[syntax] test-result-ref runner pname [default]
SRFI-64: returns the value of the test result property named pname.
If there is no property named pname, returns default, or #f if default is not specified.
Standard test result properties are:
The result kind, as defined in test-result-kind. (test-result-kind runner) is equivalent to (test-result-ref runner 'result-kind).
The Source file of test suite. (if known)
The location of test statement (test-assert etc.). (if known)
The Source form of expression. (if meaningful and known)
The expected non-error result. (if meaningful and known)
err-type specified in test-error. (if meaningful and known)
The actual non-error result. (if meaningful and known)
The actual error, if an error was signaled and is known. This values is implementation-dependent.