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require File.join(File.expand_path(File.dirname(__FILE__)), "spec_helper")
describe "Repeaters" do
it "creates a stamp and increments Prawn::Repeater.count on initialize" do
orig_count = Prawn::Repeater.count
doc = sample_document
doc.expects(:create_stamp).with("prawn_repeater(#{orig_count})")
r = repeater(doc, :all) { :do_nothing }
assert_equal orig_count + 1, Prawn::Repeater.count
end
it "must provide an :all filter" do
doc = sample_document
r = repeater(doc, :all) { :do_nothing }
assert (1..doc.page_count).all? { |i| r.match?(i) }
end
it "must provide an :odd filter" do
doc = sample_document
r = repeater(doc, :odd) { :do_nothing }
odd, even = (1..doc.page_count).partition { |e| e % 2 == 1 }
assert odd.all? { |i| r.match?(i) }
assert ! even.any? { |i| r.match?(i) }
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 }
assert_equal [1,2,7], (1..10).select { |i| r.match?(i) }
end
it "must be able to filter by a range of page numbers" do
doc = sample_document
r = repeater(doc, 2..4) { :do_nothing }
assert_equal [2,3,4], (1..10).select { |i| r.match?(i) }
end
it "must be able to filter by an arbitrary proc" do
doc = sample_document
r = repeater(doc, lambda { |x| x == 1 or x % 3 == 0 })
assert_equal [1,3,6,9], (1..10).select { |i| r.match?(i) }
end
it "must try to run a stamp if the page number matches" do
doc = sample_document
doc.expects(:stamp)
repeater(doc, :odd).run(3)
end
it "must not try to run a stamp unless the page number matches" do
doc = sample_document
doc.expects(:stamp).never
repeater(doc, :odd).run(2)
end
it "must not try to run a stamp if dynamic is selected" do
doc = sample_document
doc.expects(:stamp).never
(1..10).each { |p| repeater(doc, :all, true){:do_nothing}.run(p) }
end
it "must try to run a block if the page number matches" do
doc = sample_document
doc.expects(:draw_text).twice
(1..10).each { |p| repeater(doc, [1,2], true){doc.draw_text "foo"}.run(p) }
end
it "must not try to run a block unless the page number matches" do
doc = sample_document
doc.expects(:draw_text).never
repeater(doc, :odd, true){doc.draw_text "foo"}.run(2)
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)
assert_equal (1..10).to_a.map{|p| "Page #{p}"}, text.strings
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)
assert_equal (1..10).to_a.map{|p| "Page #{p}"}, text.strings
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
it "should not alter the graphic state stack color space" do
create_pdf
starting_color_space = @pdf.state.page.graphic_state.color_space.dup
@pdf.repeat :all do
@pdf.text "Testing", :size => 24, :style => :bold
end
@pdf.state.page.graphic_state.color_space.should == starting_color_space
end
context "dynamic repeaters" do
it "should preserve the graphic state at creation time" do
create_pdf
@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)
text.strings.include?("fill_color: 666666").should == false
text.strings.include?("fill_color: 000000").should == true
text.strings.include?("cap_style: round").should == false
text.strings.include?("cap_style: butt").should == true
end
end
end
end
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