < it->count; i ++) {
        if (p) {
            p[i].x = 10;
            p[i].y = 20;
        }

        if (v) {
            v[i].x = 30;
            v[i].y = 40;
        }

        if (m) {
            m[i] = 50;
        }
    }
}

void SystemPeriodic_1_type_1_component(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);

    ECS_ENTITY(world, e1, Position);
    ECS_ENTITY(world, e2, Position);
    ECS_ENTITY(world, e3, Position);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 3);
    test_int(ctx.invoked, 1);
    test_int(ctx.system, Iter);
    test_int(ctx.term_count, 1);
    test_null(ctx.param);

    test_int(ctx.e[0], e1);
    test_int(ctx.e[1], e2);
    test_int(ctx.e[2], e3);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);

    const Position *p = ecs_get(world, e1, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e2, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e3, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    ecs_fini(world);
}

void SystemPeriodic_1_type_3_component(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);
    ECS_COMPONENT(world, Mass);

    ECS_ENTITY(world, e1, Position, Velocity, Mass);
    ECS_ENTITY(world, e2, Position, Velocity, Mass);
    ECS_ENTITY(world, e3, Position, Velocity, Mass);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, Velocity, Mass);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 3);
    test_int(ctx.invoked, 1);
    test_int(ctx.system, Iter);
    test_int(ctx.term_count, 3);
    test_null(ctx.param);

    test_int(ctx.e[0], e1);
    test_int(ctx.e[1], e2);
    test_int(ctx.e[2], e3);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);
    test_int(ctx.c[0][2], ecs_id(Mass));
    test_int(ctx.s[0][2], 0);

    const Position *p = ecs_get(world, e1, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e2, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e3, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    
    const Velocity *v = ecs_get(world, e1, Velocity);
    test_assert(v != NULL);
    test_int(v->x, 30);
    test_int(v->y, 40);

    v = ecs_get(world, e2, Velocity);
    test_assert(v != NULL);
    test_int(v->x, 30);
    test_int(v->y, 40);

    v = ecs_get(world, e3, Velocity);
    test_assert(v != NULL);
    test_int(v->x, 30);
    test_int(v->y, 40);


    const Mass *m = ecs_get(world, e1, Mass);
    test_assert(m != NULL);
    test_int(*m, 50);

    m = ecs_get(world, e2, Mass);
    test_assert(m != NULL);
    test_int(*m, 50);

    m = ecs_get(world, e3, Mass);
    test_assert(m != NULL);
    test_int(*m, 50);

    ecs_fini(world);
}

void SystemPeriodic_3_type_1_component(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);
    ECS_COMPONENT(world, Mass);

    ECS_ENTITY(world, e1, Position);
    ECS_ENTITY(world, e2, Position, Velocity);
    ECS_ENTITY(world, e3, Position, Mass);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 3);
    test_int(ctx.invoked, 3);
    test_int(ctx.system, Iter);
    test_int(ctx.term_count, 1);
    test_null(ctx.param);

    test_int(ctx.e[0], e1);
    test_int(ctx.e[1], e2);
    test_int(ctx.e[2], e3);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[1][0], ecs_id(Position));
    test_int(ctx.s[1][0], 0);
    test_int(ctx.c[2][0], ecs_id(Position));
    test_int(ctx.s[2][0], 0);

    const Position *p = ecs_get(world, e1, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e2, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e3, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    ecs_fini(world);
}

void SystemPeriodic_2_type_3_component(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);
    ECS_COMPONENT(world, Mass);
    ECS_COMPONENT(world, Rotation);

    ECS_ENTITY(world, e1, Position, Velocity, Mass);
    ECS_ENTITY(world, e2, Position, Velocity, Mass);
    ECS_ENTITY(world, e3, Position, Velocity, Mass, Rotation);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, Velocity, Mass);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 3);
    test_int(ctx.invoked, 2);
    test_int(ctx.system, Iter);
    test_int(ctx.term_count, 3);
    test_null(ctx.param);

    test_int(ctx.e[0], e1);
    test_int(ctx.e[1], e2);
    test_int(ctx.e[2], e3);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);
    test_int(ctx.c[0][2], ecs_id(Mass));
    test_int(ctx.s[0][2], 0);
    test_int(ctx.c[1][0], ecs_id(Position));
    test_int(ctx.s[1][0], 0);
    test_int(ctx.c[1][1], ecs_id(Velocity));
    test_int(ctx.s[1][1], 0);
    test_int(ctx.c[1][2], ecs_id(Mass));
    test_int(ctx.s[1][2], 0);

    const Position *p = ecs_get(world, e1, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e2, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e3, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    
    const Velocity *v = ecs_get(world, e1, Velocity);
    test_assert(v != NULL);
    test_int(v->x, 30);
    test_int(v->y, 40);

    v = ecs_get(world, e2, Velocity);
    test_assert(v != NULL);
    test_int(v->x, 30);
    test_int(v->y, 40);

    v = ecs_get(world, e3, Velocity);
    test_assert(v != NULL);
    test_int(v->x, 30);
    test_int(v->y, 40);


    const Mass *m = ecs_get(world, e1, Mass);
    test_assert(m != NULL);
    test_int(*m, 50);

    m = ecs_get(world, e2, Mass);
    test_assert(m != NULL);
    test_int(*m, 50);

    m = ecs_get(world, e3, Mass);
    test_assert(m != NULL);
    test_int(*m, 50);

    ecs_fini(world);
}

void SystemPeriodic_1_type_1_component_1_tag(void) {
    ecs_world_t *world = ecs_init();

    ECS_ENTITY(world, Tag, 0);
    ECS_COMPONENT(world, Position);

    ECS_ENTITY(world, e1, Position, Tag);
    ECS_ENTITY(world, e2, Position, Tag);
    ECS_ENTITY(world, e3, Position, Tag);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, Tag);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 3);
    test_int(ctx.invoked, 1);
    test_int(ctx.system, Iter);
    test_int(ctx.term_count, 2);
    test_null(ctx.param);

    test_int(ctx.e[0], e1);
    test_int(ctx.e[1], e2);
    test_int(ctx.e[2], e3);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], Tag);
    test_int(ctx.s[0][1], 0);

    const Position *p = ecs_get(world, e1, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e2, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e3, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    ecs_fini(world);
}

void SystemPeriodic_2_type_1_component_1_tag(void) {
    ecs_world_t *world = ecs_init();

    ECS_ENTITY(world, Tag, 0);
    ECS_COMPONENT(world, Position);

    ECS_ENTITY(world, e1, Position, Tag);
    ECS_ENTITY(world, e2, Position, Tag);
    ECS_ENTITY(world, e3, Position);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, Tag);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 2);
    test_int(ctx.invoked, 1);
    test_int(ctx.system, Iter);
    test_int(ctx.term_count, 2);
    test_null(ctx.param);

    test_int(ctx.e[0], e1);
    test_int(ctx.e[1], e2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], Tag);
    test_int(ctx.s[0][1], 0);

    const Position *p = ecs_get(world, e1, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e2, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    ecs_fini(world);
}


void SystemPeriodic_2_type_1_and_1_not(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);

    ECS_ENTITY(world, e1, Position);
    ECS_ENTITY(world, e2, Position);
    ECS_ENTITY(world, e3, Position, Velocity);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, !Velocity);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 2);
    test_int(ctx.invoked, 1);
    test_int(ctx.system, Iter);
    test_int(ctx.term_count, 2);
    test_null(ctx.param);

    test_int(ctx.e[0], e1);
    test_int(ctx.e[1], e2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);

    const Position *p = ecs_get(world, e1, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e2, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    ecs_fini(world);
}

void SystemPeriodic_2_type_2_and_1_not(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);
    ECS_COMPONENT(world, Mass);

    ECS_ENTITY(world, e1, Position, Velocity);
    ECS_ENTITY(world, e2, Position, Velocity);
    ECS_ENTITY(world, e3, Position, Velocity, Mass);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, Velocity, !Mass);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 2);
    test_int(ctx.invoked, 1);
    test_int(ctx.system, Iter);
    test_int(ctx.term_count, 3);
    test_null(ctx.param);

    test_int(ctx.e[0], e1);
    test_int(ctx.e[1], e2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);
    test_int(ctx.c[0][2], ecs_id(Mass));
    test_int(ctx.s[0][2], 0);
    
    const Position *p = ecs_get(world, e1, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e2, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    const Velocity *v = ecs_get(world, e1, Velocity);
    test_assert(v != NULL);
    test_int(v->x, 30);
    test_int(v->y, 40);

    v = ecs_get(world, e2, Velocity);
    test_assert(v != NULL);
    test_int(v->x, 30);
    test_int(v->y, 40);

    ecs_fini(world);
}

void SystemPeriodic_2_type_2_and_2_not(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);
    ECS_COMPONENT(world, Mass);
    ECS_COMPONENT(world, Rotation);

    ECS_ENTITY(world, e1, Position, Velocity);
    ECS_ENTITY(world, e2, Position, Velocity, Rotation);
    ECS_ENTITY(world, e3, Position, Velocity, Mass);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, Velocity, !Mass, !Rotation);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 1);
    test_int(ctx.invoked, 1);
    test_int(ctx.system, Iter);
    test_int(ctx.term_count, 4);
    test_null(ctx.param);

    test_int(ctx.e[0], e1);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);
    test_int(ctx.c[0][2], ecs_id(Mass));
    test_int(ctx.s[0][2], 0);
    test_int(ctx.c[0][3], ecs_id(Rotation));
    test_int(ctx.s[0][3], 0);

    const Position *p = ecs_get(world, e1, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    const Velocity *v = ecs_get(world, e1, Velocity);
    test_assert(v != NULL);
    test_int(v->x, 30);
    test_int(v->y, 40);

    ecs_fini(world);
}

typedef Position Position_1;
typedef Position Position_2;

void SystemPeriodic_4_type_1_and_1_or(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Position_1);
    ECS_COMPONENT(world, Velocity);

    ECS_ENTITY(world, e1, Position, Velocity);
    ECS_ENTITY(world, e2, Position_1, Velocity);
    ECS_ENTITY(world, e3, Position, Position_1, Velocity);
    ECS_ENTITY(world, e4, Velocity);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position || Position_1, Velocity);

    ecs_set(world, e3, Position_1, {0, 0});
    ecs_set(world, e4, Velocity, {0, 0});

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 3);
    test_int(ctx.invoked, 3);
    test_int(ctx.system, Iter);
    test_int(ctx.term_count, 2);
    test_null(ctx.param);

    test_int(ctx.e[0], e1);
    test_int(ctx.e[1], e2);
    test_int(ctx.e[2], e3);

    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);
    test_int(ctx.c[1][0], ecs_id(Position_1));
    test_int(ctx.s[1][0], 0);
    test_int(ctx.c[1][1], ecs_id(Velocity));
    test_int(ctx.s[1][1], 0);
    test_int(ctx.c[2][0], ecs_id(Position));
    test_int(ctx.s[2][0], 0);
    test_int(ctx.c[2][1], ecs_id(Velocity));
    test_int(ctx.s[2][1], 0);

    ecs_fini(world);
}

void SystemPeriodic_4_type_1_and_1_or_of_3(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Position_1);
    ECS_COMPONENT(world, Position_2);
    ECS_COMPONENT(world, Velocity);

    ECS_ENTITY(world, e1, Position, Velocity);
    ECS_ENTITY(world, e2, Position_2, Velocity);
    ECS_ENTITY(world, e3, Position_1, Position_2, Velocity);
    ECS_ENTITY(world, e4, Velocity);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position || Position_1 || Position_2, Velocity);

    ecs_set(world, e3, Position_2, {0, 0});
    ecs_set(world, e4, Velocity, {0, 0});

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 3);
    test_int(ctx.invoked, 3);
    test_int(ctx.system, Iter);
    test_int(ctx.term_count, 2);
    test_null(ctx.param);

    test_int(ctx.e[0], e1);
    test_int(ctx.e[1], e2);
    test_int(ctx.e[2], e3);

    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);
    test_int(ctx.c[1][0], ecs_id(Position_2));
    test_int(ctx.s[1][0], 0);
    test_int(ctx.c[1][1], ecs_id(Velocity));
    test_int(ctx.s[1][1], 0);
    test_int(ctx.c[2][0], ecs_id(Position_1));
    test_int(ctx.s[2][0], 0);
    test_int(ctx.c[2][1], ecs_id(Velocity));
    test_int(ctx.s[2][1], 0);

    ecs_fini(world);
}

void SystemPeriodic_1_type_1_and_1_or(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Position_1);
    ECS_COMPONENT(world, Velocity);

    ECS_ENTITY(world, e1, Position, Velocity);
    ECS_ENTITY(world, e2, Position, Velocity);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position || Position_1, Velocity);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 2);
    test_int(ctx.invoked, 1);
    test_int(ctx.system, Iter);
    test_int(ctx.term_count, 2);
    test_null(ctx.param);

    test_int(ctx.e[0], e1);
    test_int(ctx.e[1], e2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);

    /* Now repeat test, with entities that have Position_1 */
    ecs_os_zeromem(&ctx);

    ecs_delete(world, e1);
    ecs_delete(world, e2);

    ECS_ENTITY(world, e3, Position_1, Velocity);
    ECS_ENTITY(world, e4, Position_1, Velocity);
    
    ecs_progress(world, 1);

    test_int(ctx.count, 2);
    test_int(ctx.invoked, 1);
    test_int(ctx.system, Iter);
    test_int(ctx.term_count, 2);
    test_null(ctx.param);

    test_int(ctx.e[0], e3);
    test_int(ctx.e[1], e4);
    test_int(ctx.c[0][0], ecs_id(Position_1));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);

    ecs_fini(world);
}

void SystemPeriodic_2_type_1_and_1_optional(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);

    ECS_ENTITY(world, e1, Position, Velocity);
    ECS_ENTITY(world, e2, Position, Velocity);
    ECS_ENTITY(world, e3, Position);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, ?Velocity);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 3);
    test_int(ctx.invoked, 2);
    test_int(ctx.system, Iter);
    test_int(ctx.term_count, 2);
    test_null(ctx.param);

    test_int(ctx.e[0], e1);
    test_int(ctx.e[1], e2);
    test_int(ctx.e[2], e3);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);
    test_int(ctx.c[1][0], ecs_id(Position));
    test_int(ctx.s[1][0], 0);
    test_int(ctx.c[1][1], ecs_id(Velocity));
    test_int(ctx.s[1][1], 0);

    const Position *p = ecs_get(world, e1, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e2, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e3, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    const Velocity *v = ecs_get(world, e1, Velocity);
    test_assert(v != NULL);
    test_int(v->x, 30);
    test_int(v->y, 40);

    v = ecs_get(world, e2, Velocity);
    test_assert(v != NULL);
    test_int(v->x, 30);
    test_int(v->y, 40);

    ecs_fini(world);
}

void SystemPeriodic_2_type_2_and_1_optional(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);
    ECS_COMPONENT(world, Mass);

    ECS_ENTITY(world, e1, Position, Velocity, Mass);
    ECS_ENTITY(world, e2, Position, Velocity, Mass);
    ECS_ENTITY(world, e3, Position, Velocity);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, Velocity, ?Mass);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 3);
    test_int(ctx.invoked, 2);
    test_int(ctx.system, Iter);
    test_int(ctx.term_count, 3);
    test_null(ctx.param);

    probe_has_entity(&ctx, e1);
    probe_has_entity(&ctx, e2);
    probe_has_entity(&ctx, e3);

    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);
    test_int(ctx.c[0][2], ecs_id(Mass));
    test_int(ctx.s[0][2], 0);
    test_int(ctx.c[1][0], ecs_id(Position));
    test_int(ctx.s[1][0], 0);
    test_int(ctx.c[1][1], ecs_id(Velocity));
    test_int(ctx.s[1][1], 0);
    test_int(ctx.c[1][2], ecs_id(Mass));
    test_int(ctx.s[1][2], 0);

    const Position *p = ecs_get(world, e1, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e2, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e3, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    const Velocity *v = ecs_get(world, e1, Velocity);
    test_assert(v != NULL);
    test_int(v->x, 30);
    test_int(v->y, 40);

    v = ecs_get(world, e2, Velocity);
    test_assert(v != NULL);
    test_int(v->x, 30);
    test_int(v->y, 40);

    v = ecs_get(world, e3, Velocity);
    test_assert(v != NULL);
    test_int(v->x, 30);
    test_int(v->y, 40);

    const Mass *m = ecs_get(world, e1, Mass);
    test_assert(m != NULL);
    test_int(*m, 50);

    ecs_fini(world);
}

void SystemPeriodic_6_type_1_and_2_optional(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);
    ECS_COMPONENT(world, Mass);

    ECS_ENTITY(world, e1, Position, Velocity);
    ECS_ENTITY(world, e2, Position, Velocity, Mass);
    ECS_ENTITY(world, e3, Position, Mass);
    ECS_ENTITY(world, e4, Position);
    ECS_ENTITY(world, e5, Velocity);
    ECS_ENTITY(world, e6, Mass);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, ?Velocity, ?Mass);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 4);
    test_int(ctx.invoked, 4);
    test_int(ctx.system, Iter);
    test_int(ctx.term_count, 3);
    test_null(ctx.param);

    probe_has_entity(&ctx, e1);
    probe_has_entity(&ctx, e2);
    probe_has_entity(&ctx, e3);
    probe_has_entity(&ctx, e4);

    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);
    test_int(ctx.c[0][2], ecs_id(Mass));
    test_int(ctx.s[0][2], 0);
    test_int(ctx.c[1][0], ecs_id(Position));
    test_int(ctx.s[1][0], 0);
    test_int(ctx.c[1][1], ecs_id(Velocity));
    test_int(ctx.s[1][1], 0);
    test_int(ctx.c[1][2], ecs_id(Mass));
    test_int(ctx.s[1][2], 0);    
    test_int(ctx.c[2][0], ecs_id(Position));
    test_int(ctx.s[2][0], 0);
    test_int(ctx.c[2][1], ecs_id(Velocity));
    test_int(ctx.s[2][1], 0);
    test_int(ctx.c[2][2], ecs_id(Mass));
    test_int(ctx.s[2][2], 0);   
    test_int(ctx.c[3][0], ecs_id(Position));
    test_int(ctx.s[3][0], 0);
    test_int(ctx.c[3][1], ecs_id(Velocity));
    test_int(ctx.s[3][1], 0);
    test_int(ctx.c[3][2], ecs_id(Mass));
    test_int(ctx.s[3][2], 0);   

    const Position *p = ecs_get(world, e1, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e2, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e3, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    p = ecs_get(world, e4, Position);
    test_assert(p != NULL);
    test_int(p->x, 10);
    test_int(p->y, 20);

    const Velocity *v = ecs_get(world, e1, Velocity);
    test_assert(v != NULL);
    test_int(v->x, 30);
    test_int(v->y, 40);

    v = ecs_get(world, e2, Velocity);
    test_assert(v != NULL);
    test_int(v->x, 30);
    test_int(v->y, 40);

    const Mass *m = ecs_get(world, e2, Mass);
    test_assert(m != NULL);
    test_int(*m, 50);

    m = ecs_get(world, e3, Mass);
    test_assert(m != NULL);
    test_int(*m, 50);

    ecs_fini(world);
}

static void Dummy_1(ecs_iter_t *it) { probe_iter(it); }
static void Dummy_2(ecs_iter_t *it) { probe_iter(it); }

void SystemPeriodic_match_2_systems_w_populated_table(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);

    ECS_ENTITY(world, e, Position);

    ECS_SYSTEM(world, Dummy_1, EcsOnUpdate, Position);
    ECS_SYSTEM(world, Dummy_2, EcsOnUpdate, Position);
    
    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 2);
    test_int(ctx.invoked, 2);
    test_int(ctx.term_count, 1);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);

    test_int(ctx.e[0], e);
    test_int(ctx.e[1], e);

    ecs_fini(world);
}

void TestOptional_w_column(ecs_iter_t *it) {
    Position *p = ecs_field(it, Position, 1);
    Velocity *v = ecs_field(it, Velocity, 2);

    test_assert(p != NULL);
    test_assert(v == NULL);

    probe_iter(it);
}

void TestOptional_w_shared(ecs_iter_t *it) {
    Position *p = ecs_field(it, Position, 1);
    Velocity *v = ecs_field(it, Velocity, 2);

    test_assert(p != NULL);
    test_assert(v == NULL);

    probe_iter(it);
}

void SystemPeriodic_ensure_optional_is_unset_column(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);

    ECS_ENTITY(world, e, Position);

    ECS_SYSTEM(world, TestOptional_w_column, EcsOnUpdate, Position, ?Velocity);
    
    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 1);
    test_int(ctx.invoked, 1);
    test_int(ctx.term_count, 2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);

    test_int(ctx.e[0], e);

    ecs_fini(world);
}

void SystemPeriodic_ensure_optional_is_null_shared(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);

    ECS_ENTITY(world, e, Position);

    ECS_SYSTEM(world, TestOptional_w_shared, EcsOnUpdate, Position, ?Velocity(parent));
    
    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 1);
    test_int(ctx.invoked, 1);
    test_int(ctx.term_count, 2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);

    test_int(ctx.e[0], e);

    ecs_fini(world);
}

static int on_period_count;
static int normal_count;
static int normal_count_2;
static int normal_count_3;

static
void OnPeriodSystem(ecs_iter_t *it) {
    on_period_count ++;
}

static
void NormalSystem(ecs_iter_t *it) {
    normal_count ++;
}

static
void NormalSystem2(ecs_iter_t *it) {
    normal_count_2 ++;
}

static
void NormalSystem3(ecs_iter_t *it) {
    normal_count_3 ++;
}

void SystemPeriodic_on_period(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_ENTITY(world, e, Position);

    ECS_SYSTEM(world, OnPeriodSystem, EcsOnUpdate, Position);
    ECS_SYSTEM(world, NormalSystem, EcsOnUpdate, Position);

    ecs_set_interval(world, OnPeriodSystem, 0.5);

    ecs_set_target_fps(world, 60);

    const ecs_world_info_t *stats = ecs_get_world_info(world);

    double start, now = 0;

    /* Run for one second */
    int count = 0;
    do {    
        ecs_progress(world, 0);
        if (!count) {
            start = stats->delta_time;
        }

        now += stats->delta_time;
        count ++;
    } while ((now - start) < 1.0);

    test_int(count, normal_count);
    test_int(on_period_count, 2);

    ecs_fini(world);
}

void SystemPeriodic_on_period_long_delta(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);

    ECS_ENTITY(world, e, Position);

    ECS_SYSTEM(world, OnPeriodSystem, EcsOnUpdate, Position);
    ECS_SYSTEM(world, NormalSystem, EcsOnUpdate, Position);

    ecs_set_interval(world, OnPeriodSystem, 0.5);

    ecs_progress(world, 0);

    test_int(on_period_count, 0);

    ecs_progress(world, 1.2);

    test_int(on_period_count, 1);

    ecs_progress(world, 0.5);

    test_int(on_period_count, 2);    

    ecs_fini(world);
}

void SystemPeriodic_disabled(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);

    ECS_ENTITY(world, e, Position);

    ECS_SYSTEM(world, NormalSystem, EcsOnUpdate, Position);

    ecs_progress(world, 0);

    test_int(normal_count, 1);

    ecs_enable(world, NormalSystem, false);

    ecs_progress(world, 0);

    test_int(normal_count, 1);

    ecs_enable(world, NormalSystem, true);

    ecs_progress(world, 0);

    test_int(normal_count, 2);

    ecs_fini(world);
}

void SystemPeriodic_disabled_feature(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);

    ECS_ENTITY(world, e, Position);

    ECS_SYSTEM(world, NormalSystem, EcsOnUpdate, Position);
    ECS_SYSTEM(world, NormalSystem2, EcsOnUpdate, Position);

    ECS_PREFAB(world, Type, NormalSystem, NormalSystem2);

    ecs_progress(world, 0);

    test_int(normal_count, 1);
    test_int(normal_count_2, 1);

    ecs_enable(world, Type, false);

    ecs_progress(world, 0);

    test_int(normal_count, 1);
    test_int(normal_count_2, 1);

    ecs_enable(world, Type, true);

    ecs_progress(world, 0);

    test_int(normal_count, 2);
    test_int(normal_count_2, 2);

    ecs_fini(world);
}

void SystemPeriodic_disabled_nested_feature(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);

    ECS_ENTITY(world, e, Position);

    ECS_SYSTEM(world, NormalSystem, EcsOnUpdate, Position);
    ECS_SYSTEM(world, NormalSystem2, EcsOnUpdate, Position);
    ECS_SYSTEM(world, NormalSystem3, EcsOnUpdate, Position);

    ECS_PREFAB(world, NestedType, NormalSystem2, NormalSystem3);
    ECS_PREFAB(world, Type, NormalSystem, NestedType);

    ecs_progress(world, 0);

    test_int(normal_count, 1);
    test_int(normal_count_2, 1);
    test_int(normal_count_3, 1);

    ecs_enable(world, Type, false);

    ecs_progress(world, 0);

    test_int(normal_count, 1);
    test_int(normal_count_2, 1);
    test_int(normal_count_3, 1);

    ecs_enable(world, Type, true);

    ecs_progress(world, 0);

    test_int(normal_count, 2);
    test_int(normal_count_2, 2);
    test_int(normal_count_3, 2);

    ecs_fini(world);
}

void TwoRefs(ecs_iter_t *it) {
    Position *p = ecs_field(it, Position, 1);
    Velocity *v = ecs_field(it, Velocity, 2);

    test_assert(!ecs_field_is_self(it, 1));
    test_assert(!ecs_field_is_self(it, 2));

    (void)p;
    (void)v;

    probe_iter(it);
}

void SystemPeriodic_two_refs(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);
    ECS_COMPONENT(world, Mass);

    ECS_ENTITY(world, e, Position, Velocity);
    ECS_ENTITY(world, E2, Mass);

    ECS_SYSTEM(world, TwoRefs, EcsOnUpdate, Position(e), Velocity(e), e(), Mass);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 1);
    test_int(ctx.invoked, 1);
    test_int(ctx.term_count, 4);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], e);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], e);
    test_int(ctx.c[0][2], e);
    test_int(ctx.s[0][2], 0);
    test_int(ctx.c[0][3], ecs_id(Mass));
    test_int(ctx.s[0][3], 0);

    test_int(ctx.e[0], E2);

    ecs_fini(world);
}

void SystemPeriodic_filter_disabled(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);

    ECS_ENTITY(world, Entity1, Position);
    ECS_ENTITY(world, Entity2, Position, Disabled);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 1);
    test_int(ctx.invoked, 1);
    test_int(ctx.term_count, 1);
    test_int(ctx.e[0], Entity1);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);

    ecs_fini(world);
}

void SystemPeriodic_match_disabled(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);

    ECS_ENTITY(world, Entity1, Position);
    ECS_ENTITY(world, Entity2, Position, Disabled);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, Disabled);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 1);
    test_int(ctx.invoked, 1);
    test_int(ctx.e[0], Entity2);
    test_int(ctx.term_count, 2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], EcsDisabled);
    test_int(ctx.s[0][1], 0);

    ecs_fini(world);
}

void SystemPeriodic_match_disabled_and_enabled(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);

    ECS_ENTITY(world, Entity1, Position);
    ECS_ENTITY(world, Entity2, Position, Disabled);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, ?Disabled);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 2);
    test_int(ctx.invoked, 2);
    test_int(ctx.e[0], Entity1);
    test_int(ctx.e[1], Entity2);
    test_int(ctx.term_count, 2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], EcsDisabled);
    test_int(ctx.s[0][1], 0);

    ecs_fini(world);
}

void SystemPeriodic_match_prefab(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);

    ECS_ENTITY(world, Entity1, Position);
    ECS_ENTITY(world, Entity2, Position, Prefab);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, Prefab);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 1);
    test_int(ctx.invoked, 1);
    test_int(ctx.e[0], Entity2);
    test_int(ctx.term_count, 2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], EcsPrefab);
    test_int(ctx.s[0][1], 0);

    ecs_fini(world);
}

void SystemPeriodic_match_prefab_and_normal(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);

    ECS_ENTITY(world, Entity1, Position);
    ECS_ENTITY(world, Entity2, Position, Prefab);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, ?Prefab);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 2);
    test_int(ctx.invoked, 2);
    test_int(ctx.e[0], Entity1);
    test_int(ctx.e[1], Entity2);
    test_int(ctx.term_count, 2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], EcsPrefab);
    test_int(ctx.s[0][1], 0);

    ecs_fini(world);
}

static
void TestIsSharedOnNotSet(ecs_iter_t *it) {
    test_assert(ecs_field_is_self(it, 2) != false);
}

void SystemPeriodic_is_shared_on_column_not_set(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);

    ECS_ENTITY(world, Entity, Position);

    ECS_SYSTEM(world, TestIsSharedOnNotSet, EcsOnUpdate, Position, ?Velocity);

    ecs_progress(world, 0);

    ecs_fini(world);
}


void SystemPeriodic_owned_column(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);
    ECS_COMPONENT(world, Mass);

    ECS_ENTITY(world, base, Velocity);
    ECS_ENTITY(world, e1, Position, Velocity);
    ECS_ENTITY(world, e2, Position, (IsA, base));

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, Velocity(self));

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 1);
    test_int(ctx.invoked, 1);
    test_int(ctx.term_count, 2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);
    test_int(ctx.e[0], e1);

    ecs_fini(world);
}

void SystemPeriodic_owned_not_column(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);

    ECS_ENTITY(world, base, Velocity);
    ECS_ENTITY(world, e1, Position, Velocity);
    ECS_ENTITY(world, e2, Position, (IsA, base));

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, !Velocity(self));

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 1);
    test_int(ctx.invoked, 1);
    test_int(ctx.term_count, 2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);
    test_int(ctx.e[0], e2);

    ecs_fini(world);
}

void OwnedOr(ecs_iter_t *it) {
    probe_iter(it);
}

void SystemPeriodic_owned_or_column(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);
    ECS_COMPONENT(world, Mass);

    ECS_ENTITY(world, base, Velocity);
    ECS_ENTITY(world, e1, Position, Velocity);
    ECS_ENTITY(world, e2, Position, Mass);
    ECS_ENTITY(world, e3, Position, (IsA, base));

    ECS_SYSTEM(world, OwnedOr, EcsOnUpdate, Position, Velocity(self) || Mass(self));

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 2);
    test_int(ctx.invoked, 2);
    test_int(ctx.term_count, 2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);
    test_int(ctx.e[0], e1);
    test_int(ctx.c[1][0], ecs_id(Position));
    test_int(ctx.s[1][0], 0);
    test_int(ctx.c[1][1], ecs_id(Mass));
    test_int(ctx.s[1][1], 0);
    test_int(ctx.e[1], e2);

    ecs_fini(world);
}

void SystemPeriodic_shared_column(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);

    ECS_ENTITY(world, base, Velocity);
    ECS_ENTITY(world, e1, Position, Velocity);
    ECS_ENTITY(world, e2, Position, (IsA, base));
    ECS_ENTITY(world, e3, Position);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, Velocity(up));

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 1);
    test_int(ctx.invoked, 1);
    test_int(ctx.term_count, 2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], base);
    test_int(ctx.e[0], e2);

    ecs_fini(world);
}

void SystemPeriodic_shared_not_column(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);

    ECS_ENTITY(world, base, Velocity);
    ECS_ENTITY(world, e1, Position, Velocity);
    ECS_ENTITY(world, e2, Position, (IsA, base));

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, !Velocity(up));

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 1);
    test_int(ctx.invoked, 1);
    test_int(ctx.term_count, 2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);
    test_int(ctx.e[0], e1);

    ecs_fini(world);
}

void SharedOr(ecs_iter_t *it) {
    probe_iter(it);
}

void SystemPeriodic_shared_or_column(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);
    ECS_COMPONENT(world, Mass);

    ECS_ENTITY(world, base1, Velocity);
    ECS_ENTITY(world, base2, Mass);
    ECS_ENTITY(world, e1, Position, Velocity);
    ECS_ENTITY(world, e2, Position, Mass);
    ECS_ENTITY(world, e3, Position, (IsA, base1));
    ECS_ENTITY(world, e4, Position, (IsA, base2));

    ECS_SYSTEM(world, SharedOr, EcsOnUpdate, Position, Velocity(up) || Mass(up));

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 2);
    test_int(ctx.invoked, 2);
    test_int(ctx.term_count, 2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], base1);
    test_int(ctx.e[0], e3);
    test_int(ctx.c[1][0], ecs_id(Position));
    test_int(ctx.s[1][0], 0);
    test_int(ctx.c[1][1], ecs_id(Mass));
    test_int(ctx.s[1][1], base2);
    test_int(ctx.e[1], e4);

    ecs_fini(world);
}

void SystemPeriodic_container_dont_match_inheritance(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);

    ECS_ENTITY(world, base, Velocity);
    ECS_ENTITY(world, e1, Position, (IsA, base));
    ECS_ENTITY(world, e2, Position, (ChildOf, base));

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, Velocity(parent));

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 1);
    test_int(ctx.invoked, 1);
    test_int(ctx.term_count, 2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], base);
    test_int(ctx.e[0], e2);

    ecs_fini(world);
}

void SystemPeriodic_cascade_dont_match_inheritance(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);

    ECS_ENTITY(world, base, Velocity);
    ECS_ENTITY(world, e1, Position, (IsA, base));
    ECS_ENTITY(world, e2, Position, (ChildOf, base));

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, ?Velocity(parent|cascade));

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 2);
    test_int(ctx.invoked, 2);
    test_int(ctx.term_count, 2);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);
    test_int(ctx.c[0][1], ecs_id(Velocity));
    test_int(ctx.s[0][1], 0);
    test_int(ctx.c[1][0], ecs_id(Position));
    test_int(ctx.s[1][0], 0);
    test_int(ctx.c[1][1], ecs_id(Velocity));
    test_int(ctx.s[1][1], base);    
    test_int(ctx.e[0], e1);
    test_int(ctx.e[1], e2);

    ecs_fini(world);
}

void SystemPeriodic_not_from_entity(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);

    ECS_ENTITY(world, e, Position);
    ECS_ENTITY(world, e2, 0);

    ECS_SYSTEM(world, Iter, EcsOnUpdate, Position, !Velocity(e2));

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 1);

    ecs_add(world, e2, Velocity);

    ecs_progress(world, 1);
    
    test_int(ctx.count, 1);

    ecs_fini(world);
}

static
void TestContext(ecs_iter_t *it) {
    void *world_ctx = ecs_get_ctx(it->world);
    test_assert(world_ctx == it->ctx);
    int32_t *ctx = it->ctx;
    (*ctx) ++;
}

void SystemPeriodic_sys_context(void) {
    ecs_world_t *world = ecs_init();
    int32_t param = 0;

    ECS_COMPONENT(world, Position);

    ECS_SYSTEM(world, TestContext, EcsOnUpdate, Position);

    ecs_system_init(world, &(ecs_system_desc_t){
        .entity = TestContext,
        .ctx = &param
    });

    test_assert(ecs_system_get_ctx(world, TestContext) == &param);

    ecs_fini(world);
}

void SystemPeriodic_get_sys_context_from_param(void) {
    ecs_world_t *world = ecs_init();
    int32_t param = 0;

    ECS_COMPONENT(world, Position);
    ECS_ENTITY(world, e, Position);

    ECS_SYSTEM(world, TestContext, EcsOnUpdate, Position);

    /* Set world context so system can compare if pointer is correct */
    ecs_set_ctx(world, &param, NULL);

    ecs_system_init(world, &(ecs_system_desc_t){
        .entity = TestContext,
        .ctx = &param
    });

    ecs_progress(world, 1);

    test_int(param, 1);

    ecs_fini(world);
}

static ecs_entity_t dummy_invoked = 0;

static void Dummy(ecs_iter_t *it) {
    test_assert(dummy_invoked == 0);
    dummy_invoked = it->entities[0];
}

void SystemPeriodic_owned_only(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);

    ECS_SYSTEM(world, Dummy, EcsOnUpdate, Position(self));

    ecs_entity_t e = ecs_new(world, Position);

    ecs_progress(world, 0);

    test_assert(dummy_invoked == e);

    ecs_fini(world);
}

static void AssertReadonly(ecs_iter_t *it) {
    test_assert(dummy_invoked == 0);
    dummy_invoked = it->entities[0];

    test_assert( ecs_field_is_readonly(it, 1) == true);
}

void SystemPeriodic_shared_only(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);

    ECS_SYSTEM(world, AssertReadonly, EcsOnUpdate, Position(up));

    ecs_entity_t base = ecs_new(world, Position);
    ecs_entity_t e = ecs_new_w_pair(world, EcsIsA, base);

    ecs_progress(world, 0);

    test_assert(dummy_invoked == e);

    ecs_fini(world);
}

void SystemPeriodic_is_in_readonly(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);

    ECS_SYSTEM(world, AssertReadonly, EcsOnUpdate, [in] Position);

    ecs_entity_t e = ecs_new(world, Position);

    ecs_progress(world, 0);

    test_assert(dummy_invoked == e);

    ecs_fini(world);
}

void SystemPeriodic_get_period(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);

    ECS_SYSTEM(world, Dummy, EcsOnUpdate, [in] Position);

    ecs_set_interval(world, Dummy, 10.0);

    test_flt( ecs_get_interval(world, Dummy), 10.0);

    ecs_fini(world);
}

void TypeSystem(ecs_iter_t *it) {
    probe_iter(it);
}

void SystemPeriodic_and_type(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);
    ECS_PREFAB(world, MyType, Position, Velocity);

    ECS_SYSTEM(world, TypeSystem, EcsOnUpdate, AND | MyType);

    ecs_new(world, Position);
    ecs_new(world, Velocity);
    ECS_ENTITY(world, e, Position, Velocity);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 1);
    test_int(ctx.invoked, 1);
    test_int(ctx.system, TypeSystem);
    test_int(ctx.term_count, 1);
    test_null(ctx.param);

    test_int(ctx.e[0], e);
    test_int(ctx.c[0][0], MyType);
    test_int(ctx.s[0][0], 0);

    ecs_fini(world);
}

void SystemPeriodic_or_type(void) {
    ecs_world_t *world = ecs_init();

    ECS_COMPONENT(world, Position);
    ECS_COMPONENT(world, Velocity);
    ECS_PREFAB(world, MyType, Position, Velocity);

    ECS_SYSTEM(world, TypeSystem, EcsOnUpdate, OR | MyType);

    ecs_entity_t e1 = ecs_new(world, Position);
    ecs_entity_t e2 = ecs_new(world, Velocity);
    ecs_entity_t e3 = ecs_new(world, Position);
    ecs_add(world, e3, Velocity);

    Probe ctx = {0};
    ecs_set_ctx(world, &ctx, NULL);

    ecs_progress(world, 1);

    test_int(ctx.count, 3);
    test_int(ctx.invoked, 3);
    test_int(ctx.system, TypeSystem);
    test_int(ctx.term_count, 1);
    test_null(ctx.param);

    test_int(ctx.e[0], e1);
    test_int(ctx.e[1], e2);
    test_int(ctx.e[2], e3);
    test_int(ctx.c[0][0], ecs_id(Position));
    test_int(ctx.c[1][0], ecs_id(Velocity));
    test_int(ctx.c[2][0], ecs_id(Position));
    test_int(ctx.s[0][0], 0);

    ecs_fini(world);
}