ft span-top', 'left span-bottom');
test_computed_value('flip-inline', 'position-area', 'left span-top', 'right span-top');
test_computed_value('flip-start', 'position-area', 'span-block-start inline-end', 'end span-start');

// Writing modes:
test_computed_value('flip-block', 'position-area', 'left top', 'right top', 'ltr', 'vertical-rl');

test_computed_value('', 'position-area', 'x-start y-start', 'x-start y-start', 'rtl');
test_computed_value('flip-block', 'position-area', 'x-start y-start', 'x-start y-e