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# -*- encoding: binary -*-
require_relative '../../../spec_helper'
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 "returns the problematic bytes for UTF-16LE" 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.should == "a\x00".force_encoding("utf-16le")
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(2).should == "a\x00".force_encoding("utf-16le")
ec.putback.should == ""
end
end
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