1 files changed, 47 insertions, 0 deletions
diff --git a/mqtt-tester/src/behaviour/invalid_utf8_is_rejected.rs b/mqtt-tester/src/behaviour/invalid_utf8_is_rejected.rs
new file mode 100644
index 0000000..eea0fa5
--- /dev/null
+++ b/mqtt-tester/src/behaviour/invalid_utf8_is_rejected.rs
@@ -0,0 +1,47 @@
+//
+//   This Source Code Form is subject to the terms of the Mozilla Public
+//   License, v. 2.0. If a copy of the MPL was not distributed with this
+//   file, You can obtain one at http://mozilla.org/MPL/2.0/.
+//
+
+use mqtt_format::v3::{connect_return::MConnectReturnCode, packet::MConnack};
+
+use crate::{
+    behaviour_test::BehaviourTest,
+    command::{Input, Output},
+    executable::ClientExecutableCommand,
+};
+
+pub struct InvalidUtf8IsRejected;
+
+#[async_trait::async_trait]
+impl BehaviourTest for InvalidUtf8IsRejected {
+    fn commands(&self) -> Vec<Box<dyn ClientExecutableCommand>> {
+        vec![]
+    }
+
+    async fn execute(&self, mut input: Input, _output: Output) -> Result<(), miette::Error> {
+        input
+            .send_packet(MConnack {
+                session_present: false,
+                connect_return_code: MConnectReturnCode::Accepted,
+            })
+            .await?;
+
+        input
+            .send(&[
+                0b0011_0000, // PUBLISH packet, DUP = 0, QoS = 0, Retain = 0
+                0b0000_0111, // Length
+                // Now the variable header
+                0b0000_0000,
+                0b0000_0010,
+                0x61,
+                0xC1,        // An invalid UTF-8 byte
+                0b0000_0000, // Packet identifier
+                0b0000_0001,
+                0x1, // Payload
+            ])
+            .await?;
+        Ok(())
+    }
+}