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require File.expand_path('../../../../spec_helper', __FILE__)
with_feature :encoding do
describe "Encoding::Converter#convpath" do
before(:all) do
@perms = Encoding.name_list.permutation(2).map do |pair|
Encoding::Converter.new(pair.first, pair.last) rescue nil
end.compact.map{|ec| ec.convpath}
end
it "returns an Array" do
ec = Encoding::Converter.new('ASCII', 'EUC-JP')
ec.convpath.should be_an_instance_of(Array)
end
it "returns each encoding pair as a sub-Array" do
ec = Encoding::Converter.new('ASCII', 'EUC-JP')
ec.convpath.first.should be_an_instance_of(Array)
ec.convpath.first.size.should == 2
end
it "returns each encoding as an Encoding object" do
ec = Encoding::Converter.new('ASCII', 'EUC-JP')
ec.convpath.first.first.should be_an_instance_of(Encoding)
ec.convpath.first.last.should be_an_instance_of(Encoding)
end
it "returns multiple encoding pairs when direct conversion is impossible" do
ec = Encoding::Converter.new('ascii','Big5')
ec.convpath.size.should == 2
ec.convpath.first.first.should == Encoding::US_ASCII
ec.convpath.first.last.should == ec.convpath.last.first
ec.convpath.last.last.should == Encoding::Big5
end
it "sets the last element of each pair to the first element of the next" do
@perms.each do |convpath|
next if convpath.size == 1
convpath.each_with_index do |pair, idx|
break if idx == convpath.size - 1
pair.last.should == convpath[idx+1].first
end
end
end
it "only lists a source encoding once" do
@perms.each do |convpath|
next if convpath.size < 2
seen = Hash.new(false)
convpath.each_with_index do |pair, idx|
seen.key?(pair.first).should be_false if idx > 0
seen[pair.first] = true
end
end
end
it "indicates if crlf_newline conversion would occur" do
ec = Encoding::Converter.new("ISo-8859-1", "EUC-JP", {:crlf_newline => true})
ec.convpath.last.should == "crlf_newline"
ec = Encoding::Converter.new("ASCII", "UTF-8", {:crlf_newline => false})
ec.convpath.last.should_not == "crlf_newline"
end
end
end
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