[R] NAMESPACE and tests for unexported functions

[Paul Roebuck]

How do you get around the problem of having tests for
functions that are not exported in NAMESPACE? It seems
rather self-defeating to have to export everything so
that 'R CMD CHECK pkg' won't crash when it encounters
a test case for an internal function. I don't want
someone using the package to call the function, but the
package itself should be able to see its own contents.

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SIGSIG -- signature too long (core dumped)