1 files changed, 22 insertions, 0 deletions
diff --git a/test/ruby/test_float.rb b/test/ruby/test_float.rb
index 9c4550e38d..ff4cf3fba1 100644
--- a/test/ruby/test_float.rb
+++ b/test/ruby/test_float.rb
@@ -405,4 +405,26 @@ class TestFloat < Test::Unit::TestCase
     }
   end
 
+  def test_Float
+    assert_in_delta(0.125, Float("0.1_2_5"), 0.00001)
+    assert_in_delta(0.125, "0.1_2_5__".to_f, 0.00001)
+    assert(Float(([1] * 10000).join).infinite?)
+    assert(!Float(([1] * 10000).join("_")).infinite?) # is it really OK?
+    assert_raise(ArgumentError) { Float("1.0\x001") }
+    assert(Float("1e10_00").infinite?)
+    assert_raise(TypeError) { Float(nil) }
+    o = Object.new
+    def o.to_f; inf = 1.0/0.0; inf/inf; end
+    assert_raise(ArgumentError) { Float(o) }
+  end
+
+  def test_num2dbl
+    assert_raise(TypeError) do
+      1.0.step(2.0, "0.5") {}
+    end
+    assert_raise(TypeError) do
+      1.0.step(2.0, nil) {}
+    end
+  end
+
 end