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Bring BigMath::log behaviour closer to MRI #4170

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@shirshendu shirshendu commented Sep 22, 2016

Especially for a Rational, high precision use-case

Fixes #4158

Especially for a Rational, high precision use-case

Fixes #4158
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@shirshendu shirshendu commented Sep 22, 2016

Just for convenience, the command for running the newly added test case:
bin/jruby test/mri/bigdecimal/test_bigdecimal.rb -n test_BigMath_log_with_rational_high_precision_case

r = Rational(1_234_567_890, 987_654_321)
assert_in_delta(result, BigMath.log(r, 50), 0.0000000000_0000000000_0000000000_0000000000_0000000001)
end

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headius Sep 22, 2016
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We don't usually edit the MRI tests since there's no good process for upstreaming those changes. I'll move this to spec/ruby.

headius added a commit that referenced this pull request Sep 22, 2016
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@headius headius commented Sep 22, 2016

Merged your fix in 68552a3 and the spec/ruby change in 84a5f78. Thanks!

@headius headius closed this Sep 22, 2016
@headius headius added this to the JRuby 9.1.6.0 milestone Sep 22, 2016
eregon added a commit to ruby/spec that referenced this pull request Sep 27, 2016
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