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require 'test/unit'
$KCODE = 'none'
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 test_nan
nan = 0.0/0
def nan.test(v)
extend Test::Unit::Assertions
assert(self != v)
assert_equal(false, (self < v))
assert_equal(false, (self > v))
assert_equal(false, (self <= v))
assert_equal(false, (self >= v))
end
nan.test(nan)
nan.test(0)
nan.test(1)
nan.test(-1)
nan.test(1000)
nan.test(-1000)
nan.test(1_000_000_000_000)
nan.test(-1_000_000_000_000)
nan.test(100.0);
nan.test(-100.0);
nan.test(0.001);
nan.test(-0.001);
nan.test(1.0/0);
nan.test(-1.0/0);
end
def test_precision
#s = "3.7517675036461267e+17"
#assert(s == sprintf("%.16e", s.to_f))
f = 3.7517675036461267e+17
assert_equal(f, sprintf("%.16e", f).to_f)
end
end
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