fix: do not shift pings on 'publish' packets (#1866)

* fix: do not shift pings on 'publish' packets

Fixes #1863 #1861

* fix: tests

src/lib/handlers/index.ts

@@ -26,7 +26,7 @@ const handle: PacketHandler = (client, packet, done) => {
 	client.pingResp = Date.now()
 
 	// do not shift on pingresp otherwise we would skip the pingreq sending
-	if (packet.cmd !== 'pingresp') {
+	if (!['pingresp', 'publish'].includes(packet.cmd)) {
 		client['_shiftPingInterval']()
 	}
 

test/abstract_client.ts

@@ -2004,19 +2004,48 @@ export default function abstractTest(server, config, ports) {
 
 		it('should not shift ping on publish', function _test(t, done) {
 			const intervalMs = 3000
+
 			const client = connect({ keepalive: intervalMs / 1000 })
 
-			const spy = sinon.spy()
-			client['_checkPing'] = spy
+			const spy = sinon.spy(client, '_reschedulePing' as any)
 
-			client.once('connect', () => {
-				client.publish('foo', 'bar')
-				clock.tick(intervalMs)
+			let serverClient
+
+			function fakePub() {
 				client.publish('foo', 'bar')
-				clock.tick(intervalMs)
+				serverClient.publish({
+					topic: 'foo',
+					payload: 'bar',
+				})
+				clock.tick(1)
+			}
 
-				assert.strictEqual(spy.callCount, 2)
-				client.end(true, done)
+			server.once('client', (_serverClient) => {
+				// send fake packet to client
+				serverClient = _serverClient
+
+				serverClient.on('publish', () => {
+					// needed to trigger the setImmediate inside server publish listener and send suback
+					clock.tick(1)
+				})
+			})
+
+			let received = 0
+
+			client.on('packetreceive', (packet) => {
+				if (packet.cmd === 'publish') {
+					clock.tick(intervalMs)
+					received++
+					assert.strictEqual(spy.callCount, 0)
+					if (received === 2) {
+						client.end(true, done)
+					}
+				}
+			})
+
+			client.once('connect', () => {
+				fakePub()
+				fakePub()
 			})
 		})