chore: incorrect cursor end example

rumqttd/src/segments/mod.rs

@@ -378,13 +378,17 @@ mod tests {
 
         // Read one by one
         let mut out = Vec::new();
+        let mut last_read_cursor = (0, 0);
         for i in 0..10 {
             let offset = i as u64;
             let next = log.readv((0, offset), 1, &mut out).unwrap();
             let data = out.pop().unwrap();
             verify(i, packet_size, data);
 
             if i == 9 {
+                if let Done { start: _, end } = next {
+                    last_read_cursor = end;
+                };
                 assert_eq!(
                     next,
                     Done {
@@ -404,6 +408,11 @@ mod tests {
             );
         }
 
+        log.append(random_payload(10, packet_size));
+        log.readv(last_read_cursor, 1, &mut out).unwrap();
+        let data = out.pop().unwrap();
+        verify(10, packet_size, data);
+
         // Read in bulk 1. Trying to read less than appended
         let mut out = Vec::new();
         let next = log.readv((0, 0), 5, &mut out).unwrap();