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| author | yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2009-07-13 13:51:49 +0000 |
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| committer | yugui <yugui@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2009-07-13 13:51:49 +0000 |
| commit | 60558c8cfb878dd1844f3f4a0e78f3fe049f1652 (patch) | |
| tree | f22c154e749662d907df5b6fdb98e3208b8528e0 /test | |
| parent | aca5106342b1dfbe02e603e5b89a35f317a67289 (diff) | |
| download | ruby-60558c8cfb878dd1844f3f4a0e78f3fe049f1652.tar.gz ruby-60558c8cfb878dd1844f3f4a0e78f3fe049f1652.tar.xz ruby-60558c8cfb878dd1844f3f4a0e78f3fe049f1652.zip | |
* 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/trunk@24091 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 e7c025a55..307d53afb 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? |