rspec/rules/S131/abap/rule.adoc

The requirement for an ``OTHERS`` 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

----
CASE SY-INDEX.   // Noncompliant; missing WHEN OTHERS clause
  WHEN ONE.
    WRITE  'One'. 
  WHEN 2.
    WRITE   'Two'.
ENDCASE.
----

== Compliant Solution

----
CASE SY-INDEX. 
  WHEN ONE.
    WRITE  'One'. 
  WHEN 2.
    WRITE   'Two'.
  WHEN OTHERS. // Compliant
    WRITE 'Unexpected result'
ENDCASE.

CASE SY-INDEX.
  WHEN OTHERS.   // Compliant
    WRITE 'Unexpected result'
  WHEN ONE.
    WRITE  'One'. 
  WHEN 2.
    WRITE   'Two'.
ENDCASE.
----

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