PASS: 'initial' parsed as 'initial' and computed to 'normal'
PASS: 'inherit' parsed as 'inherit' and computed to 'normal'
PASS: 'normal' parsed as 'normal' and computed to 'normal'
PASS: 'large' parsed as '' and computed to 'normal'
PASS: '25px' parsed as '' and computed to 'normal'
PASS: 'normal normal' parsed as '' and computed to 'normal'
PASS: 'normal no-common-ligatures' parsed as '' and computed to 'normal'

PASS: 'no-common-ligatures' parsed as 'no-common-ligatures' and computed to 'no-common-ligatures'
PASS: 'common-ligatures' parsed as 'common-ligatures' and computed to 'common-ligatures'
PASS: 'no-discretionary-ligatures' parsed as 'no-discretionary-ligatures' and computed to 'no-discretionary-ligatures'
PASS: 'discretionary-ligatures' parsed as 'discretionary-ligatures' and computed to 'discretionary-ligatures'
PASS: 'no-historical-ligatures' parsed as 'no-historical-ligatures' and computed to 'no-historical-ligatures'
PASS: 'historical-ligatures' parsed as 'historical-ligatures' and computed to 'historical-ligatures'

PASS: 'no-common-ligatures no-common-ligatures' parsed as '' and computed to 'normal'
PASS: 'common-ligatures no-discretionary-ligatures' parsed as 'common-ligatures no-discretionary-ligatures' and computed to 'common-ligatures no-discretionary-ligatures'
PASS: 'common-ligatures no-discretionary-ligatures historical-ligatures' parsed as 'common-ligatures no-discretionary-ligatures historical-ligatures' and computed to 'common-ligatures no-discretionary-ligatures historical-ligatures'
PASS: 'common-ligatures no-discretionary-ligatures normal' parsed as '' and computed to 'normal'