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authormrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2011-07-26 15:48:25 +0000
committermrkn <mrkn@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2011-07-26 15:48:25 +0000
commit079fb8d4c369cfc7d450d6e4d02b112596dcb5ee (patch)
tree96248be4d9cb5747abd8dde11d35c1cde1b5f40b /test
parent2fd6b26620b1f9e25f204f05524b8086f7c8d23e (diff)
* ext/bigdecimal/lib/bigdecimal/util.rb (Float#to_d): modified for
specifying precision. fixes #5098. [ruby-dev:44210] * test/bigdecimal/test_bigdecimal_util.rb: add test for the above change. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32679 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'test')
-rw-r--r--test/bigdecimal/test_bigdecimal_util.rb13
1 files changed, 13 insertions, 0 deletions
diff --git a/test/bigdecimal/test_bigdecimal_util.rb b/test/bigdecimal/test_bigdecimal_util.rb
index 5f03b734cf..87b4f20e99 100644
--- a/test/bigdecimal/test_bigdecimal_util.rb
+++ b/test/bigdecimal/test_bigdecimal_util.rb
@@ -12,4 +12,17 @@ class TestBigDecimalUtil < Test::Unit::TestCase
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
end