[ruby/bigdecimal] Use pre-allocated objects for special values

https://github.com/ruby/bigdecimal/commit/95c201f2d3

1 files changed, 7 insertions, 1 deletions

diff --git a/test/bigdecimal/test_bigdecimal.rb b/test/bigdecimal/test_bigdecimal.rb
index b15b046f4c..e8fd85a526 100644
--- a/test/bigdecimal/test_bigdecimal.rb
+++ b/test/bigdecimal/test_bigdecimal.rb
@@ -150,17 +150,23 @@ class TestBigDecimal < Test::Unit::TestCase
     assert_raise(ArgumentError) { BigDecimal(0.1, Float::DIG + 2) }
     assert_nothing_raised { BigDecimal(0.1, Float::DIG + 1) }
 
+    assert_same(BigDecimal(0.0), BigDecimal(0.0))
+    assert_same(BigDecimal(-0.0), BigDecimal(-0.0))
+
     bug9214 = '[ruby-core:58858]'
-    assert_equal(BigDecimal(-0.0, Float::DIG).sign, -1, bug9214)
+    assert_equal(BigDecimal(-0.0).sign, -1, bug9214)
 
     BigDecimal.save_exception_mode do
       BigDecimal.mode(BigDecimal::EXCEPTION_NaN, false)
       assert_nan(BigDecimal(Float::NAN))
+      assert_same(BigDecimal(Float::NAN), BigDecimal(Float::NAN))
     end
     BigDecimal.save_exception_mode do
       BigDecimal.mode(BigDecimal::EXCEPTION_INFINITY, false)
       assert_positive_infinite(BigDecimal(Float::INFINITY))
+      assert_same(BigDecimal(Float::INFINITY), BigDecimal(Float::INFINITY))
       assert_negative_infinite(BigDecimal(-Float::INFINITY))
+      assert_same(BigDecimal(-Float::INFINITY), BigDecimal(-Float::INFINITY))
     end
   end