influxdb/src/query: Send uints as influxdb unsigned integers (u suffix instead of i) (#113)

Author: mcronce

Diff for: influxdb/src/query/line_proto_term.rs

@@ -43,7 +43,7 @@ impl LineProtoTerm<'_> {
             .to_string(),
             Float(v) => v.to_string(),
             SignedInteger(v) => format!("{}i", v),
-            UnsignedInteger(v) => format!("{}i", v),
+            UnsignedInteger(v) => format!("{}u", v),
             Text(v) => format!(r#""{}""#, Self::escape_any(v, &*QUOTES_SLASHES)),
         }
     }

Diff for: influxdb/src/query/write_query.rs

@@ -264,12 +264,13 @@ mod tests {
             .into_query("weather".to_string())
             .add_field("temperature", 82)
             .add_field("wind_strength", 3.7)
+            .add_field("temperature_unsigned", 82u64)
             .build();
 
         assert!(query.is_ok(), "Query was empty");
         assert_eq!(
             query.unwrap(),
-            "weather temperature=82i,wind_strength=3.7 11"
+            "weather temperature=82i,wind_strength=3.7,temperature_unsigned=82u 11"
         );
     }
 
@@ -282,7 +283,7 @@ mod tests {
             .build();
 
         assert!(query.is_ok(), "Query was empty");
-        assert_eq!(query.unwrap(), "weather temperature=82i 11");
+        assert_eq!(query.unwrap(), "weather temperature=82u 11");
     }
 
     #[test]