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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe PDF::Core::Reference do
it 'produces a PDF reference on #to_s call' do
ref = described_class.new(1, true)
expect(ref.to_s).to eq '1 0 R'
end
it 'allows changing generation number' do
ref = described_class.new(1, true)
ref.gen = 1
expect(ref.to_s).to eq '1 1 R'
end
it 'generates a valid PDF object for the referenced data' do
ref = described_class.new(2, [1, 'foo'])
expect(ref.object).to eq(
"2 0 obj\n#{PDF::Core.pdf_object([1, 'foo'])}\nendobj\n",
)
end
it 'includes stream fileds in dictionary when serializing' do
ref = described_class.new(1, {})
ref.stream << 'Hello'
expect(ref.object).to eq(
"1 0 obj\n<< /Length 5\n>>\nstream\nHello\nendstream\nendobj\n",
)
end
it 'appends data to stream when #<< is used' do
ref = described_class.new(1, {})
ref << "BT\n/F1 12 Tf\n72 712 Td\n( A stream ) Tj\nET"
expect(ref.object).to eq(
"1 0 obj\n<< /Length 41\n>>\nstream" \
"\nBT\n/F1 12 Tf\n72 712 Td\n( A stream ) Tj\nET" \
"\nendstream\nendobj\n",
)
end
it 'copies the data and stream from another ref on #replace' do
from = described_class.new(3, foo: 'bar')
from << 'has a stream too'
to = described_class.new(4, foo: 'baz')
to.replace(from)
# preserves identifier but copies data and stream
expect(to.identifier).to eq 4
expect(to.data).to eq from.data
expect(to.stream).to eq from.stream
end
it 'copies a compressed stream from a compressed ref on #replace' do
from = described_class.new(5, foo: 'bar')
from << ('has a stream too ' * 20)
from.stream.compress!
to = described_class.new(6, foo: 'baz')
to.replace(from)
expect(to.identifier).to eq 6
expect(to.data).to eq from.data
expect(to.stream).to eq from.stream
expect(to.stream.compressed?).to be true
end
end
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