From 5a175dc6d5c0beddb78900b2d4ad817c9be7c2df Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Hoguin?= <essen@ninenines.eu>
Date: Tue, 8 Mar 2022 15:24:23 +0100
Subject: Add a test for HTTP/2 empty DATA frame with fin set

---
 test/gun_SUITE.erl | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/test/gun_SUITE.erl b/test/gun_SUITE.erl
index ad39317..00b8eab 100644
--- a/test/gun_SUITE.erl
+++ b/test/gun_SUITE.erl
@@ -143,6 +143,29 @@ ignore_empty_data_http2(_) ->
 	>> = Data,
 	gun:close(Pid).
 
+ignore_empty_data_fin_http2(_) ->
+	doc("When gun:data/4 is called with fin and empty data, it must send a final empty DATA frame."),
+	{ok, OriginPid, OriginPort} = init_origin(tcp, http2),
+	{ok, Pid} = gun:open("localhost", OriginPort, #{protocols => [http2]}),
+	{ok, http2} = gun:await_up(Pid),
+	handshake_completed = receive_from(OriginPid),
+	Ref = gun:put(Pid, "/", []),
+	gun:data(Pid, Ref, nofin, "hello "),
+	gun:data(Pid, Ref, nofin, "world!"),
+	gun:data(Pid, Ref, fin, ["", <<>>]),
+	Data = receive_all_from(OriginPid, 500),
+	<<
+		%% HEADERS frame.
+		Len1:24, 1, _:40, _:Len1/unit:8,
+		%% First DATA frame.
+		6:24, 0, _:7, 0:1, _:32, "hello ",
+		%% Second DATA frame.
+		6:24, 0, _:7, 0:1, _:32, "world!",
+		%% Final empty DATA frame.
+		0:24, 0, _:7, 1:1, _:32
+	>> = Data,
+	gun:close(Pid).
+
 info(_) ->
 	doc("Get info from the Gun connection."),
 	{ok, ListenSocket} = gen_tcp:listen(0, [binary, {active, false}]),
-- 
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