added a second test to preserve the \r\n formatting for line endings

tests/app/s3_client/test_s3_csv_client.py

@@ -1,6 +1,6 @@
 from unittest.mock import Mock
 
-from app.s3_client.s3_csv_client import set_metadata_on_csv_upload
+from app.s3_client.s3_csv_client import remove_blank_lines, set_metadata_on_csv_upload
 
 
 def test_sets_metadata(client_request, mocker):
@@ -21,3 +21,9 @@ def test_sets_metadata(client_request, mocker):
         MetadataDirective="REPLACE",
         ServerSideEncryption="AES256",
     )
+
+
+def test_removes_blank_lines():
+    filedata = { "data": "variable,phone number\r\ntest,+15555555555\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n" }
+    file_data = remove_blank_lines(filedata)
+    assert file_data == {"data": "variable,phone number\r\ntest,+15555555555"}