Add launchpad renderer

project.clj

@@ -3,5 +3,7 @@
   :url "http://example.com/FIXME"
   :license {:name "Eclipse Public License"
             :url "http://www.eclipse.org/legal/epl-v10.html"}
-  :dependencies [[org.clojure/clojure "1.8.0"]]
-  :main game-of-life.core)
+  :main ^:skip-aot game-of-life.core
+  :dependencies [[org.clojure/clojure "1.8.0"]
+                 [clj-launchpad "0.3.2"]
+                 [circleci/bond "0.2.9"]])

src/game_of_life/core.clj

@@ -1,26 +1,17 @@
 (ns game-of-life.core
-    (:require [game-of-life.game :refer :all]))
+    (:require [game-of-life.game :refer :all]
+              [game-of-life.renderer :as r]
+              [clj-launchpad :as launchpad]))
 
-(def initial-grid
-  (random-grid 80 60 0.4))
-
-(defn clear
-  []
-  (print (str (char 27) "[2J"))) ; clear screen
+(def lpad (launchpad/open))
 
-(defn render
-  [grid cell empty]
-  (print (str (char 27) "[;H")) ; move cursor to the top left corner of the screen
-  (println (to-string grid cell empty)))
+(def initial-grid
+  (random-grid 9 8 0.35))
 
 (defn -main
   "Run some thing!"
   []
-  (let [emoji "◻️"]
-    (clear)
-    (render initial-grid emoji " ")
-    (Thread/sleep 1000)
-    (loop [grid initial-grid]
-      (render grid emoji " ")
-      (Thread/sleep 100)
-      (recur (game-step grid)))))
+  (loop [grid initial-grid]
+    (r/draw-grid lpad grid)
+    (Thread/sleep 100)
+    (recur (game-step grid))))

src/game_of_life/renderer.clj

@@ -0,0 +1,13 @@
+(ns game-of-life.renderer
+  (:require [clj-launchpad :as launchpad]
+            [game-of-life.game :as game]))
+
+(defn draw-grid
+  "Draws a grid on the launchpad"
+  [device grid]
+  (game/grid-map
+    (fn [x y v]
+      (if (true? v)
+        (launchpad/draw-grid device x y :green)
+        (launchpad/draw-grid device x y :off)))
+    grid))

test/game_of_life/renderer_test.clj

@@ -0,0 +1,38 @@
+(ns game-of-life.renderer-test
+  (:require [clojure.test :refer :all]
+            [bond.james :as bond :refer [with-stub]]
+            [game-of-life.renderer :as renderer]
+            [clj-launchpad :as launchpad]))
+
+(def lpad :lpad)
+
+(deftest renderer-test
+  (testing "lights up top left corner light"
+    (with-stub [[launchpad/draw-grid (fn [& args] args)]]
+      (let [initial-grid [[true false]
+                          [false false]]]
+        (renderer/draw-grid lpad initial-grid)
+        (is (= '(:lpad 0 0 :green) (-> launchpad/draw-grid bond/calls (nth 0) :args)))
+        (is (= '(:lpad 1 0 :off) (-> launchpad/draw-grid bond/calls (nth 1) :args)))
+        (is (= '(:lpad 0 1 :off) (-> launchpad/draw-grid bond/calls (nth 2) :args)))
+        (is (= '(:lpad 1 1 :off) (-> launchpad/draw-grid bond/calls (nth 3) :args))))))
+
+  (testing "lights up bottom right corner"
+    (with-stub [[launchpad/draw-grid (fn [& args] args)]]
+      (let [initial-grid [[false false]
+                          [false true]]]
+        (renderer/draw-grid lpad initial-grid)
+        (is (= '(:lpad 0 0 :off) (-> launchpad/draw-grid bond/calls (nth 0) :args)))
+        (is (= '(:lpad 1 0 :off) (-> launchpad/draw-grid bond/calls (nth 1) :args)))
+        (is (= '(:lpad 0 1 :off) (-> launchpad/draw-grid bond/calls (nth 2) :args)))
+        (is (= '(:lpad 1 1 :green) (-> launchpad/draw-grid bond/calls (nth 3) :args))))))
+
+  (testing "lights up bottom right and top left"
+    (with-stub [[launchpad/draw-grid (fn [& args] args)]]
+      (let [initial-grid [[true false]
+                          [false true]]]
+        (renderer/draw-grid lpad initial-grid)
+        (is (= '(:lpad 0 0 :green) (-> launchpad/draw-grid bond/calls (nth 0) :args)))
+        (is (= '(:lpad 1 0 :off) (-> launchpad/draw-grid bond/calls (nth 1) :args)))
+        (is (= '(:lpad 0 1 :off) (-> launchpad/draw-grid bond/calls (nth 2) :args)))
+        (is (= '(:lpad 1 1 :green) (-> launchpad/draw-grid bond/calls (nth 3) :args)))))))