Additional messages can be logged during a test case.
All these macros allow heterogenous sequences of values to be streaming using the insertion operator (<<) in the same way that std::ostream, std::cout, etc support it.
E.g.:
INFO( "The number is " << i );(Note that there is no initial << - instead the insertion sequence is placed in parentheses.)
These macros come in three forms:
INFO( message expression )
The message is logged to a buffer, but only reported with the next assertion that is logged. This allows you to log contextual information in case of failures which is not shown during a successful test run (for the console reporter, without -s). Messages are removed from the buffer at the end of their scope, so may be used, for example, in loops.
WARN( message expression )
The message is always reported but does not fail the test.
FAIL( message expression )
The message is reported and the test case fails.
CAPTURE( expression )
Sometimes you just want to log the name and value of a variable. While you can easily do this with the INFO macro, above, as a convenience the CAPTURE macro handles the stringising of the variable name for you (actually it works with any expression, not just variables).
E.g.
CAPTURE( theAnswer );This would log something like:
"theAnswer := 42"
SCOPED_INFO and SCOPED_CAPTURE
These macros are now deprecated and are just aliases for INFO and CAPTURE (which were not previously scoped).