1 files changed, 39 insertions, 0 deletions
diff --git a/spec/ruby/library/stringscanner/dup_spec.rb b/spec/ruby/library/stringscanner/dup_spec.rb
new file mode 100644
index 0000000000..2f0feff071
--- /dev/null
+++ b/spec/ruby/library/stringscanner/dup_spec.rb
@@ -0,0 +1,39 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+require 'strscan'
+
+describe "StringScanner#dup" do
+  before :each do
+    @string = "this is a test"
+    @orig_s = StringScanner.new(@string)
+  end
+
+  it "copies the passed StringScanner's content to self" do
+    s = @orig_s.dup
+    s.string.should == @string
+  end
+
+  it "copies the passed StringSCanner's position to self" do
+    @orig_s.pos = 5
+    s = @orig_s.dup
+    s.pos.should eql(5)
+  end
+
+  it "copies previous match state" do
+    @orig_s.scan(/\w+/)
+    @orig_s.scan(/\s/)
+
+    @orig_s.pre_match.should == "this"
+
+    s = @orig_s.dup
+    s.pre_match.should == "this"
+
+    s.unscan
+    s.scan(/\s/).should == " "
+  end
+
+  it "copies the passed StringScanner scan pointer to self" do
+    @orig_s.terminate
+    s = @orig_s.dup
+    s.eos?.should be_true
+  end
+end