Verify that if an OBJECT cannot be rendered, the element's contents are displayed.
Test for assertion 13.3.1-1

The word "ONE" must be rendered after this sentence. Since the object does not exist, the text in the OBJECT element must be displayed.

ONE

The word "TWO" must be rendered after this sentence. Since the object does not exist, the text in the OBJECT element must be displayed.

TWO

There shall be a PNG image rendered after this sentence. If not, then this test fails.

This test fails!