This reporter quietly runs all tests, simply gathering all expectations.
This is helpful for programmatically inspecting errors after a test run.
You can retrieve the results with $expectations().
Other reporters:
CheckReporter,
DebugReporter,
FailReporter,
JunitReporter,
ListReporter,
LocationReporter,
MinimalReporter,
MultiReporter,
ProgressReporter,
RStudioReporter,
Reporter,
SlowReporter,
StopReporter,
SummaryReporter,
TapReporter,
TeamcityReporter