fix: Filter receiver blocks before starting block (#863)

As we fetch blocks for a given day, there is possibility for that day to
include blocks lesser than the provided `start_block_height`. This PR
ensures that those blocks are filtered out.

block-streamer/src/receiver_blocks/receiver_blocks_processor.rs

@@ -187,7 +187,9 @@ impl ReceiverBlocksProcessor {
                 }
 
                 for block_height in bitmap_for_day.iter() {
-                    yield block_height;
+                    if block_height >= start_block_height {
+                        yield block_height;
+                    }
                 }
             }
         }
@@ -199,7 +201,7 @@ mod tests {
     use super::*;
     use mockall::predicate;
 
-    use futures::StreamExt;
+    use futures::TryStreamExt;
 
     fn exact_query_result(
         first_block_height: i64,
@@ -314,14 +316,43 @@ mod tests {
         let stream =
             reciever_blocks_processor.stream_matching_block_heights(0, "someone.near".to_owned());
 
-        tokio::pin!(stream);
+        assert_eq!(stream.try_collect::<Vec<u64>>().await.unwrap(), vec![1]);
+    }
 
-        let mut result_heights = vec![];
-        while let Some(Ok(height)) = stream.next().await {
-            result_heights.push(height);
-        }
+    #[tokio::test]
+    async fn filters_blocks_before_start_block() {
+        let mut mock_s3_client = crate::s3_client::S3Client::default();
+        mock_s3_client
+            .expect_get_text_file()
+            .returning(move |_, _| {
+                Ok(crate::test_utils::generate_block_with_timestamp(
+                    &Utc::now().format("%Y-%m-%d").to_string(),
+                ))
+            });
+
+        let mut mock_graphql_client = crate::graphql::client::GraphQLClient::default();
+        mock_graphql_client
+            .expect_get_bitmaps_exact()
+            .with(
+                predicate::eq(vec!["someone.near".to_string()]),
+                predicate::function(|date: &DateTime<Utc>| {
+                    date.date_naive() == Utc::now().date_naive()
+                }),
+            )
+            .times(1)
+            // DecompressedBitmap: 0b11110000
+            .returning(move |_, _| Ok(vec![exact_query_result(1, "kA==")]));
+
+        let reciever_blocks_processor =
+            ReceiverBlocksProcessor::new(mock_graphql_client, mock_s3_client);
 
-        assert_eq!(result_heights, vec![1]);
+        let stream =
+            reciever_blocks_processor.stream_matching_block_heights(2, "someone.near".to_owned());
+
+        assert_eq!(
+            stream.try_collect::<Vec<u64>>().await.unwrap(),
+            vec![2, 3, 4]
+        );
     }
 
     #[tokio::test]
@@ -388,11 +419,10 @@ mod tests {
 
         let stream = reciever_blocks_processor
             .stream_matching_block_heights(0, "*.someone.near".to_string());
-        tokio::pin!(stream);
-        let mut result_heights = vec![];
-        while let Some(Ok(height)) = stream.next().await {
-            result_heights.push(height);
-        }
-        assert_eq!(result_heights, vec![1, 5, 10, 15, 100, 105]);
+
+        assert_eq!(
+            stream.try_collect::<Vec<u64>>().await.unwrap(),
+            vec![1, 5, 10, 15, 100, 105]
+        );
     }
 }