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| author | yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2009-07-15 11:58:10 +0000 |
|---|---|---|
| committer | yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2009-07-15 11:58:10 +0000 |
| commit | 52cc8ef40d74007e010f36707b45e51cfbd14f0b (patch) | |
| tree | ebab2e950b69f470b5b8725eaf62e8cf01a38350 /test | |
| parent | 68e6b4ccbd668ff79a134c870d6481e8e3152313 (diff) | |
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: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@24121 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'test')
| -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 0dad7cf987..d7c3bf5720 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? |