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require 'test/unit'
class TestMethod < Test::Unit::TestCase
def setup
@verbose = $VERBOSE
$VERBOSE = nil
end
def teardown
$VERBOSE = @verbose
end
def m0() end
def m1(a) end
def m2(a, b) end
def mo1(a = nil, &b) end
def mo2(a, b = nil) end
def mo3(*a) end
def mo4(a, *b, &c) end
def mo5(a, *b, c) end
def mo6(a, *b, c, &d) end
class Base
def foo() :base end
end
class Derived < Base
def foo() :derived end
end
def test_arity
assert_equal(0, method(:m0).arity)
assert_equal(1, method(:m1).arity)
assert_equal(2, method(:m2).arity)
assert_equal(-1, method(:mo1).arity)
assert_equal(-2, method(:mo2).arity)
assert_equal(-1, method(:mo3).arity)
assert_equal(-2, method(:mo4).arity)
assert_equal(-3, method(:mo5).arity)
assert_equal(-3, method(:mo6).arity)
end
def test_unbind
assert_equal(:derived, Derived.new.foo)
um = Derived.new.method(:foo).unbind
assert_instance_of(UnboundMethod, um)
Derived.class_eval do
def foo() :changed end
end
assert_equal(:changed, Derived.new.foo)
assert_equal(:derived, um.bind(Derived.new).call)
assert_raise(TypeError) do
um.bind(Base.new)
end
end
def test_callee
assert_equal(:test_callee, __method__)
assert_equal(:m, Class.new {def m; __method__; end}.new.m)
assert_equal(:m, Class.new {def m; tap{return __method__}; end}.new.m)
assert_equal(:m, Class.new {define_method(:m) {__method__}}.new.m)
assert_equal(:m, Class.new {define_method(:m) {tap{return __method__}}}.new.m)
assert_nil(eval("class TestCallee; __method__; end"))
end
def test_body
o = Object.new
def o.foo; end
assert_nothing_raised { VM::InstructionSequence.disasm(o.method(:foo)) }
end
def test_new
c1 = Class.new
c1.class_eval { def foo; :foo; end }
c2 = Class.new(c1)
c2.class_eval { private :foo }
o = c2.new
o.extend(Module.new)
assert_raise(NameError) { o.method(:bar) }
assert_raise(NameError) { o.public_method(:foo) }
assert_equal(:foo, o.method(:foo).call)
end
def test_eq
o = Object.new
class << o
def foo; end
alias bar foo
def baz; end
end
assert_not_equal(o.method(:foo), nil)
m = o.method(:foo)
def m.foo; end
assert_not_equal(o.method(:foo), m)
assert_equal(o.method(:foo), o.method(:foo))
assert_equal(o.method(:foo), o.method(:bar))
assert_not_equal(o.method(:foo), o.method(:baz))
end
def test_hash
o = Object.new
def o.foo; end
assert_kind_of(Integer, o.method(:foo).hash)
end
def test_receiver_name_owner
o = Object.new
def o.foo; end
m = o.method(:foo)
assert_equal(o, m.receiver)
assert_equal(:foo, m.name)
assert_equal(class << o; self; end, m.owner)
assert_equal("foo", m.unbind.name)
assert_equal(class << o; self; end, m.unbind.owner)
end
def test_instance_method
c = Class.new
c.class_eval do
def foo; :foo; end
private :foo
end
o = c.new
o.method(:foo).unbind
assert_raise(NoMethodError) { o.foo }
c.instance_method(:foo).bind(o)
assert_equal(:foo, o.instance_eval { foo })
assert_raise(NameError) { c.public_instance_method(:foo) }
def o.bar; end
m = o.method(:bar).unbind
assert_raise(TypeError) { m.bind(Object.new) }
end
def test_define_method
c = Class.new
c.class_eval { def foo; :foo; end }
o = c.new
def o.bar; :bar; end
assert_raise(TypeError) do
c.class_eval { define_method(:foo, :foo) }
end
assert_raise(ArgumentError) do
c.class_eval { define_method }
end
c2 = Class.new(c)
c2.class_eval { define_method(:baz, o.method(:foo)) }
assert_equal(:foo, c2.new.baz)
assert_raise(TypeError) do
Class.new.class_eval { define_method(:foo, o.method(:foo)) }
end
assert_raise(TypeError) do
Class.new.class_eval { define_method(:bar, o.method(:bar)) }
end
o = Object.new
def o.foo(c)
c.class_eval { define_method(:foo) }
end
c = Class.new
o.foo(c) { :foo }
assert_equal(:foo, c.new.foo)
o = Object.new
o.instance_eval { define_singleton_method(:foo) { :foo } }
assert_equal(:foo, o.foo)
end
def test_clone
o = Object.new
def o.foo; :foo; end
m = o.method(:foo)
def m.bar; :bar; end
assert_equal(:foo, m.clone.call)
assert_equal(:bar, m.clone.bar)
end
def test_call
o = Object.new
def o.foo; p 1; end
def o.bar(x); x; end
m = o.method(:foo)
m.taint
assert_raise(SecurityError) { m.call }
end
def test_inspect
o = Object.new
def o.foo; end
m = o.method(:foo)
assert_equal("#<Method: #{ o.inspect }.foo>", m.inspect)
m = o.method(:foo)
assert_equal("#<UnboundMethod: #{ class << o; self; end.inspect }#foo>", m.unbind.inspect)
c = Class.new
c.class_eval { def foo; end; }
m = c.new.method(:foo)
assert_equal("#<Method: #{ c.inspect }#foo>", m.inspect)
m = c.instance_method(:foo)
assert_equal("#<UnboundMethod: #{ c.inspect }#foo>", m.inspect)
c2 = Class.new(c)
c2.class_eval { private :foo }
m2 = c2.new.method(:foo)
assert_equal("#<Method: #{ c2.inspect }(#{ c.inspect })#foo>", m2.inspect)
end
end
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