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(import test
(only (list-utils alist) plist->alist))
(include "entity.scm")
(include "tilemap.scm")
(include "world.scm")
(include "animation.scm")
(import (downstroke entity) (downstroke world) (downstroke animation))
;; Test helpers: construct alist entities / animation defs from readable plist kwargs.
(define (entity . kws) (plist->alist kws))
(define (anim . kws) (plist->alist kws))
(test-begin "animation")
(test-group "frame->tile-id"
(test-group "tile IDs only"
(test "first frame, frames (0)" 0 (frame->tile-id '(0) 0))
(test "wraps around" 0 (frame->tile-id '(0 1) 2))
(test "frame 1 of (27 28)" 28 (frame->tile-id '(27 28) 1)))
(test-group "tile IDs and durations"
(test "first frame, frames (0)" 0 (frame->tile-id '((0 10)) 0))
(test "wraps around" 0 (frame->tile-id '((0 10) (1 10)) 2))
(test "frame 1 of (27 28)" 28 (frame->tile-id '((27 10) (28 10)) 1))))
(test-group "frame->duration"
(test "first frame, frames (0)" 100 (frame->duration '((#:frames . ((0 100))))
0))
(test "wraps around" 100 (frame->duration '((#:frames . ((0 100) (1 200))))
0))
(test "frame 1 of (27 28)" 200 (frame->duration '((#:frames . ((27 100) (28 200))))
1))
)
(test-group "set-animation"
(let ((e (entity #:type 'player #:anim-name 'idle #:anim-frame 5 #:anim-tick 8)))
(test "no-op if already active" e (set-animation e 'idle))
(let ((switched (set-animation e 'walk)))
(test "switches anim-name" 'walk (entity-ref switched #:anim-name))
(test "resets frame" 0 (entity-ref switched #:anim-frame))
(test "resets tick" 0 (entity-ref switched #:anim-tick)))))
(test-group "animate-entity"
(test-group "Single frames"
(let* ((anims (list (anim #:name 'walk #:frames '(2 3) #:duration 4)))
(e (entity #:type 'player #:anim-name 'walk #:anim-frame 0 #:anim-tick 0))
(stepped (animate-entity e anims 1)))
(test "increments tick" 1 (entity-ref stepped #:anim-tick))
(test "sets tile-id on first tick" 2 (entity-ref stepped #:tile-id)))
(let* ((anims (list (anim #:name 'walk #:frames '(0 1) #:duration 2)))
(e (entity #:type 'player #:anim-name 'walk #:anim-frame 0 #:anim-tick 1))
(advanced (animate-entity e anims 200)))
(test "advances frame when tick reaches duration" 1 (entity-ref advanced #:anim-frame))
(test "resets tick on frame advance" 0 (entity-ref advanced #:anim-tick))))
(test-group "Frames with duration"
(let* ((anims (list (anim #:name 'walk #:frames '((0 10) (1 20)) #:duration 4)))
(e (entity #:type 'player #:anim-name 'walk #:anim-frame 0 #:anim-tick 9))
(stepped (animate-entity e anims 200)))
(test "ticks resets on frame switch" 0 (entity-ref stepped #:anim-tick))
(test "sets tile-id on 10th tick" 1 (entity-ref stepped #:tile-id))
(test "sets duration to frame duration" 20 (entity-ref stepped #:duration))))
(test-group "Empty"
(let* ((e (entity #:type 'player)))
(test "unchanged entity without anim-name" e (animate-entity e '() 1)))))
(test-group "animation pipeline"
(test-group "animated entity"
(let* ((anims (list (anim #:name 'walk #:frames '(2 3) #:duration 4)))
(e (entity #:type 'player #:anim-name 'walk #:anim-frame 0 #:anim-tick 0 #:animations anims))
(stepped-entity (apply-animation #f e 10)))
(test "Updated animated entity" 10 (entity-ref stepped-entity #:anim-tick)))
(let* ((e (entity #:type 'static))
(stepped-entity (apply-animation #f e 10)))
(test "unchanged static entity" #f (entity-ref stepped-entity #:anim-tick)))))
(test-end "animation")
(test-exit)
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