1 files changed, 50 insertions, 0 deletions
diff --git a/spec/ruby/core/encoding/converter/putback_spec.rb b/spec/ruby/core/encoding/converter/putback_spec.rb
new file mode 100644
index 0000000000..69ce59e89b
--- /dev/null
+++ b/spec/ruby/core/encoding/converter/putback_spec.rb
@@ -0,0 +1,50 @@
+# -*- encoding: binary -*-
+require File.expand_path('../../../../spec_helper', __FILE__)
+
+with_feature :encoding do
+  describe "Encoding::Converter#putback" do
+    before :each do
+      @ec = Encoding::Converter.new("EUC-JP", "ISO-8859-1")
+      @ret = @ec.primitive_convert(@src="abc\xa1def", @dst="", nil, 10)
+    end
+
+    it "returns a String" do
+      @ec.putback.should be_an_instance_of(String)
+    end
+
+    it "returns a String in the source encoding" do
+      @ec.putback.encoding.should == Encoding::EUC_JP
+    end
+
+    it "returns the bytes buffered due to an :invalid_byte_sequence error" do
+      @ret.should == :invalid_byte_sequence
+      @ec.putback.should == 'd'
+      @ec.primitive_errinfo.last.should == 'd'
+    end
+
+    it "allows conversion to be resumed after an :invalid_byte_sequence" do
+      @src = @ec.putback + @src
+      @ret = @ec.primitive_convert(@src, @dst, nil, 10)
+      @ret.should == :finished
+      @dst.should == "abcdef"
+      @src.should == ""
+    end
+
+    it "returns an empty String when there are no more bytes to put back" do
+      @ec.putback
+      @ec.putback.should == ""
+    end
+
+    it "accepts an integer argument corresponding to the number of bytes to be put back" do
+      ec = Encoding::Converter.new("utf-16le", "iso-8859-1")
+      src = "\x00\xd8\x61\x00"
+      dst = ""
+      ec.primitive_convert(src, dst).should == :invalid_byte_sequence
+      ec.primitive_errinfo.should ==
+        [:invalid_byte_sequence, "UTF-16LE", "UTF-8", "\x00\xD8", "a\x00"]
+      ec.putback(1).should == "\x00".force_encoding("utf-16le")
+      ec.putback.should == "a".force_encoding("utf-16le")
+      ec.putback.should == ""
+    end
+  end
+end