You can find more information about testing and monitoring Azure Functions by going to the following links:
- Software Testing Fundamentals - Unit Testing: http://softwaretestingfundamentals.com/unit-testing/
- Get started with unit testing: https://docs.microsoft.com/en-us/visualstudio/test/getting-started-with-unit-testing?view=vs-2019
- Azure Monitor Documentation: https://docs.microsoft.com/en-us/azure/azure-monitor/#5-minute-quickstarts
- Monitor Azure Functions: https://docs.microsoft.com/en-us/azure/azure-functions/functions-monitoring