Add decode test of message not starting with a tag

Author: pennam

extras/test/src/test_command_decode.cpp

@@ -685,4 +685,28 @@ SCENARIO("Test the decoding of command messages") {
     }
   }
 
+  /****************************************************************************/
+
+  WHEN("Decode a message not starting with a CBOR tag")
+  {
+    CommandDown command;
+
+    /*
+        82              # array(2)
+            1A 65DCB821 # unsigned(1708963873)
+            1A 78ACA191 # unsigned(2024579473)
+    */
+
+    uint8_t const payload[] = {0x82, 0x1A, 0x65, 0xDC, 0xB8, 0x21, 0x1A, 0x78,
+                               0xAC, 0xA1, 0x91};
+
+    size_t payload_length = sizeof(payload) / sizeof(uint8_t);
+    CBORMessageDecoder decoder;
+    Decoder::Status err =  decoder.decode((Message*)&command, payload, payload_length);
+
+    THEN("The decode is unsuccessful") {
+      REQUIRE(err == Decoder::Status::Error);
+    }
+  }
+
 }