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require 'spec_helper'
describe Prawn::Repeater do
it 'creates a stamp and increments Prawn::Repeater.count on initialize' do
orig_count = described_class.count
doc = sample_document
allow(doc).to receive(:create_stamp).with("prawn_repeater(#{orig_count})")
repeater(doc, :all) { :do_nothing }
expect(doc).to have_received(:create_stamp)
.with("prawn_repeater(#{orig_count})")
expect(described_class.count).to eq(orig_count + 1)
end
it 'must provide an :all filter' do
doc = sample_document
r = repeater(doc, :all) { :do_nothing }
expect((1..doc.page_count).all? { |i| r.match?(i) }).to eq true
end
it 'must provide an :odd filter' do
doc = sample_document
r = repeater(doc, :odd) { :do_nothing }
odd, even = (1..doc.page_count).partition(&:odd?)
expect(odd.all? { |i| r.match?(i) }).to eq true
expect(even.any? { |i| r.match?(i) }).to eq false
end
it 'must be able to filter by an array of page numbers' do
doc = sample_document
r = repeater(doc, [1, 2, 7]) { :do_nothing }
expect((1..10).select { |i| r.match?(i) }).to eq([1, 2, 7])
end
it 'must be able to filter by a range of page numbers' do
doc = sample_document
r = repeater(doc, 2..4) { :do_nothing }
expect((1..10).select { |i| r.match?(i) }).to eq([2, 3, 4])
end
it 'must be able to filter by an arbitrary proc' do
doc = sample_document
r = repeater(doc, ->(x) { x == 1 || x % 3 == 0 })
expect((1..10).select { |i| r.match?(i) }).to eq([1, 3, 6, 9])
end
it 'must try to run a stamp if the page number matches' do
doc = sample_document
allow(doc).to receive(:stamp)
repeater(doc, :odd).run(3)
expect(doc).to have_received(:stamp)
end
it 'must not try to run a stamp unless the page number matches' do
doc = sample_document
allow(doc).to receive(:stamp)
repeater(doc, :odd).run(2)
expect(doc).to_not have_received(:stamp)
end
it 'must not try to run a stamp if dynamic is selected' do
doc = sample_document
allow(doc).to receive(:stamp)
(1..10).each { |p| repeater(doc, :all, true) { :do_nothing }.run(p) }
expect(doc).to_not have_received(:stamp)
end
it 'must try to run a block if the page number matches' do
doc = sample_document
allow(doc).to receive(:draw_text)
(1..10).each do |p|
repeater(doc, [1, 2], true) { doc.draw_text 'foo' }.run(p)
end
expect(doc).to have_received(:draw_text).twice
end
it 'must not try to run a block unless the page number matches' do
doc = sample_document
allow(doc).to receive(:draw_text)
repeater(doc, :odd, true) { doc.draw_text 'foo' }.run(2)
expect(doc).to_not have_received(:draw_text)
end
it 'must treat any block as a closure' do
doc = sample_document
page = 'Page' # ensure access to ivars
doc.repeat(:all, dynamic: true) do
doc.draw_text "#{page} #{doc.page_number}", at: [500, 0]
end
text = PDF::Inspector::Text.analyze(doc.render)
expect(text.strings).to eq((1..10).to_a.map { |p| "Page #{p}" })
end
it 'must treat any block as a closure (Document.new instance_eval form)' do
doc = Prawn::Document.new(skip_page_creation: true) do
10.times { start_new_page }
page = 'Page'
repeat(:all, dynamic: true) do
# ensure self is accessible here
draw_text "#{page} #{page_number}", at: [500, 0]
end
end
text = PDF::Inspector::Text.analyze(doc.render)
expect(text.strings).to eq((1..10).to_a.map { |p| "Page #{p}" })
end
def sample_document
doc = Prawn::Document.new(skip_page_creation: true)
10.times { |_e| doc.start_new_page }
doc
end
def repeater(*args, &b)
Prawn::Repeater.new(*args, &b)
end
context 'graphic state' do
let(:pdf) { create_pdf }
it 'does not alter the graphic state stack color space' do
starting_color_space = pdf.state.page.graphic_state.color_space.dup
pdf.repeat :all do
pdf.text 'Testing', size: 24, style: :bold
end
expect(pdf.state.page.graphic_state.color_space)
.to eq(starting_color_space)
end
context 'dynamic repeaters' do
it 'preserves the graphic state at creation time' do
pdf.repeat :all, dynamic: true do
pdf.text "fill_color: #{pdf.graphic_state.fill_color}"
pdf.text "cap_style: #{pdf.graphic_state.cap_style}"
end
pdf.fill_color '666666'
pdf.cap_style :round
text = PDF::Inspector::Text.analyze(pdf.render)
expect(text.strings.include?('fill_color: 666666')).to eq(false)
expect(text.strings.include?('fill_color: 000000')).to eq(true)
expect(text.strings.include?('cap_style: round')).to eq(false)
expect(text.strings.include?('cap_style: butt')).to eq(true)
end
end
end
end
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