Make test a bit informative.
Extract getConstructorName function out from defaultStringifier
isComparedByValue would be a better name
Just reordered
Just reordered again
Export and test constructorNameOf function
More tests
Export and test typeNameOf function
Export and test isComparedByValue function
Parameterized test to eliminate duplication.
Delete  duplicated isComparedByValue function
Everything is just comparable (by val or by ref).
Enclose in suite
Add types_and_values_test.js to browser test suite.