Test viewer capility to recognize and effect picture behavior request on a basic CGM-to-CGM link, for picture behavior "_replace".
At the start of the test, the right-hand frame should display a WebCGM instance containing a simple picture with three objects: a magenta rectangle, a cyan circle, and a red triangle, all with thick black borders. The magenta rectangle object (APS) contains a hyperlink to another local, one-picture WebCGM instance, that contains a drawing of a set of cylinders. The hyperlink is a 'linkuri' APS attribute, and the picture behavior "_replace" is contained on a "#" fragment on the URI parameter. No object selection or object behavior parameters are associated with the 'linkuri'.
A mouse click anywhere over the magenta rectangle (labelled "first object") should cause the hyperlink to be executed. This should result in the entire target WebCGM picture to be displayed in the right-hand frame, replacing the initial display of the 3 simple objects.
The initial view in the left-hand frame is a PNG reference image of the target WebCGM picture that should appear in the right-hand frame, after link activation. There should be no significant visual deviation between the reference image of the left frame and the view in the right frame after link activation.