function

test.setSystemTime

function setSystemTime(
now?: string | number | Date
): void;

Control the system time used by:

  • Date.now()
  • new Date()
  • Intl.DateTimeFormat().format()

The real time is restored when the test file ends, unless a preload set the time.

@param now

The time to set the system time to. If omitted, the system time is reset