Explanation of test override syntax

I cannot find any information on the ? > syntax used in these test override configurations:

Nor can I about the | syntax used in this example:

Can anyone point me to it or provide me with an explanation of this configuration?


Everything on those lines is Bash commands stored within YAML. So, for the two points you made, they are YAML syntax that you can find out more about here: https://learnxinyminutes.com/docs/yaml/