rspec/rules/S131/apex/rule.adoc

The requirement for a final ``++when else++`` clause is defensive programming. The clause should either take appropriate action, or contain a suitable comment as to why no action is taken.

== Noncompliant Code Example

----
switch on i { // missing 'when else'
  when 2 {
    System.debug('when block 2');
  }
  when -3 {
    System.debug('when block -3');
  }
}
----

== Compliant Solution

----
switch on i { 
  when 2 {
    System.debug('when block 2');
  }
  when -3 {
    System.debug('when block -3');
  }
  when else {
    System.debug('default');
  }
}
----

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