Test that line-height in font shorthands cascades correctly.

On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".


PASS lineHeight(system_font_1) is '100px'
PASS lineHeight(system_font_2) is '16px'
PASS lineHeight(shorthand_normal_1) is '100px'
PASS lineHeight(shorthand_normal_2) is '12px'
PASS lineHeight(shorthand_line_height_1) is '100px'
PASS lineHeight(shorthand_line_height_2) is '200px'
PASS successfullyParsed is true

TEST COMPLETE