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author | mrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2011-07-26 16:17:04 +0000 |
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committer | mrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2011-07-26 16:17:04 +0000 |
commit | 2621ba04cbecb4cd22772d1a76d91beddfcc8878 (patch) | |
tree | a41a9ebe4ad1457dd7714e767148c699514eb0f9 /test/bigdecimal | |
parent | a3edf1a48e4f1dc5d68f50a95d7a0f595b97f7af (diff) |
Merge revisions 32676, 32677, 32679, 32680:
* ext/bigdecimal/lib/bigdecimal/util.rb (Rational#to_d):
zero or negative precision is error. fixes #5098.
[ruby-dev:44210]
* ext/bigdecimal/lib/bigdecimal/util.rb (Float#to_d): modified for
specifying precision. fixes #5098. [ruby-dev:44210]
* ext/bigdecimal/lib/bigdecimal/util.rb (Integer#to_d): added
for symmetry to BigDecimal() function with an Integer.
fixes #5098. [ruby-dev:44210]
* ext/bigdecimal/lib/bigdecimal/util.rb (BigDecimal#to_d): added
for adapting other Numeric subclasses. [ruby-dev:44245]
* test/bigdecimal/test_bigdecimal_util.rb: add tests for the above
changes.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@32687 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'test/bigdecimal')
-rw-r--r-- | test/bigdecimal/test_bigdecimal_util.rb | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/test/bigdecimal/test_bigdecimal_util.rb b/test/bigdecimal/test_bigdecimal_util.rb new file mode 100644 index 0000000000..72342b922f --- /dev/null +++ b/test/bigdecimal/test_bigdecimal_util.rb @@ -0,0 +1,43 @@ +require_relative "testbase" + +require 'bigdecimal/util' + +class TestBigDecimalUtil < Test::Unit::TestCase + def test_BigDecimal_to_d + x = BigDecimal(1) + assert_same(x, x.to_d) + end + + def test_Integer_to_d + assert_equal(BigDecimal(1), 1.to_d) + assert_equal(BigDecimal(2<<100), (2<<100).to_d) + end + + def test_Float_to_d_without_precision + delta = 1.0/10**(Float::DIG + 1) + assert_in_delta(BigDecimal(0.5, Float::DIG+1), 0.5.to_d, delta) + assert_in_delta(BigDecimal(355.0/113.0, Float::DIG+1), (355.0/113.0).to_d, delta) + end + + def test_Float_to_d_with_precision + digits = 5 + delta = 1.0/10**(digits) + assert_in_delta(BigDecimal(0.5, 5), 0.5.to_d(digits), delta) + assert_in_delta(BigDecimal(355.0/113.0, 5), (355.0/113.0).to_d(digits), delta) + end + + def test_Rational_to_d + digits = 100 + delta = 1.0/10**(digits) + assert_in_delta(BigDecimal(1.quo(2), digits), 1.quo(2).to_d(digits), delta) + assert_in_delta(BigDecimal(355.quo(113), digits), 355.quo(113).to_d(digits), delta) + end + + def test_Rational_to_d_with_zero_precision + assert_raise(ArgumentError) { 355.quo(113).to_d(0) } + end + + def test_Rational_to_d_with_negative_precision + assert_raise(ArgumentError) { 355.quo(113).to_d(-42) } + end +end |