Create blocks of tests in image.lua

scripts/image.lua

@@ -3,51 +3,59 @@
 -- This file is released under the terms of the MIT license.
 -- Read LICENSE.txt for more information.
 
+local pc = app.pixelColor
+
 local a = Image(32, 64)
 assert(a.width == 32)
 assert(a.height == 64)
 assert(a.colorMode == ColorMode.RGB) -- RGB by default
 
-local b = Image(32, 64, ColorMode.INDEXED)
-assert(b.width == 32)
-assert(b.height == 64)
-assert(b.colorMode == ColorMode.INDEXED)
+do
+   local b = Image(32, 64, ColorMode.INDEXED)
+   assert(b.width == 32)
+   assert(b.height == 64)
+   assert(b.colorMode == ColorMode.INDEXED)
+end
 
 -- Get/put RGBA pixels
-local pc = app.pixelColor
-for y=0,a.height-1 do
-   for x=0,a.width-1 do
-      a:putPixel(x, y, pc.rgba(x, y, x+y, x-y))
+do
+   for y=0,a.height-1 do
+      for x=0,a.width-1 do
+         a:putPixel(x, y, pc.rgba(x, y, x+y, x-y))
+      end
    end
 end
 
 -- Clone
-local c = a:clone()
-assert(c.width == 32)
-assert(c.height == 64)
-assert(c.colorMode == ColorMode.RGB)
+do
+   local c = a:clone()
+   assert(c.width == 32)
+   assert(c.height == 64)
+   assert(c.colorMode == ColorMode.RGB)
 
--- Get RGB pixels
-for y=0,c.height-1 do
-   for x=0,c.width-1 do
-      assert(c:getPixel(x, y) == pc.rgba(x, y, x+y, x-y))
+   -- Get RGB pixels
+   for y=0,c.height-1 do
+      for x=0,c.width-1 do
+         assert(c:getPixel(x, y) == pc.rgba(x, y, x+y, x-y))
+      end
    end
 end
 
 -- Patch
-local pc = app.pixelColor
-local spr = Sprite(256, 256)
-local image = app.site.image
-local copy = image:clone()
-assert(image:getPixel(0, 0) == 0)
-for y=0,copy.height-1 do
-   for x=0,copy.width-1 do
-      copy:putPixel(x, y, pc.rgba(255-x, 255-y, 0, 255))
+do
+   local spr = Sprite(256, 256)
+   local image = app.site.image
+   local copy = image:clone()
+   assert(image:getPixel(0, 0) == 0)
+   for y=0,copy.height-1 do
+      for x=0,copy.width-1 do
+         copy:putPixel(x, y, pc.rgba(255-x, 255-y, 0, 255))
+      end
    end
+   image:putImage(copy)
+   assert(image:getPixel(0, 0) == pc.rgba(255, 255, 0, 255))
+   assert(image:getPixel(255, 255) == pc.rgba(0, 0, 0, 255))
+   app.undo()
+   assert(image:getPixel(0, 0) == pc.rgba(0, 0, 0, 0))
+   assert(image:getPixel(255, 255) == pc.rgba(0, 0, 0, 0))
 end
-image:putImage(copy)
-assert(image:getPixel(0, 0) == pc.rgba(255, 255, 0, 255))
-assert(image:getPixel(255, 255) == pc.rgba(0, 0, 0, 255))
-app.undo()
-assert(image:getPixel(0, 0) == pc.rgba(0, 0, 0, 0))
-assert(image:getPixel(255, 255) == pc.rgba(0, 0, 0, 0))