Add ImageSpec tests

scripts/image_spec.lua

@@ -0,0 +1,46 @@
+-- Copyright (C) 2018  David Capello
+--
+-- This file is released under the terms of the MIT license.
+-- Read LICENSE.txt for more information.
+
+do
+  local spec = ImageSpec{colorMode=ColorMode.GRAYSCALE, width=32, height=64, transparentColor=2}
+  assert(spec.colorMode == ColorMode.GRAYSCALE)
+  assert(spec.width == 32)
+  assert(spec.height == 64)
+  assert(spec.transparentColor == 2)
+end
+
+do
+  local sprite = Sprite(32, 64, ColorMode.INDEXED)
+  assert(sprite.width == 32)
+  assert(sprite.height == 64)
+  assert(sprite.colorMode == ColorMode.INDEXED)
+
+  local sprite2 = Sprite(sprite.spec)
+  assert(sprite2.width == 32)
+  assert(sprite2.height == 64)
+  assert(sprite2.colorMode == ColorMode.INDEXED)
+
+  local spec = sprite.spec
+  assert(spec.width == 32)
+  assert(spec.height == 64)
+  assert(spec.colorMode == ColorMode.INDEXED)
+
+  spec.width = 30
+  spec.height = 40
+  spec.colorMode = ColorMode.RGB
+  assert(spec.width == 30)
+  assert(spec.height == 40)
+  assert(spec.colorMode == ColorMode.RGB)
+
+  local image = Image(spec)
+  assert(image.width == 30)
+  assert(image.height == 40)
+  assert(image.colorMode == ColorMode.RGB)
+
+  print(image.spec.width, image.spec.height, image.spec.colorMode)
+  assert(image.spec.width == 30)
+  assert(image.spec.height == 40)
+  assert(image.spec.colorMode == ColorMode.RGB)
+end