fix(plc4go/connection-pool): Tried hardening a flaky test

plc4go/internal/plc4go/utils/pool/PlcConnectionPool_test.go

@@ -528,23 +528,32 @@ func TestPlcConnectionPool_SecondConnectionGivenUpWaiting(t1 *testing.T) {
 	}
 
 	// Wait for 20ms to have the connection pool timeout (10ms) the lease as nobody's listening.
-	time.Sleep(time.Millisecond * 20)
+	time.Sleep(time.Millisecond * 50)
 
 	// This should be quite equal to the serial case as the connections are requested serially.
 	assert.NotNil(t1, pool.GetTracer(), "Tracer should be available")
 	traces := pool.GetTracer().GetTraces()
-	assert.Equal(t1, 6, len(traces), "Unexpected number of trace entries")
-	// First is needs to create a new container for this connection
-	assert.Equal(t1, "create new pooled connection", traces[0].Message, "Unexpected message")
-	// Then it gets a lease for the connection
-	assert.Equal(t1, "lease", traces[1].Message, "Unexpected message")
-	// And a second time
-	assert.Equal(t1, "lease", traces[2].Message, "Unexpected message")
-	// Now the delay of 100ms is over, and we should see the first success
-	assert.Equal(t1, "success", traces[3].Message, "Unexpected message")
-	// Now the first operation is finished, and we should see the second success
-	assert.Equal(t1, "success", traces[4].Message, "Unexpected message")
-	assert.Equal(t1, "client given up", traces[5].Message, "Unexpected message")
+	if assert.Equal(t1, 6, len(traces), "Unexpected number of trace entries") {
+		// First is needs to create a new container for this connection
+		assert.Equal(t1, "create new pooled connection", traces[0].Message, "Unexpected message")
+		// Then it gets a lease for the connection
+		assert.Equal(t1, "lease", traces[1].Message, "Unexpected message")
+		// And a second time
+		assert.Equal(t1, "lease", traces[2].Message, "Unexpected message")
+		// Now the delay of 100ms is over, and we should see the first success
+		assert.Equal(t1, "success", traces[3].Message, "Unexpected message")
+		// Now the first operation is finished, and we should see the second success
+		assert.Equal(t1, "success", traces[4].Message, "Unexpected message")
+		assert.Equal(t1, "client given up", traces[5].Message, "Unexpected message")
+	} else if len(traces) > 0 {
+		var values string
+		for _, traceEntry := range traces {
+			values = values + traceEntry.Operation + "-" + traceEntry.Message + ", "
+		}
+		t1.Errorf("Got traces: %s", values)
+	} else {
+		t1.Error("No traces")
+	}
 }
 
 func TestPlcConnectionPool_MaximumWaitTimeReached(t1 *testing.T) {