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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 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
eval(<<-End, ::TOPLEVEL_BINDING)
class Fixnum
alias orig_plus +
undef +
def +(other)
other
end
end
End
assert_equal 11, 10 + 11
ensure
eval(<<-End, ::TOPLEVEL_BINDING)
class Fixnum
undef +
alias + orig_plus
end
End
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
eval(<<-End, ::TOPLEVEL_BINDING)
class Fixnum
alias orig_minus -
undef -
def -(other)
other
end
end
End
assert_equal 3, 8 - 3
ensure
eval(<<-End, ::TOPLEVEL_BINDING)
class Fixnum
undef -
alias - orig_minus
end
End
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
end
def test_fixnum_mod
assert_equal 1, 8 % 7
end
def test_float_plus
assert_equal 4.0, 2.0 + 2.0
eval(<<-End, ::TOPLEVEL_BINDING)
class Float
alias orig_plus +
undef +
def +(other)
other
end
end
End
assert_equal 2.0, 2.0 + 2.0
eval(<<-End, ::TOPLEVEL_BINDING)
class Float
undef +
alias + orig_plus
end
End
assert_equal 4.0, 2.0 + 2.0
end
def test_string_length
assert_equal 6, "string".length
eval(<<-End, ::TOPLEVEL_BINDING)
class String
alias orig_length length
undef length
def length
99
end
end
End
assert_equal 99, "string".length
ensure
eval(<<-End, ::TOPLEVEL_BINDING)
class String
undef length
alias length orig_length
end
End
assert_equal 6, "string".length
end
def test_string_plus
assert_equal "", "" + ""
assert_equal "x", "x" + ""
assert_equal "x", "" + "x"
assert_equal "ab", "a" + "b"
eval(<<-End, ::TOPLEVEL_BINDING)
class String
alias orig_plus +
undef +
def +(other)
'OK'
end
end
End
assert_equal 'OK', "a" + "b"
ensure
eval(<<-End, ::TOPLEVEL_BINDING)
class String
undef +
alias + orig_plus
end
End
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_hash_length
assert_equal 0, {}.length
assert_equal 1, {1=>1}.length
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
end
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