add memory.grow oosm test

Author: Robbepop

crates/core/src/memory/buffer.rs

@@ -267,4 +267,22 @@ mod test {
         let mut buffer = ByteBuffer::new_static(buf, 5).unwrap();
         assert!(buffer.grow(10).is_err());
     }
+
+    #[test]
+    fn out_of_memory_works() {
+        let mut buffer = ByteBuffer::new(0).unwrap();
+        assert!(matches!(
+            buffer.grow(usize::MAX).unwrap_err(),
+            MemoryError::OutOfSystemMemory
+        ));
+        assert_eq!(buffer.len(), 0);
+        assert_eq!(buffer.data().get(0), None);
+        assert!(buffer.grow(1).is_ok());
+        assert!(matches!(
+            buffer.grow(usize::MAX).unwrap_err(),
+            MemoryError::OutOfSystemMemory
+        ));
+        assert_eq!(buffer.len(), 1);
+        assert_eq!(buffer.data().get(0), Some(&0x00_u8));
+    }
 }