1 files changed, 52 insertions, 0 deletions
diff --git a/spec/ruby/core/string/reverse_spec.rb b/spec/ruby/core/string/reverse_spec.rb
new file mode 100644
index 0000000000..c37e815ba3
--- /dev/null
+++ b/spec/ruby/core/string/reverse_spec.rb
@@ -0,0 +1,52 @@
+# encoding: utf-8
+
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes.rb', __FILE__)
+
+describe "String#reverse" do
+  it "returns a new string with the characters of self in reverse order" do
+    "stressed".reverse.should == "desserts"
+    "m".reverse.should == "m"
+    "".reverse.should == ""
+  end
+
+  it "taints the result if self is tainted" do
+    "".taint.reverse.tainted?.should == true
+    "m".taint.reverse.tainted?.should == true
+  end
+
+  with_feature :encoding do
+    it "reverses a string with multi byte characters" do
+      "微軟正黑體".reverse.should == "體黑正軟微"
+    end
+  end
+
+end
+
+describe "String#reverse!" do
+  it "reverses self in place and always returns self" do
+    a = "stressed"
+    a.reverse!.should equal(a)
+    a.should == "desserts"
+
+    "".reverse!.should == ""
+  end
+
+  it "raises a RuntimeError on a frozen instance that is modified" do
+    lambda { "anna".freeze.reverse!  }.should raise_error(RuntimeError)
+    lambda { "hello".freeze.reverse! }.should raise_error(RuntimeError)
+  end
+
+  # see [ruby-core:23666]
+  it "raises a RuntimeError on a frozen instance that would not be modified" do
+    lambda { "".freeze.reverse! }.should raise_error(RuntimeError)
+  end
+
+  with_feature :encoding do
+    it "reverses a string with multi byte characters" do
+      str = "微軟正黑體"
+      str.reverse!
+      str.should == "體黑正軟微"
+    end
+  end
+end