Create integration_async_test for to be enable test with rainbows

test/integration_async_test.rb

@@ -0,0 +1,40 @@
+require File.expand_path('../helper', __FILE__)
+require File.expand_path('../integration_async_helper', __FILE__)
+
+# These tests are like integration_test, but they test asynchronous streaming.
+class IntegrationAsyncTest < Minitest::Test
+  extend IntegrationAsyncHelper
+  attr_accessor :server
+
+  it 'streams async' do
+    Timeout.timeout(3) do
+      chunks = []
+      server.get_stream '/async' do |chunk|
+        next if chunk.empty?
+        chunks << chunk
+        case chunk
+        when "hi!"   then server.get "/send?msg=hello"
+        when "hello" then server.get "/send?close=1"
+        end
+      end
+
+      assert_equal ['hi!', 'hello'], chunks
+    end
+  end
+
+  it 'streams async from subclass' do
+    Timeout.timeout(3) do
+      chunks = []
+      server.get_stream '/subclass/async' do |chunk|
+        next if chunk.empty?
+        chunks << chunk
+        case chunk
+        when "hi!"   then server.get "/subclass/send?msg=hello"
+        when "hello" then server.get "/subclass/send?close=1"
+        end
+      end
+
+      assert_equal ['hi!', 'hello'], chunks
+    end
+  end
+end