1 files changed, 52 insertions, 0 deletions
diff --git a/spec/ruby/core/string/rstrip_spec.rb b/spec/ruby/core/string/rstrip_spec.rb
new file mode 100644
index 0000000000..9dd686ce55
--- /dev/null
+++ b/spec/ruby/core/string/rstrip_spec.rb
@@ -0,0 +1,52 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require File.expand_path('../fixtures/classes.rb', __FILE__)
+
+describe "String#rstrip" do
+  it "returns a copy of self with trailing whitespace removed" do
+    "  hello  ".rstrip.should == "  hello"
+    "  hello world  ".rstrip.should == "  hello world"
+    "  hello world \n\r\t\n\v\r".rstrip.should == "  hello world"
+    "hello".rstrip.should == "hello"
+    "hello\x00".rstrip.should == "hello"
+  end
+
+  it "returns a copy of self with all trailing whitespace and NULL bytes removed" do
+    "\x00 \x00hello\x00 \x00".rstrip.should == "\x00 \x00hello"
+  end
+
+  it "taints the result when self is tainted" do
+    "".taint.rstrip.tainted?.should == true
+    "ok".taint.rstrip.tainted?.should == true
+    "ok    ".taint.rstrip.tainted?.should == true
+  end
+end
+
+describe "String#rstrip!" do
+  it "modifies self in place and returns self" do
+    a = "  hello  "
+    a.rstrip!.should equal(a)
+    a.should == "  hello"
+  end
+
+  it "modifies self removing trailing NULL bytes and whitespace" do
+    a = "\x00 \x00hello\x00 \x00"
+    a.rstrip!
+    a.should == "\x00 \x00hello"
+  end
+
+  it "returns nil if no modifications were made" do
+    a = "hello"
+    a.rstrip!.should == nil
+    a.should == "hello"
+  end
+
+  it "raises a RuntimeError on a frozen instance that is modified" do
+    lambda { "  hello  ".freeze.rstrip! }.should raise_error(RuntimeError)
+  end
+
+  # see [ruby-core:23666]
+  it "raises a RuntimeError on a frozen instance that would not be modified" do
+    lambda { "hello".freeze.rstrip! }.should raise_error(RuntimeError)
+    lambda { "".freeze.rstrip!      }.should raise_error(RuntimeError)
+  end
+end