ProgressReporter is designed for interactive use. Its goal is to
give you actionable insights to help you understand the status of your
code. This reporter also praises you from time-to-time if all your tests
pass. It's the default reporter for test_dir().
ParallelProgressReporter is very similar to ProgressReporter, but
works better for packages that want parallel tests.
CompactProgressReporter is a minimal version of ProgressReporter
designed for use with single files. It's the default reporter for
test_file().
Other reporters:
CheckReporter,
DebugReporter,
FailReporter,
JunitReporter,
ListReporter,
LocationReporter,
MinimalReporter,
MultiReporter,
RStudioReporter,
Reporter,
SilentReporter,
StopReporter,
SummaryReporter,
TapReporter,
TeamcityReporter