From 8d68ae39c17147b67d63c4a7bd82dfa1cd527c6c Mon Sep 17 00:00:00 2001
From: Andrew Morgan <andrew@amorgan.xyz>
Date: Tue, 15 Sep 2020 14:12:39 +0100
Subject: [PATCH 1/2] Add bash script to run complement against the local
 synapse checkout

---
 scripts-dev/complement.sh | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100755 scripts-dev/complement.sh

diff --git a/scripts-dev/complement.sh b/scripts-dev/complement.sh
new file mode 100755
index 000000000000..3cde53f5c051
--- /dev/null
+++ b/scripts-dev/complement.sh
@@ -0,0 +1,22 @@
+#! /bin/bash -eu
+# This script is designed for developers who want to test their code
+# against Complement.
+#
+# It makes a Synapse image which represents the current checkout,
+# then downloads Complement and runs it with that image.
+
+cd "$(dirname $0)/.."
+
+# Build the base Synapse image from the local checkout
+docker build -t matrixdotorg/synapse:latest -f docker/Dockerfile .
+
+# Download Complement
+wget -N https://github.com/matrix-org/complement/archive/master.tar.gz
+tar -xzf master.tar.gz
+cd complement-master
+
+# Build the Synapse image from Complement, based on the above image we just built
+docker build -t complement-synapse -f dockerfiles/Synapse.Dockerfile ./dockerfiles
+
+# Run the tests on the resulting image!
+COMPLEMENT_BASE_IMAGE=complement-synapse go test -v -count=1 ./tests

From d4f4a3a335c90055f15f92342bdd32a02840d303 Mon Sep 17 00:00:00 2001
From: Andrew Morgan <andrew@amorgan.xyz>
Date: Tue, 15 Sep 2020 14:18:16 +0100
Subject: [PATCH 2/2] Changelog

---
 changelog.d/8317.feature | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 changelog.d/8317.feature

diff --git a/changelog.d/8317.feature b/changelog.d/8317.feature
new file mode 100644
index 000000000000..f9edda099c40
--- /dev/null
+++ b/changelog.d/8317.feature
@@ -0,0 +1 @@
+Support testing the local Synapse checkout against the [Complement homeserver test suite](https://github.com/matrix-org/complement/).
\ No newline at end of file