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require 'test/unit'
class TestMethod < Test::Unit::TestCase
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
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)
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
end
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