Test that setting and getting align-content works as expected


PASS Test getting align-content values previously set through CSS.
PASS Test setting invalid values to align-content through CSS.
PASS Test initial value of align-content through JS
PASS Test getting and setting align-content through JS
PASS Test bad combinations of align-content
PASS Test the value 'initial'
PASS Test the value 'initial' for grid containers
PASS Test the value 'initial' for flex containers
PASS Test the value 'inherit'