Add basic test for eclipse-mosquitto.

test/config.sh

@@ -63,6 +63,9 @@ imageTests+=(
 	'
 	[django]='
 	'
+	[eclipse-mosquitto]='
+		eclipse-mosquitto-basics
+	'
 	[elasticsearch]='
 		elasticsearch-basics
 	'

test/tests/eclipse-mosquitto-basics/run.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+set -eo pipefail
+
+# Test basic mosquitto broker and clients operation.
+#
+# 1. Run the broker. 
+# 2. Use mosquitto_pub to publish a retained message with a random payload to a
+#    random topic
+# 3. Use mosquitto_sub to subscribe to the random topic, and retrieve the
+#    payload.
+# 
+# mosquitto_sub times out after two seconds if the message is not delivered.
+
+dir="$(dirname "$(readlink -f "$BASH_SOURCE")")"
+
+image="$1"
+
+cname="eclipse-mosquitto-container-$RANDOM-$RANDOM"
+cid="$(docker run -d \
+	--name "$cname" \
+	"$image"
+)"
+trap "docker rm -vf $cid > /dev/null" EXIT
+
+_publish() {
+	local topic="${1}"
+	shift
+
+	local payload="${1}"
+	shift
+
+	docker run --rm \
+		--link "$cname":eclipse-mosquitto \
+		"$image" \
+		mosquitto_pub \
+			-t $topic \
+			-m ${payload} \
+			-r \
+			-h eclipse-mosquitto
+}
+
+_subscribe() {
+	local topic="${1}"
+	shift
+
+	docker run --rm \
+		--link "$cname":eclipse-mosquitto \
+		"$image" \
+		mosquitto_sub \
+			-t $topic \
+			-C 1 \
+			-W 2 \
+			-h eclipse-mosquitto
+}
+
+topic="topic-$RANDOM"
+payload="$RANDOM"
+
+. "$dir/../../retry.sh" --tries 20 "_publish $topic $payload"
+
+response="$(_subscribe $topic)"
+[[ "$response" == "$payload" ]]