From 36a0c276d2fce22aa53427b1d7519cb476801f63 Mon Sep 17 00:00:00 2001 From: yugui Date: Tue, 3 Mar 2009 15:57:15 +0000 Subject: * lib/prime.rb (Prime::prime?): used to return a wrong answer. [ruby-core:22646]. * test/test_prime.rb (test_prime?): test case for [ruby-core:22646]. git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@22741 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- test/test_prime.rb | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'test/test_prime.rb') diff --git a/test/test_prime.rb b/test/test_prime.rb index aca510968..0dad7cf98 100644 --- a/test/test_prime.rb +++ b/test/test_prime.rb @@ -89,6 +89,11 @@ class TestPrime < Test::Unit::TestCase end end + def test_default_instance_does_not_have_compatibility_methods + assert !Prime.instance.respond_to?(:succ) + assert !Prime.instance.respond_to?(:next) + end + class TestInteger < Test::Unit::TestCase def test_prime_division pd = PRIMES.inject(&:*).prime_division @@ -100,6 +105,10 @@ class TestPrime < Test::Unit::TestCase end def test_prime? + # zero and unit + assert !0.prime? + assert !1.prime? + # small primes assert 2.prime? assert 3.prime? @@ -121,6 +130,12 @@ class TestPrime < Test::Unit::TestCase # factorial assert !(2...100).inject(&:*).prime? + + # negative + assert !-1.prime? + assert -2.prime? + assert -3.prime? + assert !-4.prime? end end end -- cgit