require 'test/unit' class TestCall < Test::Unit::TestCase def aaa(a, b=100, *rest) res = [a, b] res += rest if rest return res end def test_call assert_raise(ArgumentError) {aaa()} assert_raise(ArgumentError) {aaa} assert_equal([1, 100], aaa(1)) assert_equal([1, 2], aaa(1, 2)) assert_equal([1, 2, 3, 4], aaa(1, 2, 3, 4)) assert_equal([1, 2, 3, 4], aaa(1, *[2, 3, 4])) end def test_callinfo bug9622 = '[ruby-core:61422] [Bug #9622]' o = Class.new do def foo(*args) bar(:foo, *args) end def bar(name) name end end.new e = assert_raise(ArgumentError) {o.foo(100)} assert_nothing_raised(ArgumentError) {o.foo} assert_raise_with_message(ArgumentError, e.message, bug9622) {o.foo(100)} end def test_safe_call s = Struct.new(:x, :y, :z) o = s.new("x") assert_equal("X", o.x&.upcase) assert_nil(o.y&.upcase) assert_equal("x", o.x) o&.x = 6 assert_equal(6, o.x) o&.x *= 7 assert_equal(42, o.x) o&.y = 5 assert_equal(5, o.y) o&.z ||= 6 assert_equal(6, o.z) o = nil assert_nil(o&.x) assert_nothing_raised(NoMethodError) {o&.x = 6} assert_nothing_raised(NoMethodError) {o&.x *= 7} end def test_safe_call_evaluate_arguments_only_method_call_is_made count = 0 proc = proc { count += 1; 1 } s = Struct.new(:x, :y) o = s.new(["a", "b", "c"]) o.y&.at(proc.call) assert_equal(0, count) o.x&.at(proc.call) assert_equal(1, count) end end