1 files changed, 25 insertions, 0 deletions
diff --git a/spec/ruby/core/kernel/untaint_spec.rb b/spec/ruby/core/kernel/untaint_spec.rb
new file mode 100644
index 0000000000..5abe5d63fc
--- /dev/null
+++ b/spec/ruby/core/kernel/untaint_spec.rb
@@ -0,0 +1,25 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Kernel#untaint" do
+  it "returns self" do
+    o = Object.new
+    o.untaint.should equal(o)
+  end
+
+  it "clears the tainted bit" do
+    o = Object.new.taint
+    o.untaint
+    o.tainted?.should == false
+  end
+
+  it "raises RuntimeError on a tainted, frozen object" do
+    o = Object.new.taint.freeze
+    lambda { o.untaint }.should raise_error(RuntimeError)
+  end
+
+  it "does not raise an error on an untainted, frozen object" do
+    o = Object.new.freeze
+    o.untaint.should equal(o)
+  end
+end