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The predicate run_tests/2 is synchronized. Concurrent testing may be achieved using the relevant options. See set_test_options/1. Options are passed to set_test_options/1. In addition the following options are processed:
|- is either a single specification or a list of
specifications. Each single specification is either the name of a
test-unit or a term <test-unit>:<test>, denoting a single test
within a unit. If TestSet is
all, all known tests are executed.