I believe it is referring to "End to End Integration Testing.
• is a collection of applications communicating with each other
• is a collection of applications with shared
• is a collection of applications acting as one
• consists of processes using applications
Success is the ability to go from one failure to another with no loss of enthusiasm.
~ Winston Churchill ~
I asked that in another forum and got the next answer:
"You could see chain testing as: Are the relations underneath working? All aspects that are connected or that are dependent to each other.
So to speak": system1 <--> system2 <--> system3.
So underlying interfaces between those systems, but also the order of events. A kind of combination of process & state diagram testing!"