119 lines
3.1 KiB
Ruby
119 lines
3.1 KiB
Ruby
require 'test/unit'
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class TestFloat < Test::Unit::TestCase
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def test_float
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assert_equal(2, 2.6.floor)
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assert_equal(-3, (-2.6).floor)
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assert_equal(3, 2.6.ceil)
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assert_equal(-2, (-2.6).ceil)
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assert_equal(2, 2.6.truncate)
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assert_equal(-2, (-2.6).truncate)
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assert_equal(3, 2.6.round)
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assert_equal(-2, (-2.4).truncate)
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assert((13.4 % 1 - 0.4).abs < 0.0001)
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end
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def nan_test(x,y)
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extend Test::Unit::Assertions
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assert(x != y)
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assert_equal(false, (x < y))
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assert_equal(false, (x > y))
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assert_equal(false, (x <= y))
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assert_equal(false, (x >= y))
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end
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def test_nan
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nan = 0.0/0
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nan_test(nan, nan)
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nan_test(nan, 0)
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nan_test(nan, 1)
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nan_test(nan, -1)
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nan_test(nan, 1000)
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nan_test(nan, -1000)
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nan_test(nan, 1_000_000_000_000)
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nan_test(nan, -1_000_000_000_000)
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nan_test(nan, 100.0);
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nan_test(nan, -100.0);
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nan_test(nan, 0.001);
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nan_test(nan, -0.001);
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nan_test(nan, 1.0/0);
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nan_test(nan, -1.0/0);
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end
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def test_precision
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u = 3.7517675036461267e+17
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v = sprintf("%.16e", u).to_f
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assert_in_delta(u, v, u.abs * Float::EPSILON)
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assert_in_delta(u, v, v.abs * Float::EPSILON)
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end
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def test_symmetry_bignum # [ruby-bugs-ja:118]
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a = 100000000000000000000000
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b = 100000000000000000000000.0
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assert_equal(a == b, b == a)
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end
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def test_strtod
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a = Float("0")
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assert(a.abs < Float::EPSILON)
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a = Float("0.0")
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assert(a.abs < Float::EPSILON)
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a = Float("+0.0")
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assert(a.abs < Float::EPSILON)
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a = Float("-0.0")
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assert(a.abs < Float::EPSILON)
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a = Float("0.0000000000000000001")
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assert(a != 0.0)
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a = Float("+0.0000000000000000001")
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assert(a != 0.0)
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a = Float("-0.0000000000000000001")
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assert(a != 0.0)
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a = Float(".0")
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assert(a.abs < Float::EPSILON)
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a = Float("+.0")
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assert(a.abs < Float::EPSILON)
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a = Float("-.0")
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assert(a.abs < Float::EPSILON)
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a = Float("0.")
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assert(a.abs < Float::EPSILON)
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a = Float("+0.")
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assert(a.abs < Float::EPSILON)
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a = Float("-0.")
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assert(a.abs < Float::EPSILON)
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assert_raise(ArgumentError){Float(".")}
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assert_raise(ArgumentError){Float("+")}
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assert_raise(ArgumentError){Float("+.")}
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assert_raise(ArgumentError){Float("-")}
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assert_raise(ArgumentError){Float("-.")}
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assert_raise(ArgumentError){Float("1e")}
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# add expected behaviour here.
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end
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def test_divmod
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assert_equal([2, 3.5], 11.5.divmod(4))
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assert_equal([-3, -0.5], 11.5.divmod(-4))
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assert_equal([-3, 0.5], (-11.5).divmod(4))
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assert_equal([2, -3.5], (-11.5).divmod(-4))
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end
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def test_div
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assert_equal(2, 11.5.div(4))
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assert_equal(-3, 11.5.div(-4))
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assert_equal(-3, (-11.5).div(4))
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assert_equal(2, (-11.5).div(-4))
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end
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def test_modulo
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assert_equal(3.5, 11.5.modulo(4))
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assert_equal(-0.5, 11.5.modulo(-4))
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assert_equal(0.5, (-11.5).modulo(4))
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assert_equal(-3.5, (-11.5).modulo(-4))
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end
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def test_remainder
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assert_equal(3.5, 11.5.remainder(4))
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assert_equal(3.5, 11.5.remainder(-4))
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assert_equal(-3.5, (-11.5).remainder(4))
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assert_equal(-3.5, (-11.5).remainder(-4))
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end
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end
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