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# typed: false
# coding: utf-8
# expose the xrefs hash inside the XRef class so we can ensure it's built correctly
class PDF::Reader::XRef
attr_reader :xref
end
describe PDF::Reader::XRef do
describe "initilisation" do
context "with cairo-basic.pdf" do
context "as a File" do
it "loads all xrefs correctly" do
filename = File.new(pdf_spec_file("cairo-basic"))
tbl = PDF::Reader::XRef.new(filename)
# 1 xref table with 16 items (ignore the first)
expect(tbl.xref.keys.size).to eql(15)
end
end
context "as a StringIO" do
it "loads all xrefs correctly" do
data = StringIO.new(binread(pdf_spec_file("cairo-basic")))
tbl = PDF::Reader::XRef.new(data)
# 1 xref table with 16 items (ignore the first)
expect(tbl.xref.keys.size).to eql(15)
end
end
end
context "with cairo-unicode.pdf" do
context "as a File" do
it "loads all xrefs correctly" do
file = File.new(pdf_spec_file("cairo-unicode"))
tbl = PDF::Reader::XRef.new(file)
# 1 xref table with 58 items (ignore the first)
expect(tbl.xref.keys.size).to eql(57)
end
end
context "as a StringIO" do
it "loads all xrefs correctly from a StringIO" do
data = StringIO.new(binread(pdf_spec_file("cairo-unicode")))
tbl = PDF::Reader::XRef.new(data)
# 1 xref table with 58 items (ignore the first)
expect(tbl.xref.keys.size).to eql(57)
end
end
end
context "with openoffice-2.2.pdf" do
it "loads all xrefs correctly" do
@file = File.new(pdf_spec_file("openoffice-2.2"))
@tbl = PDF::Reader::XRef.new(@file)
# 1 xref table with 29 items (ignore the first)
expect(@tbl.xref.keys.size).to eql(28)
end
end
context "with pdflatex.pdf" do
it "loads all xrefs correctly" do
@file = File.new(pdf_spec_file("pdflatex"))
@tbl = PDF::Reader::XRef.new(@file)
# 1 xref table with 360 items (but a bunch are ignored)
expect(@tbl.xref.keys.size).to eql(353)
end
end
context "with xref_subsecetions.pdf" do
context "with multiple xref sections with subsections and xref streams" do
it "loads all xrefs correctly" do
@file = File.new(pdf_spec_file("xref_subsections"))
@tbl = PDF::Reader::XRef.new(@file)
expect(@tbl.xref.keys.size).to eql(539)
end
end
end
context "with no_trailer.pdf" do
it "raises an error when attempting to locate the xref table" do
@file = File.new(pdf_spec_file("no_trailer"))
expect {
PDF::Reader::XRef.new(@file)
}.to raise_error(PDF::Reader::MalformedPDFError)
end
end
context "with trailer_is_not_a_dict.pdf" do
it "raises an error when attempting to locate the xref table" do
@file = File.new(pdf_spec_file("trailer_is_not_a_dict"))
expect {
PDF::Reader::XRef.new(@file)
}.to raise_error(PDF::Reader::MalformedPDFError)
end
end
context "with cross_ref_stream.pdf" do
let!(:file) { File.new(pdf_spec_file("cross_ref_stream"))}
subject { PDF::Reader::XRef.new(file)}
it "correctly loads all object locations" do
# 1 xref stream with 344 items (ignore the 17 free objects)
expect(subject.xref.keys.size).to eql(327)
end
it "loads type 1 objects references" do
expect(subject.xref[66][0]).to eql(298219)
end
it "loads type 2 objects references" do
expect(subject.xref[281][0]).to eql(PDF::Reader::Reference.new(341,0))
end
end
context "with cross_ref_stream.pdf" do
let!(:file) { File.new(pdf_spec_file("cross_ref_stream"))}
subject { PDF::Reader::XRef.new(file)}
it "raises an error when attempting to load an invalid xref stream" do
expect do
subject.send(:load_xref_stream, PDF::Reader::Stream.new({:Subject=>"\xFE\xFF"}, ""))
end.to raise_exception(PDF::Reader::MalformedPDFError)
end
end
context "with zeroed_xref_entry.pdf" do
let!(:file) { File.new(pdf_spec_file("zeroed_xref_entry"))}
subject { PDF::Reader::XRef.new(file)}
it "ignores non-free entries in the xref stream that point to offset 0" do
expect(subject.size).to eql(6)
expect(subject.xref.keys).not_to include(7)
end
end
context "with junk_prefix.pdf" do
it "loads all xrefs correctly from a File" do
File.open(pdf_spec_file("junk_prefix")) do |file|
tbl = PDF::Reader::XRef.new(file)
# 1 xref table with 6 items (ignore the first)
expect(tbl.xref.keys.size).to eql(6)
end
end
it "loads all xrefs with an offset to skip junk at the beginning of the file" do
File.open(pdf_spec_file("junk_prefix")) do |file|
tbl = PDF::Reader::XRef.new(file)
expect(tbl.xref[1][0]).to eq(36)
expect(tbl.xref[2][0]).to eq(130)
end
end
end
end
end
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