Expected Behavior

• We test all cases, we want to be sure that we can deserialize the backtest failure cases correctly, format is right, errors are set etc

Actual Behavior

• Not there, only happy cases implemented

Potential Solution

• Add a new backtest api test which throws an exception on initialization
• Add a new backtest api test which throws an exception at ondata

Reproducing the Problem

N/A

System Information

N/A

Checklist

• I have completely filled out this template
• I have confirmed that this issue exists on the current master branch
• I have confirmed that this is not a duplicate issue by searching issues

• I have provided detailed steps to reproduce the issue