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* lib/cmath.rb (CMath.sqrt): use floating-point value. [ruby-core:31672] [Bug #3678]

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* test/test_cmath.rb: added for testing lib/cmath.rb.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28964 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
mrkn 2010-08-11 14:30:47 +00:00
parent c89bdea7c9
commit 9b0b9ac237
3 changed files with 16 additions and 1 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
Wed Aug 11 23:28:22 2010 Kenta Murata <mrkn@mrkn.jp>
* lib/cmath.rb (CMath.sqrt): use floating-point value.
[ruby-core:31672] [Bug #3678]
* test/test_cmath.rb: added for testing lib/cmath.rb.
Wed Aug 11 20:57:25 2010 Kazuhiro NISHIYAMA <zn@mbf.nifty.com> Wed Aug 11 20:57:25 2010 Kazuhiro NISHIYAMA <zn@mbf.nifty.com>
* NEWS: merge from branches/ruby_1_9_2, and move io/console. * NEWS: merge from branches/ruby_1_9_2, and move io/console.

2
lib/cmath.rb
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@ -79,7 +79,7 @@ module CMath
else else
r = z.abs r = z.abs
x = z.real x = z.real
Complex(sqrt!((r + x) / 2), sqrt!((r - x) / 2)) Complex(sqrt!((r + x) / 2.0), sqrt!((r - x) / 2.0))
end end
end end
end end

8
test/test_cmath.rb Normal file
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@ -0,0 +1,8 @@
require 'test/unit'
require 'cmath'
class TestCMath < Test::Unit::TestCase
def test_sqrt
assert_equal CMath.sqrt(1.0.i), CMath.sqrt(1.i), '[ruby-core:31672]'
end
end