Testing touch-action: manipulation;
PASS window.getComputedStyle(document.body).getPropertyValue('touch-action') is 'manipulation'
Testing touch-action: auto;
PASS window.getComputedStyle(document.body).getPropertyValue('touch-action') is 'auto'
Testing a bogus value
PASS window.getComputedStyle(document.body).getPropertyValue('touch-action') is 'auto'
Testing all caps
PASS window.getComputedStyle(document.body).getPropertyValue('touch-action') is 'manipulation'
Testing weird casing
PASS window.getComputedStyle(document.body).getPropertyValue('touch-action') is 'auto'
Testing !important (auto)
PASS window.getComputedStyle(document.body).getPropertyValue('touch-action') is 'auto'
Testing !important (manipulation)
PASS window.getComputedStyle(document.body).getPropertyValue('touch-action') is 'manipulation'
Testing non-inheritance
PASS window.getComputedStyle(document.getElementById('child')).getPropertyValue('touch-action') is 'auto'
PASS successfullyParsed is true

TEST COMPLETE
Testing the computed style of touch-action:

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