More numeric tests

[Brian T. Rice]

This is applied now. Thanks!

Ken Causey wrote:

> OK, this patch fills in the last remaining existing test method that was
> blank.  There are plenty of more numeric tests that could be written,
> but at least now 21 tests really means 21 tests.  (although really each
> of these tests contain multiple assertions, but anyway)
> 
> At this point excepting the SUnit tests, all suites pass and have actual
> tests in each method.
> 
> Ken

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