Tests and csm build options

README.org

@@ -71,4 +71,5 @@ The following Chicken dependencies are required:
 - SRFI-113
 - SRFI-69
 - csm
+- SRFI-78
 

all.options

@@ -0,0 +1 @@
+-static -L /usr/local/lib64/libraylib.a

engine/core.scm

@@ -101,7 +101,7 @@
   (add-queued-entities))
 
 ;; Entity creation/removal interface
-(export create-named-entity create-entity remove-entity)
+(export create-named-entity create-entity remove-entity clear-world)
 
 ;; Create an entity in the world and return it's ID
 (define (create-named-entity id . components)
@@ -323,12 +323,17 @@
 	  event)
 	#f)))
 
-;; Frame generation interface
-(export next-frame)
+;; Frame generation and game loop
+(export resolve-queues next-frame)
+
+;; Resolve the entity and system queues. This is exported which allows breaking iteration
+(define (resolve-queues)
+  (resolve-entity-queue)
+  (resolve-system-queue))
+
 ;; Generate the next frame, for use in the main game loop
 (define (next-frame)
-  (resolve-entity-queue)
-  (resolve-system-queue)
+  (resolve-queues)
   (with-drawing
    (execute-systems)))
 )

test/engine.scm

@@ -0,0 +1,37 @@
+(module (test engine) ()
+(import scheme
+	(chicken base)
+	(engine core)
+	(srfi 69)
+	(srfi 78)
+	(srfi 99))
+
+(define-record-type <point> (make-point x y) point? (x point-x) (y point-y))
+
+;; Entity addition and world state modification
+(check (hash-table-size world) => 0) ;; World state starts empty
+(check (hash-table-size component-sets) => 0)
+
+(create-named-entity 'ball (make-point 1 1))
+(check (hash-table-size world) => 0) ;; World state empty before next frame
+(check (hash-table-size component-sets) => 0)
+
+(resolve-queues) ;; TODO: swap this for (next-frame) and remove (resolve-queues) once we have a full game loop setup
+(check (hash-table-size world) => 1) ;; World state updates after next frame
+(check (hash-table-size component-sets) => 1)
+(check (hash-table-exists? world 'ball) => #t)
+(check (hash-table-exists? component-sets '<point>) => #t)
+
+(clear-world)
+(check (hash-table-size world) => 1) ;; World state does not immediately clear
+
+(resolve-queues)
+(check (hash-table-size world) => 0) ;; World state is empty after clear
+(check (hash-table-size component-sets) => 1) ;; Component-sets doesn't clear
+
+(create-named-entity 'ball (make-point 1 1))
+(resolve-queues)
+(remove-entity 'ball)
+(resolve-queues)
+(check (hash-table-size world) => 0) ;; Entity is properly removed
+)