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| author | yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2009-07-15 11:58:10 +0000 |
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| committer | yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2009-07-15 11:58:10 +0000 |
| commit | f5c9a004acc4f939a0dcff621864d895378d82cc (patch) | |
| tree | ebab2e950b69f470b5b8725eaf62e8cf01a38350 /test/test_prime.rb | |
| parent | 5c6d11007b4a2b4333d8b836e64962e5d3a9a7a0 (diff) | |
| download | ruby-f5c9a004acc4f939a0dcff621864d895378d82cc.tar.gz ruby-f5c9a004acc4f939a0dcff621864d895378d82cc.tar.xz ruby-f5c9a004acc4f939a0dcff621864d895378d82cc.zip | |
merges r24091 from trunk into ruby_1_9_1.
--
* lib/prime.rb (Prime#prime_division): now decomposes
negative integer into a decomposition with element [-1, 1].
* test/test_prime.rb: test for it.
git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_9_1@24121 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'test/test_prime.rb')
| -rw-r--r-- | test/test_prime.rb | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/test/test_prime.rb b/test/test_prime.rb index 0dad7cf98..d7c3bf572 100644 --- a/test/test_prime.rb +++ b/test/test_prime.rb @@ -98,10 +98,15 @@ class TestPrime < Test::Unit::TestCase def test_prime_division pd = PRIMES.inject(&:*).prime_division assert_equal PRIMES.map{|p| [p, 1]}, pd + + pd = (-PRIMES.inject(&:*)).prime_division + assert_equal [-1, *PRIMES].map{|p| [p, 1]}, pd end def test_from_prime_division assert_equal PRIMES.inject(&:*), Integer.from_prime_division(PRIMES.map{|p| [p,1]}) + + assert_equal -PRIMES.inject(&:*), Integer.from_prime_division([[-1, 1]] + PRIMES.map{|p| [p,1]}) end def test_prime? |