diff --git a/example/test_harness/.gitignore b/example/test_harness/.gitignore
new file mode 100644
index 000000000..3c3629e64
--- /dev/null
+++ b/example/test_harness/.gitignore
@@ -0,0 +1 @@
+node_modules
diff --git a/example/test_harness/package-lock.json b/example/test_harness/package-lock.json
new file mode 100644
index 000000000..d346ae642
--- /dev/null
+++ b/example/test_harness/package-lock.json
@@ -0,0 +1,388 @@
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+}
diff --git a/example/test_harness/package.json b/example/test_harness/package.json
new file mode 100644
index 000000000..3f6a6c27f
--- /dev/null
+++ b/example/test_harness/package.json
@@ -0,0 +1,9 @@
+{
+  "name": "ably_flutter_test_harness",
+  "scripts": {
+    "publish": "node publish.js"
+  },
+  "dependencies": {
+    "ably": "^1.2.1"
+  }
+}
diff --git a/example/test_harness/publish.js b/example/test_harness/publish.js
new file mode 100644
index 000000000..5aa84bbab
--- /dev/null
+++ b/example/test_harness/publish.js
@@ -0,0 +1,69 @@
+const Ably = require('ably');
+
+if(process.argv[2] && !process.argv[3]) throw new Error("Invalid number of args: pass either 0 or 2 args");
+
+const key = process.argv[2];
+const channelName = process.argv[3];
+const environment = 'sandbox';
+const logLevel = 2;
+
+var realtime = new Ably.Realtime({key, environment, logLevel});
+var channel = realtime.channels.get(channelName);
+
+async function publish(name, data){
+    return new Promise((resolve, reject)=>{
+        channel.publish(name, data,
+            function(err) {
+                if(err) {
+                    console.log('publish failed with error ' + err);
+                    reject();
+                } else {
+                    console.log(`published message "${data}" with name "${name}"`);
+                    resolve();
+                }
+            }
+        );
+    });
+}
+
+async function publishUndefined(){
+    await publish('message-undefined', undefined);
+}
+
+async function publishNull(){
+    await publish('message-null', null);
+}
+
+async function publishString(){
+    await publish('message-string', "Out of boredom! Need some more...");
+}
+
+async function publishObject(){
+    await publish(
+        'message-data',
+        {"I am": null, "and": {"also": "nested", "too": {"deep": true}}}
+    );
+}
+
+async function publishArray(){
+    await publish(
+        'message-data',
+        [42, {"are": "you"}, "crazy", false, {"I am": null, "and": {"also": "nested", "too": {"deep": true}}}]
+    );
+}
+
+async function delay(fn){
+    return new Promise(async (resolve, reject) => {
+        setTimeout(async () => {
+            resolve(await fn());
+        }, 2000);
+    });
+}
+
+publishUndefined()
+    .then(() => delay(publishNull))
+    .then(() => delay(publishString))
+    .then(() => delay(publishObject))
+    .then(() => delay(publishArray))
+    .then(process.exit)
+    .catch((e)=>console.log(e)||process.exit());