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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)
assert_equal(36893488147419111424,
36893488147419107329.0.to_i)
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)
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")}
assert_raise(ArgumentError){Float("1__1")}
# add expected behaviour here.
assert_equal(10, Float("1_0"))
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
def test_to_s
inf = 1.0 / 0.0
assert_equal("Infinity", inf.to_s)
assert_equal("-Infinity", (-inf).to_s)
assert_equal("NaN", (inf / inf).to_s)
assert_equal("1.0e+14", 10000_00000_00000.0.to_s)
end
def test_coerce
assert_equal(Float, 1.0.coerce(1).first.class)
end
def test_plus
assert_equal(4.0, 2.0.send(:+, 2))
assert_equal(4.0, 2.0.send(:+, (2**32).coerce(2).first))
assert_equal(4.0, 2.0.send(:+, 2.0))
assert_raise(TypeError) { 2.0.send(:+, nil) }
end
def test_minus
assert_equal(0.0, 2.0.send(:-, 2))
assert_equal(0.0, 2.0.send(:-, (2**32).coerce(2).first))
assert_equal(0.0, 2.0.send(:-, 2.0))
assert_raise(TypeError) { 2.0.send(:-, nil) }
end
def test_mul
assert_equal(4.0, 2.0.send(:*, 2))
assert_equal(4.0, 2.0.send(:*, (2**32).coerce(2).first))
assert_equal(4.0, 2.0.send(:*, 2.0))
assert_raise(TypeError) { 2.0.send(:*, nil) }
end
def test_div2
assert_equal(1.0, 2.0.send(:/, 2))
assert_equal(1.0, 2.0.send(:/, (2**32).coerce(2).first))
assert_equal(1.0, 2.0.send(:/, 2.0))
assert_raise(TypeError) { 2.0.send(:/, nil) }
end
def test_modulo2
assert_equal(0.0, 2.0.send(:%, 2))
assert_equal(0.0, 2.0.send(:%, (2**32).coerce(2).first))
assert_equal(0.0, 2.0.send(:%, 2.0))
assert_raise(TypeError) { 2.0.send(:%, nil) }
end
def test_divmod2
assert_equal([1.0, 0.0], 2.0.divmod(2))
assert_equal([1.0, 0.0], 2.0.divmod((2**32).coerce(2).first))
assert_equal([1.0, 0.0], 2.0.divmod(2.0))
assert_raise(TypeError) { 2.0.divmod(nil) }
inf = 1.0 / 0.0
a, b = inf.divmod(0)
assert(a.infinite?)
assert(b.nan?)
a, b = (2.0**32).divmod(1.0)
assert_equal(2**32, a)
assert_equal(0, b)
end
def test_pow
assert_equal(1.0, 1.0 ** (2**32))
assert_equal(1.0, 1.0 ** 1.0)
assert_raise(TypeError) { 1.0 ** nil }
end
def test_eql
inf = 1.0 / 0.0
nan = inf / inf
assert(1.0.eql?(1.0))
assert(inf.eql?(inf))
assert(!(nan.eql?(nan)))
assert(!(1.0.eql?(nil)))
assert(1.0 == 1)
assert(1.0 != 2**32)
assert(1.0 != nan)
assert(1.0 != nil)
end
def test_cmp
inf = 1.0 / 0.0
nan = inf / inf
assert_equal(0, 1.0 <=> 1.0)
assert_equal(1, 1.0 <=> 0.0)
assert_equal(-1, 1.0 <=> 2.0)
assert_nil(1.0 <=> nil)
assert_nil(1.0 <=> nan)
assert_nil(nan <=> 1.0)
assert_equal(0, 1.0 <=> 1)
assert_equal(1, 1.0 <=> 0)
assert_equal(-1, 1.0 <=> 2)
assert_equal(-1, 1.0 <=> 2**32)
assert_raise(ArgumentError) { 1.0 > nil }
assert_raise(ArgumentError) { 1.0 >= nil }
assert_raise(ArgumentError) { 1.0 < nil }
assert_raise(ArgumentError) { 1.0 <= nil }
end
def test_zero_p
assert(0.0.zero?)
assert(!(1.0.zero?))
end
def test_infinite_p
inf = 1.0 / 0.0
assert(1, inf.infinite?)
assert(1, (-inf).infinite?)
assert_nil(1.0.infinite?)
end
def test_finite_p
inf = 1.0 / 0.0
assert(!(inf.finite?))
assert(!((-inf).finite?))
assert(1.0.finite?)
end
def test_floor_ceil_round_truncate
assert_equal(1, 1.5.floor)
assert_equal(2, 1.5.ceil)
assert_equal(2, 1.5.round)
assert_equal(1, 1.5.truncate)
assert_equal(2, 2.0.floor)
assert_equal(2, 2.0.ceil)
assert_equal(2, 2.0.round)
assert_equal(2, 2.0.truncate)
assert_equal(-2, (-1.5).floor)
assert_equal(-1, (-1.5).ceil)
assert_equal(-2, (-1.5).round)
assert_equal(-1, (-1.5).truncate)
assert_equal(-2, (-2.0).floor)
assert_equal(-2, (-2.0).ceil)
assert_equal(-2, (-2.0).round)
assert_equal(-2, (-2.0).truncate)
inf = 1.0/0.0
assert_raise(FloatDomainError) { inf.floor }
assert_raise(FloatDomainError) { inf.ceil }
assert_raise(FloatDomainError) { inf.round }
assert_raise(FloatDomainError) { inf.truncate }
assert_equal(1.100, 1.111.round(1))
assert_equal(1.110, 1.111.round(2))
assert_equal(11110.0, 11111.1.round(-1))
assert_equal(11100.0, 11111.1.round(-2))
end
def test_induced_from
assert_equal(1.0, Float.induced_from(1))
assert_equal(1.0, Float.induced_from(1.0))
assert_raise(TypeError) { Float.induced_from(nil) }
end
end
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