diff options
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | test/test_singleton.rb | 92 |
2 files changed, 95 insertions, 2 deletions
@@ -1,3 +1,8 @@ +Wed May 18 03:14:49 2011 Eric Hodel <drbrain@segment7.net> + + * test/test_singleton.rb: Add tests from lib/singleton.rb. Patch by + Pete Higgins. [Ruby 1.9 - Bug #4715] + Wed May 18 03:03:07 2011 Eric Hodel <drbrain@segment7.net> * lib/singleton.rb: Improve documentation. Patch by Pete Higgins. diff --git a/test/test_singleton.rb b/test/test_singleton.rb index bd11095cf2..259f9c5e0f 100644 --- a/test/test_singleton.rb +++ b/test/test_singleton.rb @@ -2,14 +2,102 @@ require 'test/unit' require 'singleton' class TestSingleton < Test::Unit::TestCase - class C + class SingletonTest include Singleton end def test_marshal - o1 = C.instance + o1 = SingletonTest.instance m = Marshal.dump(o1) o2 = Marshal.load(m) assert_same(o1, o2) end + + def test_instance_never_changes + a = SingletonTest.instance + b = SingletonTest.instance + assert_same a, b + end + + def test_initialize_raises_exception + assert_raises NoMethodError do + SingletonTest.new + end + end + + def test_allocate_raises_exception + assert_raises NoMethodError do + SingletonTest.allocate + end + end + + def test_clone_raises_exception + exception = assert_raises TypeError do + SingletonTest.instance.clone + end + + expected = "can't clone instance of singleton TestSingleton::SingletonTest" + + assert_equal expected, exception.message + end + + def test_dup_raises_exception + exception = assert_raises TypeError do + SingletonTest.instance.dup + end + + expected = "can't dup instance of singleton TestSingleton::SingletonTest" + + assert_equal expected, exception.message + end + + def test_include_in_module_raises_exception + mod = Module.new + + exception = assert_raises TypeError do + mod.class_eval do + include Singleton + end + end + + expected = "Inclusion of the OO-Singleton module in module #{mod}" + + assert_equal expected, exception.message + end + + def test_extending_singleton_raises_exception + assert_raises NoMethodError do + 'foo'.extend Singleton + end + end + + def test_inheritance_works_with_overridden_inherited_method + super_super_called = false + + outer = Class.new do + define_singleton_method :inherited do |sub| + super_super_called = true + end + end + + inner = Class.new(outer) do + include Singleton + end + + tester = Class.new(inner) + + assert super_super_called + + a = tester.instance + b = tester.instance + assert_same a, b + end + + def test_class_level_cloning_preserves_singleton_behavior + klass = SingletonTest.clone + + a = klass.instance + b = klass.instance + assert_same a, b + end end |