codecombat/test/app/lib/surface/scale-testing-utils.coffee

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module.exports.hitTest = (stage, bounds) ->
tests = hits = 0
for x in _.range(bounds.x, bounds.x + bounds.width, 5)
for y in _.range(bounds.y, bounds.y + bounds.height, 5)
tests += 1
objects = stage.getObjectsUnderPoint(x, y)
hasSprite = _.any objects, (o) -> o instanceof createjs.Sprite
hasShape = _.any objects, (o) -> o instanceof createjs.Shape
hits += 1 if (hasSprite and hasShape) or not (hasSprite or hasShape)
g = new createjs.Graphics()
if hasSprite and hasShape
g.beginFill(createjs.Graphics.getRGB(64,64,255,0.7))
else if not (hasSprite or hasShape)
g.beginFill(createjs.Graphics.getRGB(64,64,64,0.7))
else
g.beginFill(createjs.Graphics.getRGB(255,64,64,0.7))
g.drawCircle(0, 0, 2)
s = new createjs.Shape(g)
s.x = x
s.y = y
stage.addChild(s)
return hits/tests