1 files changed, 45 insertions, 0 deletions
diff --git a/spec/ruby/core/kernel/taint_spec.rb b/spec/ruby/core/kernel/taint_spec.rb
new file mode 100644
index 0000000000..0c2fb3286b
--- /dev/null
+++ b/spec/ruby/core/kernel/taint_spec.rb
@@ -0,0 +1,45 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes', __FILE__)
+
+describe "Kernel#taint" do
+  it "returns self" do
+    o = Object.new
+    o.taint.should equal(o)
+  end
+
+  it "sets the tainted bit" do
+    o = Object.new
+    o.taint
+    o.tainted?.should == true
+  end
+
+  it "raises RuntimeError on an untainted, frozen object" do
+    o = Object.new.freeze
+    lambda { o.taint }.should raise_error(RuntimeError)
+  end
+
+  it "does not raise an error on a tainted, frozen object" do
+    o = Object.new.taint.freeze
+    o.taint.should equal(o)
+  end
+
+  it "has no effect on immediate values" do
+    [nil, true, false].each do |v|
+      v.taint
+      v.tainted?.should == false
+    end
+  end
+
+  it "no raises a RuntimeError on symbols" do
+    v = :sym
+    lambda { v.taint }.should_not raise_error(RuntimeError)
+    v.tainted?.should == false
+  end
+
+  it "no raises error on fixnum values" do
+    [1].each do |v|
+      lambda { v.taint }.should_not raise_error(RuntimeError)
+      v.tainted?.should == false
+    end
+  end
+end