From 59d99d7d67fbab6db877ab9a6441b003490edfaa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Hoguin?= <essen@ninenines.eu>
Date: Thu, 27 Feb 2020 13:02:28 +0100
Subject: Add a test getting preface errors in the 'DOWN' reason

---
 test/rfc7540_SUITE.erl | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/test/rfc7540_SUITE.erl b/test/rfc7540_SUITE.erl
index 047e4bb..43d2e52 100644
--- a/test/rfc7540_SUITE.erl
+++ b/test/rfc7540_SUITE.erl
@@ -126,6 +126,28 @@ prior_knowledge_preface_http1(_) ->
 		error(timeout)
 	end.
 
+prior_knowledge_preface_http1_await(_) ->
+	doc("A PROTOCOL_ERROR connection error must result from the server sending "
+		"an invalid preface in the form of an HTTP/1.1 response when connecting "
+		"using the prior knowledge method. (RFC7540 3.4, RFC7540 3.5)"),
+	%% We are going to do the handshake manually.
+	{ok, _, Port} = do_init_origin(tcp, http, fun(_, Socket, Transport) ->
+		timer:sleep(100),
+		ok = Transport:send(Socket, <<
+			"HTTP/1.1 400 Bad Request\r\n"
+			"Connection: close\r\n"
+			"Content-Length: 0\r\n"
+			"Date: Thu, 27 Feb 2020 09:32:17 GMT\r\n"
+			"\r\n">>),
+		timer:sleep(100)
+	end),
+	{ok, ConnPid} = gun:open("localhost", Port, #{protocols => [http2], retry => 0}),
+	{ok, http2} = gun:await_up(ConnPid),
+	{error, {shutdown, {error, {connection_error, protocol_error,
+		'Invalid connection preface received. (RFC7540 3.5)'}}}}
+		= gun:await(ConnPid, make_ref()),
+	gun:close(ConnPid).
+
 prior_knowledge_preface_other_frame(_) ->
 	doc("A PROTOCOL_ERROR connection error must result from the server sending "
 		"an invalid preface in the form of a non-SETTINGS frame when connecting "
-- 
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