1// The time values returned when calling the now method MUST be monotonically increasing and not subject to system clock adjustments or system clock skew. 2test(function() { 3 assert_true(self.performance.now() > 0, "self.performance.now() returns positive numbers"); 4}, "self.performance.now() returns a positive number"); 5 6// The difference between any two chronologically recorded time values returned from the now method MUST never be negative. 7test(function() { 8 var now1 = self.performance.now(); 9 var now2 = self.performance.now(); 10 assert_true((now2-now1) >= 0, "self.performance.now() difference is not negative"); 11 }, 12 "self.performance.now() difference is not negative" 13); 14