Misc fixes

[skirpichev]

• re-add support for Decimal->mpq conversion, closes https://github.com/aleaxit/gmpy/issues/327
• bulk tests for int(mpz(int(n)))==int(n) invariant

[codecov-commenter]

Codecov Report

Merging #413 (32a338d) into master (3212bcb) will increase coverage by 0.00%. The diff coverage is 100.00%.

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@@           Coverage Diff           @@
##           master     #413   +/-   ##
=======================================
  Coverage   83.59%   83.59%           
=======================================
  Files          49       49           
  Lines       11707    11711    +4     
  Branches     2188     2189    +1     
=======================================
+ Hits         9786     9790    +4     
  Misses       1921     1921           

Impacted Files	Coverage Δ
src/gmpy2_convert_gmp.c	74.67% <100.00%> (+0.19%)	:arrow_up:

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[casevh]

Shouldn't res be decremented after calling GMPy_MPQ_NewInit ?

[skirpichev]

Shouldn't res be decremented after calling GMPy_MPQ_NewInit ?

Indeed. First commit was updated to address this.

[casevh]

Thanks.

Case