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require 'abstract_unit'
require 'active_support/concurrency/latch'
Thread.abort_on_exception = true
module ActionController
class SSETest < ActionController::TestCase
class SSETestController < ActionController::Base
include ActionController::Live
def basic_sse
response.headers['Content-Type'] = 'text/event-stream'
sse = SSE.new(response.stream)
sse.write("{\"name\":\"John\"}")
sse.write({ name: "Ryan" })
ensure
sse.close
end
def sse_with_event
sse = SSE.new(response.stream, event: "send-name")
sse.write("{\"name\":\"John\"}")
sse.write({ name: "Ryan" })
ensure
sse.close
end
def sse_with_retry
sse = SSE.new(response.stream, retry: 1000)
sse.write("{\"name\":\"John\"}")
sse.write({ name: "Ryan" }, retry: 1500)
ensure
sse.close
end
def sse_with_id
sse = SSE.new(response.stream)
sse.write("{\"name\":\"John\"}", id: 1)
sse.write({ name: "Ryan" }, id: 2)
ensure
sse.close
end
end
tests SSETestController
def wait_for_response_stream_close
response.stream.await_close
end
def test_basic_sse
get :basic_sse
wait_for_response_stream_close
assert_match(/data: {\"name\":\"John\"}/, response.body)
assert_match(/data: {\"name\":\"Ryan\"}/, response.body)
end
def test_sse_with_event_name
get :sse_with_event
wait_for_response_stream_close
assert_match(/data: {\"name\":\"John\"}/, response.body)
assert_match(/data: {\"name\":\"Ryan\"}/, response.body)
assert_match(/event: send-name/, response.body)
end
def test_sse_with_retry
get :sse_with_retry
wait_for_response_stream_close
first_response, second_response = response.body.split("\n\n")
assert_match(/data: {\"name\":\"John\"}/, first_response)
assert_match(/retry: 1000/, first_response)
assert_match(/data: {\"name\":\"Ryan\"}/, second_response)
assert_match(/retry: 1500/, second_response)
end
def test_sse_with_id
get :sse_with_id
wait_for_response_stream_close
first_response, second_response = response.body.split("\n\n")
assert_match(/data: {\"name\":\"John\"}/, first_response)
assert_match(/id: 1/, first_response)
assert_match(/data: {\"name\":\"Ryan\"}/, second_response)
assert_match(/id: 2/, second_response)
end
end
class LiveStreamTest < ActionController::TestCase
class Exception < StandardError
end
class TestController < ActionController::Base
include ActionController::Live
attr_accessor :latch, :tc
def self.controller_path
'test'
end
def render_text
render :text => 'zomg'
end
def default_header
response.stream.write "<html><body>hi</body></html>"
response.stream.close
end
def basic_stream
response.headers['Content-Type'] = 'text/event-stream'
%w{ hello world }.each do |word|
response.stream.write word
end
response.stream.close
end
def blocking_stream
response.headers['Content-Type'] = 'text/event-stream'
%w{ hello world }.each do |word|
response.stream.write word
latch.await
end
response.stream.close
end
def thread_locals
tc.assert_equal 'aaron', Thread.current[:setting]
tc.assert_not_equal Thread.current.object_id, Thread.current[:originating_thread]
response.headers['Content-Type'] = 'text/event-stream'
%w{ hello world }.each do |word|
response.stream.write word
end
response.stream.close
end
def with_stale
render :text => 'stale' if stale?(:etag => "123")
end
def exception_in_view
render 'doesntexist'
end
def exception_with_callback
response.headers['Content-Type'] = 'text/event-stream'
response.stream.on_error do
response.stream.write %(data: "500 Internal Server Error"\n\n)
response.stream.close
end
response.stream.write "" # make sure the response is committed
raise 'An exception occurred...'
end
def exception_in_controller
raise Exception, 'Exception in controller'
end
def bad_request_error
raise ActionController::BadRequest
end
def exception_in_exception_callback
response.headers['Content-Type'] = 'text/event-stream'
response.stream.on_error do
raise 'We need to go deeper.'
end
response.stream.write ''
response.stream.write params[:widget][:didnt_check_for_nil]
end
end
tests TestController
def assert_stream_closed
assert response.stream.closed?, 'stream should be closed'
end
def capture_log_output
output = StringIO.new
old_logger, ActionController::Base.logger = ActionController::Base.logger, ActiveSupport::Logger.new(output)
begin
yield output
ensure
ActionController::Base.logger = old_logger
end
end
def test_set_response!
@controller.set_response!(@request)
assert_kind_of(Live::Response, @controller.response)
assert_equal @request, @controller.response.request
end
def test_write_to_stream
@controller = TestController.new
get :basic_stream
assert_equal "helloworld", @response.body
assert_equal 'text/event-stream', @response.headers['Content-Type']
end
def test_async_stream
@controller.latch = ActiveSupport::Concurrency::Latch.new
parts = ['hello', 'world']
@controller.request = @request
@controller.response = @response
t = Thread.new(@response) { |resp|
resp.stream.each do |part|
assert_equal parts.shift, part
ol = @controller.latch
@controller.latch = ActiveSupport::Concurrency::Latch.new
ol.release
end
}
@controller.process :blocking_stream
assert t.join(3), 'timeout expired before the thread terminated'
end
def test_thread_locals_get_copied
@controller.tc = self
Thread.current[:originating_thread] = Thread.current.object_id
Thread.current[:setting] = 'aaron'
get :thread_locals
end
def test_live_stream_default_header
@controller.request = @request
@controller.response = @response
@controller.process :default_header
_, headers, _ = @response.prepare!
assert headers['Content-Type']
end
def test_render_text
get :render_text
assert_equal 'zomg', response.body
assert_stream_closed
end
def test_exception_handling_html
assert_raises(ActionView::MissingTemplate) do
get :exception_in_view
end
assert_stream_closed
end
def test_exception_handling_plain_text
assert_raises(ActionView::MissingTemplate) do
get :exception_in_view, format: :json
end
end
def test_exception_callback_when_committed
capture_log_output do |output|
get :exception_with_callback, format: 'text/event-stream'
assert_equal %(data: "500 Internal Server Error"\n\n), response.body
assert_match 'An exception occurred...', output.rewind && output.read
assert_stream_closed
end
end
def test_exception_in_controller_before_streaming
assert_raises(ActionController::LiveStreamTest::Exception) do
get :exception_in_controller, format: 'text/event-stream'
end
end
def test_bad_request_in_controller_before_streaming
assert_raises(ActionController::BadRequest) do
get :bad_request_error, format: 'text/event-stream'
end
end
def test_exceptions_raised_handling_exceptions_and_committed
capture_log_output do |output|
get :exception_in_exception_callback, format: 'text/event-stream'
assert_equal '', response.body
assert_match 'We need to go deeper', output.rewind && output.read
assert_stream_closed
end
end
def test_stale_without_etag
get :with_stale
assert_equal 200, @response.status.to_i
end
def test_stale_with_etag
@request.if_none_match = Digest::MD5.hexdigest("123")
get :with_stale
assert_equal 304, @response.status.to_i
end
end
class BufferTest < ActionController::TestCase
def test_nil_callback
buf = ActionController::Live::Buffer.new nil
assert buf.call_on_error
end
end
end
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