Test that a 'pattern' element can inherit attributes through multiple levels of 'xlink:href' referencing.
The test defines a pattern 'pattern1' with some attributes that scale the contents. The attributes on 'pattern1' are inherited into 'pattern2' and then inherited from 'pattern2' into 'pattern3'. 'pattern3' has a green circle as its graphical content. A 'rect' uses 'pattern3' as its fill, if the attributes are correctly inherited into 'pattern3', then the green circle will occlude a red circle in the same position.
Run the test. No interaction required.
The test passed if there is no red visible on the page.