Test that gradient offset values less than zero are rounded up to zero and values more than one are rounded down to one.
The test defines four gradients, each with a single stop where the 'stop-color' is set to 'blue'. The four gradients have 'offset' set to '-1', '-1%', '101%' and '2'. Four rectangles reference the gradients. All of these should render as if they have plain blue fills.
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The test passed if there are four blue boxes on the page.