current property Null safety
Returns handle for the currently running test.
This must be called from within the zone that the test is running in. If the current zone is not a test's zone throws OutsideTestException.
Implementation
static TestHandle get current {
final invoker = Invoker.current;
if (invoker == null) throw OutsideTestException();
return TestHandle._(
invoker, StackTraceFormatter.current ?? _defaultFormatter);
}