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Testing of mpfr maxnum and minnum functions
-------------------------------------------
>>> import gmpy2
>>> from gmpy2 import mpz, mpq, mpfr, maxnum, minnum
>>> a = mpfr("12.34")
>>> b = mpfr("45.67")
>>> nan = mpfr("nan")
>>> inf = mpfr("inf")
>>> minf = mpfr("-inf")
Test maxnum
-----------
>>> maxnum(a,b)
mpfr('45.670000000000002')
>>> maxnum(b,a)
mpfr('45.670000000000002')
>>> maxnum(a,-b)
mpfr('12.34')
>>> maxnum(a, 123456)
mpfr('123456.0')
>>> maxnum(12345678901234567890, a)
mpfr('1.2345678901234567e+19')
>>> maxnum(0, -1)
mpfr('0.0')
>>> maxnum(1, inf)
mpfr('inf')
>>> maxnum(1, -inf)
mpfr('1.0')
>>> maxnum(nan, a)
mpfr('12.34')
>>> maxnum(a, nan)
mpfr('12.34')
>>> maxnum(nan, inf)
mpfr('inf')
>>> maxnum(nan, -inf)
mpfr('-inf')
>>> maxnum(nan, nan)
mpfr('nan')
Test minnum
-----------
>>> minnum(a,b)
mpfr('12.34')
>>> minnum(b,a)
mpfr('12.34')
>>> minnum(1,inf)
mpfr('1.0')
>>> minnum(minf, a)
mpfr('-inf')
>>> minnum(nan, inf)
mpfr('inf')
>>> minnum(nan, nan)
mpfr('nan')
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