server_connection: fix ServerConnection#window_update

1 files changed, 12 insertions, 0 deletions

diff --git a/test/plum/test_server_connection_helper.rb b/test/plum/test_server_connection_helper.rb
index b54f3b0..27578f2 100644
--- a/test/plum/test_server_connection_helper.rb
+++ b/test/plum/test_server_connection_helper.rb
@@ -3,4 +3,16 @@ require "test_helper"
 using BinaryString
 
 class ServerConnectionHelperTest < Minitest::Test
+  def test_server_window_update
+    open_server_connection {|con|
+      before_ws = con.recv_remaining_window
+      con.window_update(500)
+
+      last = sent_frames.last
+      assert_equal(:window_update, last.type)
+      assert_equal(500, last.payload.uint32)
+      assert_equal(before_ws + 500, con.recv_remaining_window)
+    }
+  end
+
 end