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require File.expand_path('../helper', __FILE__)
class StreamingTest < Test::Unit::TestCase
Stream = Sinatra::Helpers::Stream
it 'returns the concatinated body' do
mock_app do
get '/' do
stream do |out|
out << "Hello" << " "
out << "World!"
end
end
end
get('/')
assert_body "Hello World!"
end
it 'always yields strings' do
stream = Stream.new { |out| out << :foo }
stream.each { |str| assert_equal 'foo', str }
end
it 'postpones body generation' do
step = 0
stream = Stream.new do |out|
10.times do
out << step
step += 1
end
end
stream.each do |s|
assert_equal s, step.to_s
step += 1
end
end
it 'calls the callback after it is done' do
step = 0
final = 0
stream = Stream.new { |o| 10.times { step += 1 }}
stream.callback { final = step }
stream.each { |str| }
assert_equal 10, final
end
it 'does not trigger the callback if close is set to :keep_open' do
step = 0
final = 0
stream = Stream.new(Stream, :keep_open) { |o| 10.times { step += 1 } }
stream.callback { final = step }
stream.each { |str| }
assert_equal 0, final
end
class MockScheduler
def initialize(*) @schedule, @defer = [], [] end
def schedule(&block) @schedule << block end
def defer(&block) @defer << block end
def schedule!(*) @schedule.pop.call until @schedule.empty? end
def defer!(*) @defer.pop.call until @defer.empty? end
end
it 'allows dropping in another scheduler' do
scheduler = MockScheduler.new
processing = sending = done = false
stream = Stream.new(scheduler) do |out|
processing = true
out << :foo
end
stream.each { sending = true}
stream.callback { done = true }
scheduler.schedule!
assert !processing
assert !sending
assert !done
scheduler.defer!
assert processing
assert !sending
assert !done
scheduler.schedule!
assert sending
assert done
end
it 'schedules exceptions to be raised on the main thread/event loop/...' do
scheduler = MockScheduler.new
Stream.new(scheduler) { fail 'should be caught' }.each { }
scheduler.defer!
assert_raise(RuntimeError) { scheduler.schedule! }
end
end
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