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# typed: false
# coding: utf-8
describe PDF::Reader::ObjectHash do
describe "mixins" do
it "has enumerable mixed in" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h.map { |ref, obj| obj.class }.size).to eql(57)
end
end
describe "initialisation" do
it "correctly loads a PDF from a StringIO object" do
filename = pdf_spec_file("cairo-unicode")
io = StringIO.new(binread(filename))
h = PDF::Reader::ObjectHash.new(io)
expect(h.map { |ref, obj| obj.class }.size).to eql(57)
end
it "correctly loads a PDF from a string containing a file path" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h.map { |ref, obj| obj.class }.size).to eql(57)
end
# This means PDF::Reader.open(URI.open("https://example.com/foo.pdf")) will work
it "correctly loads a PDF via a Tempfile object" do
filename = pdf_spec_file("cairo-unicode")
Tempfile.open('foo.pdf') do |tempfile|
tempfile.write binread(filename)
tempfile.rewind
h = PDF::Reader::ObjectHash.new(tempfile)
expect(h.map { |ref, obj| obj.class }.size).to eql(57)
end
end
it "raises an ArgumentError if passed a non filename and non IO" do
expect {PDF::Reader::ObjectHash.new(10)}.to raise_error(ArgumentError)
end
end
describe "#[]" do
it "returns nil for any invalid hash key" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h[-1]).to be_nil
expect(h[nil]).to be_nil
expect(h["James"]).to be_nil
end
it "returns nil for any hash key that doesn't exist" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h[10000]).to be_nil
end
it "correctly extracts an int object using int or string keys" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h[3]).to eql(3649)
expect(h["3"]).to eql(3649)
expect(h["3james"]).to eql(3649)
end
it "correctly extracts an int object using PDF::Reference as a key" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
ref = PDF::Reader::Reference.new(3,0)
expect(h[ref]).to eql(3649)
end
end
describe "#object" do
it "returns regular objects unchanged" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h.object(-1)).to eql(-1)
expect(h.object(nil)).to be_nil
expect(h.object("James")).to eql("James")
end
it "translates reference objects into an extracted PDF object" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h.object(PDF::Reader::Reference.new(3,0))).to eql(3649)
end
end
describe "#deref!" do
let(:hash) do
PDF::Reader::ObjectHash.new pdf_spec_file("cairo-unicode")
end
it "returns regular objects unchanged" do
expect(hash.deref!(-1)).to eql(-1)
expect(hash.deref!(nil)).to be_nil
expect(hash.deref!("James")).to eql("James")
end
it "translates reference objects into an extracted PDF object" do
expect(hash.deref!(PDF::Reader::Reference.new(3,0))).to eq 3649
end
it "recursively dereferences references within hashes" do
font_descriptor = hash.deref! PDF::Reader::Reference.new(17, 0)
expect(font_descriptor[:FontFile3]).to be_an_instance_of \
PDF::Reader::Stream
end
it "recursively dereferences references within stream hashes" do
font_file = hash.deref! PDF::Reader::Reference.new(15, 0)
expect(font_file.hash[:Length]).to eq 2103
end
it "recursively dereferences references within arrays" do
font = hash.deref! PDF::Reader::Reference.new(19, 0)
expect(font[:DescendantFonts][0][:Subtype]).to eq :CIDFontType0
end
it "returns a new Hash, not mutate the provided Hash" do
orig_collection = {}
new_collection = hash.deref!(orig_collection)
expect(orig_collection.object_id).not_to eq(new_collection.object_id)
end
it "returns a new Array, not mutate the provided Array" do
orig_collection = []
new_collection = hash.deref!(orig_collection)
expect(orig_collection.object_id).not_to eq(new_collection.object_id)
end
# a -> b -> c -> a
context "with nested Array's that reference themselves" do
let(:a) { [1, b] }
let(:b) { [2, c] }
let(:c) { [3] }
before do
c << a
end
it "returns a new Array, not mutate the provided Array" do
result = hash.deref!(c)
expect(result).to be_a(Array)
end
end
end
describe "#fetch" do
it "raises IndexError for any invalid hash key when no default is provided" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect { h.fetch(-1) }.to raise_error(IndexError)
expect { h.fetch(nil) }.to raise_error(IndexError)
expect { h.fetch("James") }.to raise_error(IndexError)
end
it "returns default for any hash key that doesn't exist when a default is provided" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h.fetch(10000, "default")).to eql("default")
end
it "correctly extracts an int object using int or string keys" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h.fetch(3)).to eql(3649)
expect(h.fetch("3")).to eql(3649)
expect(h.fetch("3james")).to eql(3649)
end
it "correctly extracts an int object using PDF::Reader::Reference keys" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
ref = PDF::Reader::Reference.new(3,0)
expect(h.fetch(ref)).to eql(3649)
end
end
describe "#each" do
it "iterates 57 times when using cairo-unicode PDF" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
count = 0
h.each do
count += 1
end
expect(count).to eql(57)
end
it "provides a PDF::Reader::Reference to each iteration" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
h.each do |id, obj|
expect(id).to be_a_kind_of(PDF::Reader::Reference)
expect(obj).not_to be_nil
end
end
end
describe "#each_key" do
it "iterates 57 times when using cairo-unicode PDF" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
count = 0
h.each_key do
count += 1
end
expect(count).to eql(57)
end
it "provides a PDF::Reader::Reference to each iteration" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
h.each_key do |ref|
expect(ref).to be_a_kind_of(PDF::Reader::Reference)
end
end
end
describe "#each_value" do
it "iterates 57 times when using cairo-unicode PDF" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
count = 0
h.each_value do
count += 1
end
expect(count).to eql(57)
end
end
describe "#size" do
it "returns 57 when using cairo-unicode PDF" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h.size).to eql(57)
end
end
describe "#empty?" do
it "returns false when using cairo-unicode PDF" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h.empty?).to be_falsey
end
end
describe "#has_key?" do
it "returns true when called with a valid ID" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h.has_key?(1)).to be_truthy
expect(h.has_key?(PDF::Reader::Reference.new(1,0))).to be_truthy
end
it "returns false when called with an invalid ID" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h.has_key?(-1)).to be_falsey
expect(h.has_key?(nil)).to be_falsey
expect(h.has_key?("James")).to be_falsey
expect(h.has_key?(PDF::Reader::Reference.new(10000,0))).to be_falsey
end
end
describe "#has_value?" do
it "returns true when called with a valid object" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h.has_value?(3649)).to be_truthy
end
it "returns false when called with an invalid object" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h.has_value?(-1)).to be_falsey
expect(h.has_value?(nil)).to be_falsey
expect(h.has_value?("James")).to be_falsey
end
end
describe "#keys" do
it "returns an array of keys" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
keys = h.keys
expect(keys.size).to eql(57)
keys.each { |k| expect(k).to be_a_kind_of(PDF::Reader::Reference) }
end
end
describe "#values" do
it "returns an array of object" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
values = h.values
expect(values.size).to eql(57)
values.each { |v| expect(v).not_to be_nil }
end
end
describe "#values_at" do
it "returns an array of object" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
ref3 = PDF::Reader::Reference.new(3,0)
ref6 = PDF::Reader::Reference.new(6,0)
expect(h.values_at(3,6)).to eql([3649,3287])
expect(h.values_at(ref3,ref6)).to eql([3649,3287])
end
end
describe "#to_a" do
it "returns an array of 57 arrays" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
arr = h.to_a
expect(arr.size).to eql(57)
arr.each { |a| expect(a).to be_a_kind_of(Array) }
end
end
describe "#trailer" do
it "returns the document trailer dictionary" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h.trailer[:Size]).to eql(58)
expect(h.trailer[:Root]).to eql(PDF::Reader::Reference.new(57,0))
expect(h.trailer[:Info]).to eql(PDF::Reader::Reference.new(56,0))
end
end
describe "#pdf_version" do
it "returns the document PDF version dictionary" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h.pdf_version).to eql(1.4)
end
end
describe "#page_references" do
it "returns an Array of PDF::Reader::Reference objs" do
filename = pdf_spec_file("cairo-unicode")
h = PDF::Reader::ObjectHash.new(filename)
expect(h.page_references).to be_a(Array)
h.page_references.each do |ref|
expect(ref).to be_a(PDF::Reader::Reference)
end
end
it "raises a MalformedPDFError if dereferenced value is not a dict" do
filename = pdf_spec_file("page_reference_is_not_a_dict")
h = PDF::Reader::ObjectHash.new(filename)
expect { h.page_references }.to raise_error(PDF::Reader::MalformedPDFError)
end
end
end
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