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require File.expand_path('../helper', __FILE__)
class StreamingTest < Minitest::Test
Stream = Sinatra::Helpers::Stream
it 'returns the concatenated 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 { |_| 10.times { step += 1 }}
stream.callback { final = step }
stream.each {|_|}
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) { |_| 10.times { step += 1 } }
stream.callback { final = step }
stream.each {|_|}
assert_equal 0, final
end
it 'allows adding more than one callback' do
a = b = false
stream = Stream.new { }
stream.callback { a = true }
stream.callback { b = true }
stream.each {|_| }
assert a, 'should trigger first callback'
assert b, 'should trigger second callback'
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_raises(RuntimeError) { scheduler.schedule! }
end
it 'does not trigger an infinite loop if you call close in a callback' do
stream = Stream.new { |out| out.callback { out.close }}
stream.each { |_| }
end
it 'gives access to route specific params' do
mock_app do
get('/:name') do
stream { |o| o << params[:name] }
end
end
get '/foo'
assert_body 'foo'
end
it 'sets up async.close if available' do
ran = false
mock_app do
get('/') do
close = Object.new
def close.callback; yield end
def close.errback; end
env['async.close'] = close
stream(:keep_open) do |out|
out.callback { ran = true }
end
end
end
get '/'
assert ran
end
it 'has a public interface to inspect its open/closed state' do
stream = Stream.new(Stream) { |out| out << :foo }
assert !stream.closed?
stream.close
assert stream.closed?
end
end