The 'log level' parameter

Parameter Name:

The unit test framework log level

Environment variable name:

BOOST_TEST_LOG_LEVEL

Command line argument name:

log_level

Acceptable Values:

all	- report all log messages including the passed test notification
success	- the same as all
test_suite	- show test suite messages
messages	- show user messages
warnings	- report warnings issued by user
all_errors	- report all error conditions
cpp_exception	- report uncaught c++ exception
system_errors	- report system originated non-fatal errors (for example, timeout or floating point exception)
fatal_errors	- report only user or system originated fatal errors (for example, memory access violation)
progress	- report only progress information: number of run test cases vs. overall number of test cases
nothing	- does not report any information

Description:

allows to set the unit test framework log level in a range of a complete log, when all successful tests are confirmed and all test suite messages are included, to an empty log when nothing is logged a test output stream. Note that log levels are accumulating, in other words each log level includes also all the information reported by less restrictive ones.