---
test case: Both interface and key parameter are present
in:
  interface: "127.0.0.1:10051"
  key: icmpping[127.0.0.1]
out:
  address: "127.0.0.1"
---
test case: Only interface is present
in:
  interface: "127.0.0.1:10051"
  key: icmpping[]
out:
  address: "127.0.0.1:10051"
---
test case: Only key parameter is present
in:
  interface: ""
  key: icmpping[127.0.0.1]
out:
  address: "127.0.0.1"
---
test case: Both interface and key parameter are missing
in:
  interface: ""
  key: icmpping[]
out:
  address: ""
...