Final test fix

Author: Matthew Shapiro

opentelemetry-sdk/src/metrics/internal/sum.rs

@@ -154,7 +154,10 @@ impl<T: Number<T>> Sum<T> {
             *start = t;
         }
 
-        (n, new_agg.map(|a| Box::new(a) as Box<_>))
+        (
+            s_data.data_points.len(),
+            new_agg.map(|a| Box::new(a) as Box<_>),
+        )
     }
 
     pub(crate) fn cumulative(
@@ -220,7 +223,10 @@ impl<T: Number<T>> Sum<T> {
             });
         }
 
-        (n, new_agg.map(|a| Box::new(a) as Box<_>))
+        (
+            s_data.data_points.len(),
+            new_agg.map(|a| Box::new(a) as Box<_>),
+        )
     }
 }
 
@@ -322,7 +328,10 @@ impl<T: Number<T>> PrecomputedSum<T> {
         *reported = new_reported;
         drop(reported); // drop before values guard is dropped
 
-        (n, new_agg.map(|a| Box::new(a) as Box<_>))
+        (
+            s_data.data_points.len(),
+            new_agg.map(|a| Box::new(a) as Box<_>),
+        )
     }
 
     pub(crate) fn cumulative(
@@ -396,6 +405,9 @@ impl<T: Number<T>> PrecomputedSum<T> {
         *reported = new_reported;
         drop(reported); // drop before values guard is dropped
 
-        (n, new_agg.map(|a| Box::new(a) as Box<_>))
+        (
+            s_data.data_points.len(),
+            new_agg.map(|a| Box::new(a) as Box<_>),
+        )
     }
 }

opentelemetry-sdk/src/metrics/mod.rs

@@ -578,10 +578,16 @@ mod tests {
         test_context.flush_metrics();
         let _ = test_context.get_aggregation::<data::Sum<u64>>("my_counter", "my_unit");
 
+        counter.add(50, &[KeyValue::new("a", "b")]);
         test_context.flush_metrics();
         let sum = test_context.get_aggregation::<data::Sum<u64>>("my_counter", "my_unit");
 
-        assert_eq!(sum.data_points.len(), 0, "Expected only one data point");
+        let no_attr_data_point = sum.data_points.iter().find(|x| x.attributes.is_empty());
+
+        assert!(
+            no_attr_data_point.is_none(),
+            "Expected no data points with no attributes"
+        );
     }
 
     struct TestContext {