From f5c9a004acc4f939a0dcff621864d895378d82cc Mon Sep 17 00:00:00 2001 From: yugui Date: Wed, 15 Jul 2009 11:58:10 +0000 Subject: 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 --- test/test_prime.rb | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'test') 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? -- cgit