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# coding: utf-8
require File.dirname(__FILE__) + "/../../spec_helper"
describe PDF::Reader::Filter::Flate do
it "should inflate a RFC1950 (zlib) deflated stream correctly"
it "should inflate a raw RFC1951 deflated stream correctly"
it "should inflate a deflated stream with PNG predictors correctly" do
filter = PDF::Reader::Filter::Flate.new(:Columns => 5, :Predictor => 12)
deflated_data = binread(File.dirname(__FILE__) + "/../../data/deflated_with_predictors.dat")
depredicted_data = binread(File.dirname(__FILE__) + "/../../data/deflated_with_predictors_result.dat")
filter.filter(deflated_data).should eql(depredicted_data)
end
it "should inflate a deflated stream with tiff predictors correctly" do
filter = PDF::Reader::Filter::Flate.new(:Columns => 5, :Predictor => 2, :Colors => 3)
original_data = "abcabcabcabcabcabcabcabcabcabc"
predicted_data = "abc\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00abc\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"
deflated_data = Zlib::Deflate.deflate(predicted_data)
filter.filter(deflated_data).should eql(original_data)
end
end
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