add an overflow about equal test
add message tests
add notaboutequal tests
implement not about equal
clean up dev notes
unify test method names for asserttrue and assertfalse
further method unification
add test base class to factor out common logic
factor assert true commonality into header file
abstract asserttrue test assertions into helper methods
abstract function choice per test
rename test base class
inherit assertfalse tests from asserttrue tests to remove redundancy
inherit ignore tests from assertion test base
inherit fail tests from assertion test base and add marks to ignore tests
unify assertnull and assertnotnull test methods
factor null and notnull tests into a shared set
move makevalue test file