ignore different streaming behavior between ubuntu and osx in integration test

test/integration_test.rb

@@ -20,12 +20,13 @@ class IntegrationTest < Test::Unit::TestCase
 
   it 'streams' do
     next if server.name == "webrick"
-    times, chunks = [], []
+    times, chunks = [Time.now], []
     server.get_stream do |chunk|
+      next if chunk.empty?
       chunks << chunk
       times << Time.now
     end
-    assert_equal ["", "a", "b"], chunks
+    assert_equal ["a", "b"], chunks
     assert times[1] - times[0] < 1
     assert times[2] - times[1] > 1
   end