* numeric.c (flo_round): substitute machine dependent magic number.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33158 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 13 insertions, 0 deletions

diff --git a/test/ruby/test_float.rb b/test/ruby/test_float.rb
index fb37d73831..c244447bd7 100644
--- a/test/ruby/test_float.rb
+++ b/test/ruby/test_float.rb
@@ -315,7 +315,9 @@ class TestFloat < Test::Unit::TestCase
     assert_raise(FloatDomainError) { inf.ceil }
     assert_raise(FloatDomainError) { inf.round }
     assert_raise(FloatDomainError) { inf.truncate }
+  end
 
+  def test_round_with_precision
     assert_equal(1.100, 1.111.round(1))
     assert_equal(1.110, 1.111.round(2))
     assert_equal(11110.0, 11111.1.round(-1))
@@ -323,6 +325,17 @@ class TestFloat < Test::Unit::TestCase
 
     assert_equal(10**300, 1.1e300.round(-300))
     assert_equal(-10**300, -1.1e300.round(-300))
+    assert_equal(1.0e-300, 1.1e-300.round(300))
+    assert_equal(-1.0e-300, -1.1e-300.round(300))
+
+    bug5227 = '[ruby-core:39093]'
+    assert_equal(42.0, 42.0.round(308), bug5227)
+    assert_equal(1.0e307, 1.0e307.round(2), bug5227)
+
+    assert_raise(TypeError) {1.0.round("4")}
+    assert_raise(TypeError) {1.0.round(nil)}
+    def (prec = Object.new).to_int; 2; end
+    assert_equal(1.0, 0.998.round(prec))
   end
 
   VS = [