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Canvas - A QUnit Addon For Testing Canvas Rendering
================================

This addon for QUnit adds a pixelEqual method that allows you to assert
individual pixel values in a given canvas.

Usage:

    pixelEqual(canvas, x, y, r, g, b, a, message)

Where:

  * canvas: Reference to a canvas element
  * x, y: Coordinates of the pixel to test
  * r, g, b, a: The color and opacity value of the pixel that you except
  * message: Optional message, same as for other assertions