Add some tests for game

Author: janza

lib/game.js

@@ -1,11 +1,11 @@
-
-
-module.exports = (getBallLevel) => {
+module.exports = (getBallLevel, sleepFunction) => {
   getBallLevel = getBallLevel || (level => Math.floor(Math.random() * level))
+  sleepFunction = sleepFunction || (cb => setTimeout(cb, 300))
 
   const thresholds = [0, 0, 5, 30, 90, 150, 230, 280, 350, 450]
   var blocksKilled = 0
   var updateCallback = () => {}
+  var queuedUpdate = null
   var dotsId = 0
   var state = {
     dots: [],
@@ -30,7 +30,11 @@ module.exports = (getBallLevel) => {
 
   function setState (newState) {
     state = Object.assign({}, state, newState)
-    updateCallback(newState)
+    if (queuedUpdate) return
+    queuedUpdate = setTimeout(() => {
+      updateCallback(state)
+      queuedUpdate = null
+    })
   }
 
   function newDot (x, level) {
@@ -52,7 +56,6 @@ module.exports = (getBallLevel) => {
       return
     }
     setState({
-      ...state,
       floatingDots: state.floatingDots.map(d => {
         return {
           ...d,
@@ -142,15 +145,14 @@ module.exports = (getBallLevel) => {
       }
     }
 
-    const newDots = dots.filter(d => keep[d.x][d.y]).concat(freshDots)
-    return newDots
+    return dots.filter(d => keep[d.x][d.y]).concat(freshDots)
   }
 
   function updateScore (score) {
-    if (typeof window === 'undefined') return
     const highScore = Math.max(score, state.highScore)
+    setState({ score, highScore })
+    if (typeof window === 'undefined') return
     window.localStorage['score'] = highScore
-    setState({ highScore, score })
   }
 
   function moveDotsRight () {
@@ -188,19 +190,17 @@ module.exports = (getBallLevel) => {
       }
     })
     setState({
-      ...state,
       dots: inactiveDots.concat(newDots),
       floatingDots: []
     })
-    setTimeout(() => cleanupBoard([], state.dots), 300)
+    sleepFunction(() => cleanupBoard([], state.dots))
   }
 
   function cleanupBoard (oldRun, newRun) {
     oldRun = newRun
     newRun = cleanupDots(oldRun)
     const level = thresholds.findIndex(l => l > blocksKilled)
     setState({
-      ...state,
       level: level < 0 ? colors.length - 1 : level,
       dots: newRun
     })
@@ -213,18 +213,16 @@ module.exports = (getBallLevel) => {
         })
       }
       return setState({
-        ...state,
         floatingDots: [newDot(4), newDot(5)]
       })
     }
-    setTimeout(() => {
+    sleepFunction(() => {
       newRun = settleDots(newRun)
       setState({
-        ...state,
         dots: newRun
       })
-      setTimeout(() => cleanupBoard(oldRun, newRun), 300)
-    }, 300)
+      sleepFunction(() => cleanupBoard(oldRun, newRun))
+    })
   }
 
   function rotateDots () {
@@ -287,7 +285,6 @@ module.exports = (getBallLevel) => {
       }))
     }
     setState({
-      ...state,
       floatingDots: newFloatingDots
     })
   }