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70d89f2c16
revive zero and implicit precision support as a deprecated feature. * test/bigdecimal/test_bigdecimal_util.rb: modify a test for the above change. * NEWS: describes the above change. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@32753 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
43 lines
1.3 KiB
Ruby
43 lines
1.3 KiB
Ruby
require_relative "testbase"
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require 'bigdecimal/util'
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class TestBigDecimalUtil < Test::Unit::TestCase
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def test_BigDecimal_to_d
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x = BigDecimal(1)
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assert_same(x, x.to_d)
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end
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def test_Integer_to_d
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assert_equal(BigDecimal(1), 1.to_d)
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assert_equal(BigDecimal(2<<100), (2<<100).to_d)
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end
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def test_Float_to_d_without_precision
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delta = 1.0/10**(Float::DIG + 1)
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assert_in_delta(BigDecimal(0.5, Float::DIG+1), 0.5.to_d, delta)
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assert_in_delta(BigDecimal(355.0/113.0, Float::DIG+1), (355.0/113.0).to_d, delta)
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end
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def test_Float_to_d_with_precision
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digits = 5
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delta = 1.0/10**(digits)
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assert_in_delta(BigDecimal(0.5, 5), 0.5.to_d(digits), delta)
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assert_in_delta(BigDecimal(355.0/113.0, 5), (355.0/113.0).to_d(digits), delta)
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end
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def test_Rational_to_d
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digits = 100
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delta = 1.0/10**(digits)
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assert_in_delta(BigDecimal(1.quo(2), digits), 1.quo(2).to_d(digits), delta)
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assert_in_delta(BigDecimal(355.quo(113), digits), 355.quo(113).to_d(digits), delta)
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end
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def test_Rational_to_d_with_zero_precision
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assert_equal(355.quo(113).to_d, 355.quo(113).to_d(BigDecimal.double_fig*2+1))
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end
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def test_Rational_to_d_with_negative_precision
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assert_raise(ArgumentError) { 355.quo(113).to_d(-42) }
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end
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end
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