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-rw-r--r--test/ruby/test_float.rb18
1 files changed, 18 insertions, 0 deletions
diff --git a/test/ruby/test_float.rb b/test/ruby/test_float.rb
index fbf0d87f8e..b218b72db5 100644
--- a/test/ruby/test_float.rb
+++ b/test/ruby/test_float.rb
@@ -171,6 +171,24 @@ class TestFloat < Test::Unit::TestCase
assert_raise(ArgumentError, n += z + "A") {Float(n)}
assert_raise(ArgumentError, n += z + ".0") {Float(n)}
end
+
+ x = nil
+ 2000.times do
+ x = Float("0x"+"0"*30)
+ break unless x == 0.0
+ end
+ assert_equal(0.0, x, ->{"%a" % x})
+ x = nil
+ 2000.times do
+ begin
+ x = Float("0x1."+"0"*270)
+ rescue ArgumentError => e
+ raise unless /"0x1\.0{270}"/ =~ e.message
+ else
+ break
+ end
+ end
+ assert_nil(x, ->{"%a" % x})
end
def test_divmod