* bigdecimal/bigdecimal.c (VpDup) a new function for duplicating

  a BigDecimal.

* bigdecimal/bigdecimal.c (BigDecimal_new): support generating a new
  BigDecimal from another BigDecimal using BigDecimal global function
  or constructor.  [ruby-dev:44245]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@32674 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 26 insertions, 0 deletions

diff --git a/test/bigdecimal/test_bigdecimal.rb b/test/bigdecimal/test_bigdecimal.rb
index 96211a09c7..e34cbc59c5 100644
--- a/test/bigdecimal/test_bigdecimal.rb
+++ b/test/bigdecimal/test_bigdecimal.rb
@@ -74,6 +74,19 @@ class TestBigDecimal < Test::Unit::TestCase
     assert_nothing_raised { BigDecimal(0.1, Float::DIG + 1) }
   end
 
+  def test_global_new_with_big_decimal
+    assert_equal(BigDecimal(1), BigDecimal(BigDecimal(1)))
+    assert_equal(BigDecimal('+0'), BigDecimal(BigDecimal('+0')))
+    assert_equal(BigDecimal('-0'), BigDecimal(BigDecimal('-0')))
+    BigDecimal.save_exception_mode do
+      BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
+      BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
+      assert_positive_infinite(BigDecimal(BigDecimal('Infinity')))
+      assert_negative_infinite(BigDecimal(BigDecimal('-Infinity')))
+      assert_nan(BigDecimal(BigDecimal('NaN')))
+    end
+  end
+
   def test_new
     assert_equal(1, BigDecimal.new("1"))
     assert_equal(1, BigDecimal.new("1", 1))
@@ -111,6 +124,19 @@ class TestBigDecimal < Test::Unit::TestCase
     assert_nothing_raised { BigDecimal.new(0.1, Float::DIG + 1) }
   end
 
+  def test_new_with_big_decimal
+    assert_equal(BigDecimal(1), BigDecimal.new(BigDecimal(1)))
+    assert_equal(BigDecimal('+0'), BigDecimal.new(BigDecimal('+0')))
+    assert_equal(BigDecimal('-0'), BigDecimal.new(BigDecimal('-0')))
+    BigDecimal.save_exception_mode do
+      BigDecimal.mode(BigDecimal::EXCEPTION_OVERFLOW, false)
+      BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
+      assert_positive_infinite(BigDecimal.new(BigDecimal('Infinity')))
+      assert_negative_infinite(BigDecimal.new(BigDecimal('-Infinity')))
+      assert_nan(BigDecimal(BigDecimal.new('NaN')))
+    end
+  end
+
   def _test_mode(type)
     BigDecimal.mode(type, true)
     assert_raise(FloatDomainError) { yield }