mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
9466848db3
[ruby-dev:28589] * numeric.c (flo_divmod): the first element of Float#divmod should be an integer. [ruby-dev:28589] * test/ruby/test_float.rb: add tests for divmod, div, modulo and remainder. * util.c (ruby_strtod): fixed wrong conversion. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@10123 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
118 lines
3.1 KiB
Ruby
118 lines
3.1 KiB
Ruby
require 'test/unit'
|
|
|
|
class TestFloat < Test::Unit::TestCase
|
|
def test_float
|
|
assert_equal(2, 2.6.floor)
|
|
assert_equal(-3, (-2.6).floor)
|
|
assert_equal(3, 2.6.ceil)
|
|
assert_equal(-2, (-2.6).ceil)
|
|
assert_equal(2, 2.6.truncate)
|
|
assert_equal(-2, (-2.6).truncate)
|
|
assert_equal(3, 2.6.round)
|
|
assert_equal(-2, (-2.4).truncate)
|
|
assert((13.4 % 1 - 0.4).abs < 0.0001)
|
|
end
|
|
|
|
def nan_test(x,y)
|
|
extend Test::Unit::Assertions
|
|
assert(x != y)
|
|
assert_equal(false, (x < y))
|
|
assert_equal(false, (x > y))
|
|
assert_equal(false, (x <= y))
|
|
assert_equal(false, (x >= y))
|
|
end
|
|
def test_nan
|
|
nan = 0.0/0
|
|
nan_test(nan, nan)
|
|
nan_test(nan, 0)
|
|
nan_test(nan, 1)
|
|
nan_test(nan, -1)
|
|
nan_test(nan, 1000)
|
|
nan_test(nan, -1000)
|
|
nan_test(nan, 1_000_000_000_000)
|
|
nan_test(nan, -1_000_000_000_000)
|
|
nan_test(nan, 100.0);
|
|
nan_test(nan, -100.0);
|
|
nan_test(nan, 0.001);
|
|
nan_test(nan, -0.001);
|
|
nan_test(nan, 1.0/0);
|
|
nan_test(nan, -1.0/0);
|
|
end
|
|
|
|
def test_precision
|
|
u = 3.7517675036461267e+17
|
|
v = sprintf("%.16e", u).to_f
|
|
assert_in_delta(u, v, u.abs * Float::EPSILON)
|
|
assert_in_delta(u, v, v.abs * Float::EPSILON)
|
|
end
|
|
|
|
def test_symmetry_bignum # [ruby-bugs-ja:118]
|
|
a = 100000000000000000000000
|
|
b = 100000000000000000000000.0
|
|
assert_equal(a == b, b == a)
|
|
end
|
|
|
|
def test_strtod
|
|
a = Float("0")
|
|
assert(a.abs < Float::EPSILON)
|
|
a = Float("0.0")
|
|
assert(a.abs < Float::EPSILON)
|
|
a = Float("+0.0")
|
|
assert(a.abs < Float::EPSILON)
|
|
a = Float("-0.0")
|
|
assert(a.abs < Float::EPSILON)
|
|
a = Float("0.0000000000000000001")
|
|
assert(a != 0.0)
|
|
a = Float("+0.0000000000000000001")
|
|
assert(a != 0.0)
|
|
a = Float("-0.0000000000000000001")
|
|
assert(a != 0.0)
|
|
a = Float(".0")
|
|
assert(a.abs < Float::EPSILON)
|
|
a = Float("+.0")
|
|
assert(a.abs < Float::EPSILON)
|
|
a = Float("-.0")
|
|
assert(a.abs < Float::EPSILON)
|
|
a = Float("0.")
|
|
assert(a.abs < Float::EPSILON)
|
|
a = Float("+0.")
|
|
assert(a.abs < Float::EPSILON)
|
|
a = Float("-0.")
|
|
assert(a.abs < Float::EPSILON)
|
|
assert_raise(ArgumentError){Float(".")}
|
|
assert_raise(ArgumentError){Float("+")}
|
|
assert_raise(ArgumentError){Float("+.")}
|
|
assert_raise(ArgumentError){Float("-")}
|
|
assert_raise(ArgumentError){Float("-.")}
|
|
assert_raise(ArgumentError){Float("1e")}
|
|
# add expected behaviour here.
|
|
end
|
|
|
|
def test_divmod
|
|
assert_equal([2, 3.5], 11.5.divmod(4))
|
|
assert_equal([-3, -0.5], 11.5.divmod(-4))
|
|
assert_equal([-3, 0.5], (-11.5).divmod(4))
|
|
assert_equal([2, -3.5], (-11.5).divmod(-4))
|
|
end
|
|
|
|
def test_div
|
|
assert_equal(2, 11.5.div(4))
|
|
assert_equal(-3, 11.5.div(-4))
|
|
assert_equal(-3, (-11.5).div(4))
|
|
assert_equal(2, (-11.5).div(-4))
|
|
end
|
|
|
|
def test_modulo
|
|
assert_equal(3.5, 11.5.modulo(4))
|
|
assert_equal(-0.5, 11.5.modulo(-4))
|
|
assert_equal(0.5, (-11.5).modulo(4))
|
|
assert_equal(-3.5, (-11.5).modulo(-4))
|
|
end
|
|
|
|
def test_remainder
|
|
assert_equal(3.5, 11.5.remainder(4))
|
|
assert_equal(3.5, 11.5.remainder(-4))
|
|
assert_equal(-3.5, (-11.5).remainder(4))
|
|
assert_equal(-3.5, (-11.5).remainder(-4))
|
|
end
|
|
end
|