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* lib/prime.rb (Prime#prime?): negative numbers can't be primes

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by definition. reported by Ivan Kataitsev. [Bug #7395]
* test/test_prime.rb: add test.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45878 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
ayumin 2014-05-08 18:22:29 +00:00
parent 16b8aadc75
commit bef8e4557c
3 changed files with 8 additions and 3 deletions
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4
test/test_prime.rb
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@ -141,8 +141,8 @@ class TestPrime < Test::Unit::TestCase
# negative
assert !-1.prime?
assert(-2.prime?)
assert(-3.prime?)
assert !-2.prime?
assert !-3.prime?
assert !-4.prime?
end
end