/
testCornerCases.rb
257 lines (190 loc) · 7.57 KB
/
testCornerCases.rb
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require 'test/unit'
class TestClassCornerCases < Test::Unit::TestCase
def setup
super
@cls = Class
@mod = Module
end
class AllocatedClassSubclass < Class.allocate;end
class NewClassSubclass < Class.new;end
def test_class_allocate
assert_nothing_raised{@cls.allocate}
# uninitialized class
assert_raise(TypeError){@cls.allocate.superclass}
# can't instantiate uninitialized class
assert_raise(TypeError){@cls.allocate.new}
# allocator undefined for AllocatedClassSubclass
assert_raise(TypeError){AllocatedClassSubclass.new}
assert_raise(TypeError){AllocatedClassSubclass.allocate}
assert_nothing_raised{@cls.allocate.dup}
assert_nothing_raised{@cls.allocate.clone}
end
def test_class_initialize
@allocated = Class.allocate
assert_nothing_raised{@allocated.send(:initialize, String)}
assert_equal(@allocated.superclass, String)
# already initialized class
assert_raise(TypeError){@allocated.send(:initialize, String)}
end
def test_class_initialize_copy
@allocated = Class.allocate
assert_nothing_raised{@allocated.send(:initialize_copy, String)}
assert_equal(@allocated.superclass, Object)
@allocated = Class.allocate
# initialize_copy should take same class object
assert_raise(TypeError){@allocated.send(:initialize_copy,"")}
end
def test_class_new
assert_nothing_raised{@cls.new.allocate}
assert_nothing_raised{@cls.new(@cls)}
assert_nothing_raised{@cls.new(@mod).new}
# wrong instance allocation
assert_raise(TypeError){@cls.new(@cls).new}
assert_raise(TypeError){@cls.new(@cls).allocate}
# superclass must be a class
assert_raise(TypeError){@cls.new("")}
# wrong intance allocation
assert_raise(TypeError){@cls.dup.new("")}
assert_raise(TypeError){@cls.clone.new("")}
# allocator undefined for #<Class:0x...>
assert_raise(TypeError){@cls.new(@cls.allocate.dup).new}
assert_raise(TypeError){@cls.new(@cls.allocate.clone).new}
assert_nothing_raised{NewClassSubclass.new}
assert_nothing_raised{NewClassSubclass.allocate}
end
def test_singleton_class
o = Object.new
s = class<<Object;self;end
# can't create instance of virtual class
assert_raise(TypeError){s.allocate}
assert_raise(TypeError){s.new}
assert_raise(TypeError){eval "class Class < class<<Object;self;end;end"}
# can't copy singleton class
assert_raise(TypeError){s.dup}
assert_raise(TypeError){s.clone}
# already initialized class (TypeError)
assert_raise(TypeError){s.send(:initialize)}
assert_raise(TypeError){s.send(:initialize_copy,"")}
# can't make subclass of virtual class
assert_raise(TypeError){@cls.new(s)}
end
end
class TestConstantCornerCases < Test::Unit::TestCase
def test_parent_not_changed_on_constant_assignemnt
assert_equal("M::A", eval( <<-EOF
$a=Class.new
module M
A=$a
end
module N
B=$a
end
return N::B.to_s
EOF
))
end
def teardown
$a = nil
end
end
class TestInheritanceAndReopeningCornerCases < Test::Unit::TestCase
module AModule;end
class AClass;end
def test_class_module_reopen
assert_nothing_raised{eval "module AModule;end"}
assert_nothing_raised{eval "class AClass;end"}
# AModule is not a class
assert_raise(TypeError){eval "class AModule;end"}
# AClass is not a module
assert_raise(TypeError){eval "module AClass;end"}
# superclass mismatch for class AClass
assert_raise(TypeError){eval "class AClass<String;end"}
# superclass must be a Class (Fixnum given)
assert_raise(TypeError){eval "class AClass<1;end"}
end
def test_weird_things_allowed_by_parser
# can't make subclass of virtual class
assert_raise(TypeError){eval "class AClass<class<<self;self;end;end"}
assert_nothing_raised{"class C < Class.new(Class.allocate.dup);end"}
# allocator undefined for C
assert_nothing_raised{"class C < Class.new(Class.allocate.dup);end;C.new"}
end
end
class TestMarshalCornerCases < Test::Unit::TestCase
class AClass;end
OldClass = AClass
class AModule;end
AnInstance = AClass.new
ASingleton = class<<AnInstance;self;end
def setup
end
def marshal_dump(*obj)
Marshal.dump obj
end
def marshal_load(*str)
Marshal.load *str
end
def marshal_dump_and_load(*obj)
Marshal.load(Marshal.dump(obj))
end
def test_marshal_singleton
# can't dump anonymous class #<Class:0x28404fc>
assert_raise(TypeError){marshal_dump Class.new}
assert_raise(TypeError){marshal_dump Class.allocate}
# can't dump anonymous module #<Module:01xcd2e33>
assert_raise(TypeError){marshal_dump Module.allocate}
assert_nothing_raised{marshal_dump Object.new}
assert_nothing_raised{marshal_dump Object.allocate}
assert_nothing_raised{marshal_dump AClass}
# a class that that has a singleton without ivars can be dumped
assert_nothing_raised{marshal_dump AnInstance}
# singleton class can't be dumped
assert_raise(TypeError){marshal_dump ASingleton}
ASingleton.instance_eval{@foo=:blah}
# singleton can't be dumped
assert_raise(TypeError){marshal_dump AnInstance}
end
class AnotherClass;end
module AnotherModule;end
module AnotherModule2;end
$set_class = lambda{|c|AnotherClass=c}
$set_module = lambda{|c|AnotherModule=c}
$set_module2 = lambda{|c|AnotherModule2=c}
def test_incomplete_type_system_unmarshal_sanity
stream = marshal_dump(AnotherClass.new)
#p AnotherClass
$set_class[nil]
# TestMarshalCornerCases::AnotherClass does not refer class/module
assert_raise(TypeError){marshal_load(stream)}
$set_class[Kernel]
# TestMarshalCornerCases::AnotherClass does not refer class
assert_raise(ArgumentError){marshal_load(stream)}
#$set_class[String]
# # dump format error
#assert_raise(ArgumentError){marshal_load(stream)}
stream = marshal_dump(AnotherModule)
$set_module[nil]
# TestMarshalCornerCases::AnotherClass does not refer class/module
assert_raise(TypeError){marshal_load(stream)}
stream = marshal_dump(AnotherModule2)
$set_module2[String]
# TestMarshalCornerCases::AnotherModule2 does not refer module
assert_raise(ArgumentError){marshal_load(stream)}
end
def teardown
$set_class = $set_module = $set_module2 = nil
end
end
class TestBuiltinClassesOverwrittenCornerCases < Test::Unit::TestCase
def test_core_constants_removed_sanity
# we will have to fire a separate runtime here for this
# the runtime should either use Constants cached in runtime or use Ruby.getClassFromPath
# and raise TypeErrors if appropriate
# Object.constants.each{|c|Object.const_set(c, nil) unless ["Object", "Module", "Class"].include? c}
end
end
class TestUninitializedInstanceSanity < Test::Unit::TestCase
def test_uninitialized_core_classe
# core class instance sanity after calling plain #allocate without initialization
end
end