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require 'test/unit'
class TestRubyOptimization < Test::Unit::TestCase
BIGNUM_POS_MIN_32 = 1073741824 # 2 ** 30
if BIGNUM_POS_MIN_32.kind_of?(Fixnum)
FIXNUM_MAX = 4611686018427387903 # 2 ** 62 - 1
else
FIXNUM_MAX = 1073741823 # 2 ** 30 - 1
end
BIGNUM_NEG_MAX_32 = -1073741825 # -2 ** 30 - 1
if BIGNUM_NEG_MAX_32.kind_of?(Fixnum)
FIXNUM_MIN = -4611686018427387904 # -2 ** 62
else
FIXNUM_MIN = -1073741824 # -2 ** 30
end
def redefine_method(klass, method)
(@redefine_method_seq ||= 0)
seq = (@redefine_method_seq += 1)
eval(<<-End, ::TOPLEVEL_BINDING)
class #{klass}
alias redefine_method_orig_#{seq} #{method}
undef #{method}
def #{method}(*args)
args[0]
end
end
End
begin
return yield
ensure
eval(<<-End, ::TOPLEVEL_BINDING)
class #{klass}
undef #{method}
alias #{method} redefine_method_orig_#{seq}
end
End
end
end
def test_fixnum_plus
a, b = 1, 2
assert_equal 3, a + b
assert_instance_of Fixnum, FIXNUM_MAX
assert_instance_of Bignum, FIXNUM_MAX + 1
assert_equal 21, 10 + 11
assert_equal 11, redefine_method('Fixnum', '+') { 10 + 11 }
assert_equal 21, 10 + 11
end
def test_fixnum_minus
assert_equal 5, 8 - 3
assert_instance_of Fixnum, FIXNUM_MIN
assert_instance_of Bignum, FIXNUM_MIN - 1
assert_equal 5, 8 - 3
assert_equal 3, redefine_method('Fixnum', '-') { 8 - 3 }
assert_equal 5, 8 - 3
end
def test_fixnum_mul
assert_equal 15, 3 * 5
end
def test_fixnum_div
assert_equal 3, 15 / 5
assert_equal 6.66, redefine_method('Float', '/') { 4.2 / 6.66 }, "bug 9238"
end
def test_fixnum_mod
assert_equal 1, 8 % 7
end
def test_float_plus
assert_equal 4.0, 2.0 + 2.0
assert_equal 2.0, redefine_method('Float', '+') { 2.0 + 2.0 }
assert_equal 4.0, 2.0 + 2.0
end
def test_string_length
assert_equal 6, "string".length
assert_nil redefine_method('String', 'length') { "string".length }
assert_equal 6, "string".length
end
def test_string_empty?
assert_equal true, "".empty?
assert_equal false, "string".empty?
assert_nil redefine_method('String', 'empty?') { "string".empty? }
assert_equal true, "".empty?
assert_equal false, "string".empty?
end
def test_string_plus
assert_equal "", "" + ""
assert_equal "x", "x" + ""
assert_equal "x", "" + "x"
assert_equal "ab", "a" + "b"
assert_equal 'b', redefine_method('String', '+') { "a" + "b" }
assert_equal "ab", "a" + "b"
end
def test_string_succ
assert_equal 'b', 'a'.succ
assert_equal 'B', 'A'.succ
end
def test_string_format
assert_equal '2', '%d' % 2
end
def test_array_plus
assert_equal [1,2], [1]+[2]
end
def test_array_minus
assert_equal [2], [1,2] - [1]
end
def test_array_length
assert_equal 0, [].length
assert_equal 3, [1,2,3].length
end
def test_array_empty?
assert_equal true, [].empty?
assert_equal false, [1,2,3].empty?
end
def test_hash_length
assert_equal 0, {}.length
assert_equal 1, {1=>1}.length
end
def test_hash_empty?
assert_equal true, {}.empty?
assert_equal false, {1=>1}.empty?
end
class MyObj
def ==(other)
true
end
end
def test_eq
assert_equal true, nil == nil
assert_equal true, 1 == 1
assert_equal true, 'string' == 'string'
assert_equal true, 1 == MyObj.new
assert_equal false, nil == MyObj.new
assert_equal true, MyObj.new == 1
assert_equal true, MyObj.new == nil
end
def test_tailcall
bug4082 = '[ruby-core:33289]'
option = {
tailcall_optimization: true,
trace_instruction: false,
}
iseq = RubyVM::InstructionSequence.new(<<-EOF, "Bug#4082", bug4082, nil, option).eval
class #{self.class}::Tailcall
def fact_helper(n, res)
if n == 1
res
else
fact_helper(n - 1, n * res)
end
end
def fact(n)
fact_helper(n, 1)
end
end
EOF
assert_equal(9131, Tailcall.new.fact(3000).to_s.size, bug4082)
end
def test_tailcall_with_block
bug6901 = '[ruby-dev:46065]'
option = {
tailcall_optimization: true,
trace_instruction: false,
}
iseq = RubyVM::InstructionSequence.new(<<-EOF, "Bug#6901", bug6901, nil, option).eval
def identity(val)
val
end
def delay
-> {
identity(yield)
}
end
EOF
assert_equal(123, delay { 123 }.call, bug6901)
end
end
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