spec/rubyspec/core/encoding/undefined_conversion_error/source_encoding_spec.rb


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require File.expand_path('../../fixtures/classes', __FILE__)

with_feature :encoding do
  describe "Encoding::UndefinedConversionError#source_encoding" do
    before :each do
      @exception = EncodingSpecs::UndefinedConversionError.exception
      @exception2 = EncodingSpecs::UndefinedConversionErrorIndirect.exception
    end

    it "returns an Encoding object" do
      @exception.source_encoding.should be_an_instance_of(Encoding)
      @exception2.source_encoding.should be_an_instance_of(Encoding)
    end

    it "is equal to the source encoding of the object that raised it" do
      @exception.source_encoding.should == Encoding::UTF_8
    end

    # The source encoding specified in the Encoding::Converter constructor may
    # differ from the source encoding returned here. What seems to happen is
    # that when transcoding along a path with multiple pairs of encodings, the
    # last one encountered when the error occurred is returned. So in this
    # case, the conversion path is ISO-8859-1 -> UTF-8 -> EUC-JP. The
    # conversion from ISO-8859-1 -> UTF-8 succeeded, but the conversion from
    # UTF-8 to EUC-JP failed. IOW, it failed when the source encoding was
    # UTF-8, so UTF-8 is regarded as the source encoding.
    it "is equal to the source encoding at the stage of the conversion path where the error occured" do
      @exception2.source_encoding.should == Encoding::UTF_8
    end
  end
end