---
test case: Hostname and fqdn can be fetched
in:
  hostname: "hostname"
  gethostname: "hostname2"
  fqdn: "fqdn_string1"
out:
  result: "fqdn_string1"
  return: "SUCCEED"
---
test case: Hostname cannot be fetched, fqdn can be fetched
in:
  hostname: "hostname"
  gethostname: ""
  fqdn: "fqdn_string2"
out:
  result: "fqdn_string2"
  return: "SUCCEED"
---
test case: Hostname can be fetched, fqdn cannot be fetched
in:
  hostname: "hostname"
  gethostname: "hostname2"
  fqdn: ""
out:
  result: "hostname2"
  return: "SUCCEED"
---
test case: Hostname and fqdn cannot be fetched
in:
  hostname: "hostname"
  gethostname: ""
  fqdn: ""
out:
  result: "hostname"
  return: "SUCCEED"
...