require 'test/unit' require_relative 'envutil' class TestClass < Test::Unit::TestCase # ------------------ # Various test classes # ------------------ class ClassOne attr :num_args @@subs = [] def initialize(*args) @num_args = args.size @args = args end def [](n) @args[n] end def ClassOne.inherited(klass) @@subs.push klass end def subs @@subs end end class ClassTwo < ClassOne end class ClassThree < ClassOne end class ClassFour < ClassThree end # ------------------ # Start of tests # ------------------ def test_s_inherited assert_equal([ClassTwo, ClassThree, ClassFour], ClassOne.new.subs) end def test_s_new c = Class.new assert_same(Class, c.class) assert_same(Object, c.superclass) c = Class.new(Fixnum) assert_same(Class, c.class) assert_same(Fixnum, c.superclass) end def test_00_new_basic a = ClassOne.new assert_equal(ClassOne, a.class) assert_equal(0, a.num_args) a = ClassOne.new(1, 2, 3) assert_equal(3, a.num_args) assert_equal(1, a[0]) end def test_01_new_inherited a = ClassTwo.new assert_equal(ClassTwo, a.class) assert_equal(0, a.num_args) a = ClassTwo.new(1, 2, 3) assert_equal(3, a.num_args) assert_equal(1, a[0]) end def test_superclass assert_equal(ClassOne, ClassTwo.superclass) assert_equal(Object, ClassTwo.superclass.superclass) assert_equal(BasicObject, ClassTwo.superclass.superclass.superclass) end def test_class_cmp assert_raise(TypeError) { Class.new <= 1 } assert_raise(TypeError) { Class.new >= 1 } assert_nil(Class.new <=> 1) end def test_class_initialize assert_raise(TypeError) do Class.new.instance_eval { initialize } end end def test_instanciate_singleton_class c = class << Object.new; self; end assert_raise(TypeError) { c.new } end def test_superclass_of_basicobject assert_equal(nil, BasicObject.superclass) end def test_module_function c = Class.new assert_raise(TypeError) do Module.instance_method(:module_function).bind(c).call(:foo) end end def test_method_redefinition feature2155 = '[ruby-dev:39400]' line = __LINE__+4 stderr = EnvUtil.verbose_warning do Class.new do def foo; end def foo; end end end assert_match(/:#{line}: warning: method redefined; discarding old foo/, stderr) assert_match(/:#{line-1}: warning: previous definition of foo/, stderr, feature2155) assert_warning '' do Class.new do def foo; end alias bar foo def foo; end end end assert_warning '' do Class.new do def foo; end alias bar foo alias bar foo end end line = __LINE__+4 stderr = EnvUtil.verbose_warning do Class.new do define_method(:foo) do end def foo; end end end assert_match(/:#{line}: warning: method redefined; discarding old foo/, stderr) assert_match(/:#{line-1}: warning: previous definition of foo/, stderr, feature2155) assert_warning '' do Class.new do define_method(:foo) do end alias bar foo alias bar foo end end assert_warning '' do Class.new do def foo; end undef foo end end end def test_check_inheritable assert_raise(TypeError) { Class.new(Object.new) } o = Object.new c = class << o; self; end assert_raise(TypeError) { Class.new(c) } assert_raise(TypeError) { Class.new(Class) } assert_raise(TypeError) { eval("class Foo < Class; end") } end def test_initialize_copy c = Class.new assert_raise(TypeError) { c.instance_eval { initialize_copy(1) } } o = Object.new c = class << o; self; end assert_raise(TypeError) { c.dup } assert_raise(TypeError) { BasicObject.dup } end def test_singleton_class assert_raise(TypeError) { 1.extend(Module.new) } assert_raise(TypeError) { 1.0.extend(Module.new) } assert_raise(TypeError) { (2.0**1000).extend(Module.new) } assert_raise(TypeError) { :foo.extend(Module.new) } assert_in_out_err([], <<-INPUT, %w(:foo :foo true true), []) module Foo; def foo; :foo; end; end false.extend(Foo) true.extend(Foo) p false.foo p true.foo p FalseClass.include?(Foo) p TrueClass.include?(Foo) INPUT end def test_uninitialized assert_raise(TypeError) { Class.allocate.new } assert_raise(TypeError) { Class.allocate.superclass } bug6863 = '[ruby-core:47148]' assert_raise(TypeError, bug6863) { Class.new(Class.allocate) } end def test_nonascii_name c = eval("class ::C\u{df}; self; end") assert_equal("C\u{df}", c.name, '[ruby-core:24600]') c = eval("class C\u{df}; self; end") assert_equal("TestClass::C\u{df}", c.name, '[ruby-core:24600]') end def test_invalid_jump_from_class_definition assert_raise(SyntaxError) { eval("class C; next; end") } assert_raise(SyntaxError) { eval("class C; break; end") } assert_raise(SyntaxError) { eval("class C; redo; end") } assert_raise(SyntaxError) { eval("class C; retry; end") } assert_raise(SyntaxError) { eval("class C; return; end") } assert_raise(SyntaxError) { eval("class C; yield; end") } end def test_clone original = Class.new { def foo return super() end } mod = Module.new { def foo return "mod#foo" end } copy = original.clone copy.send(:include, mod) assert_equal("mod#foo", copy.new.foo) end def test_nested_class_removal assert_normal_exit('File.__send__(:remove_const, :Stat); at_exit{File.stat(".")}; GC.start') end class PrivateClass end private_constant :PrivateClass def test_redefine_private_class assert_raise(NameError) do eval("class ::TestClass::PrivateClass; end") end eval <<-END class ::TestClass class PrivateClass def foo; 42; end end end END assert_equal(42, PrivateClass.new.foo) end StrClone = String.clone Class.new(StrClone) def test_cloned_class bug5274 = StrClone.new("[ruby-dev:44460]") assert_equal(bug5274, Marshal.load(Marshal.dump(bug5274))) end def test_cannot_reinitialize_class_with_initialize_copy # [ruby-core:50869] assert_in_out_err([], <<-'end;', ["Object"], []) class Class def initialize_copy(*); super; end end class A; end class B; end A.send(:initialize_copy, Class.new(B)) rescue nil p A.superclass end; end module M C = 1 def self.m C end end def test_constant_access_from_method_in_cloned_module # [ruby-core:47834] m = M.dup assert_equal 1, m::C assert_equal 1, m.m end def test_invalid_superclass assert_raise(TypeError) do eval <<-'end;' class C < nil end end; end assert_raise(TypeError) do eval <<-'end;' class C < false end end; end assert_raise(TypeError) do eval <<-'end;' class C < true end end; end assert_raise(TypeError) do eval <<-'end;' class C < 0 end end; end assert_raise(TypeError) do eval <<-'end;' class C < "" end end; end end def test_cloned_singleton_method_added bug5283 = '[ruby-dev:44477]' added = [] c = Class.new c.singleton_class.class_eval do define_method(:singleton_method_added) {|mid| added << [self, mid]} def foo; :foo; end end added.clear d = c.clone assert_empty(added.grep(->(k) {c == k[0]}), bug5283) assert_equal(:foo, d.foo) end end