1 files changed, 26 insertions, 0 deletions
diff --git a/spec/ruby/core/matchdata/string_spec.rb b/spec/ruby/core/matchdata/string_spec.rb
new file mode 100644
index 0000000000..952e953318
--- /dev/null
+++ b/spec/ruby/core/matchdata/string_spec.rb
@@ -0,0 +1,26 @@
+require_relative '../../spec_helper'
+
+describe "MatchData#string" do
+  it "returns a copy of the match string" do
+    str = /(.)(.)(\d+)(\d)/.match("THX1138.").string
+    str.should == "THX1138."
+  end
+
+  it "returns a frozen copy of the match string" do
+    str = /(.)(.)(\d+)(\d)/.match("THX1138.").string
+    str.should == "THX1138."
+    str.should.frozen?
+  end
+
+  it "returns the same frozen string for every call" do
+    md = /(.)(.)(\d+)(\d)/.match("THX1138.")
+    md.string.should equal(md.string)
+  end
+
+  it "returns a frozen copy of the matched string for gsub!(String)" do
+    s = +'he[[o'
+    s.gsub!('[', ']')
+    $~.string.should == 'he[[o'
+    $~.string.should.frozen?
+  end
+end