Java Test Code: 24 more rules enabled by default

Sonar Updates
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Hello Java developers,

We’ve heard from you that you want your test code to be as high-quality as your main code. We previously enabled 40 rules in Java test code, and now we have selected and added 24 more rules relevant to test code!

The rules are:

  • S1612 - Lambdas should be replaced with method references
  • S1640 - Maps with keys that are enum values should use the EnumMap implementation
  • S1643 - Strings should not be concatenated using ‘+’ in a loop
  • S1656 - Variables should not be self-assigned
  • S1710 - Annotation repetitions should not be wrapped
  • S1751 - Loops with at most one iteration should be refactored
  • S1849 - Iterator.hasNext() should not call “Iterator.next()”
  • S1858 - toString() should never be called on a String object
  • S1862 - Related “if/else if” statements should not have the same condition
  • S1871 - Two branches in a conditional structure should not have exactly the same implementation
  • S1872 - Classes should not be compared by name
  • S1940 - Boolean checks should not be inverted
  • S1994 - for loop increment clauses should modify the loops’ counters
  • S2093 - Try-with-resources should be used
  • S2130 - Parsing should be used to convert “Strings” to primitives
  • S2133 - Objects should not be created only to invoke “getClass”
  • S2140 - Methods of “Random” that return floating point values should not be used in random integer generation
  • S2147 - Catches should be combined
  • S2153 - Unnecessary boxing and unboxing should be avoided
  • S2154 - Dissimilar primitive wrappers should not be used with the ternary operator without explicit casting
  • S2168 - Double-checked locking should not be used
  • S2178 - Short-circuit logic should be used in boolean contexts
  • S2183 - Ints and longs should not be shifted by zero or more than their number of bits-1
  • S2185 - Do not perform unnecessary mathematical operations

If you’d like to have this for other languages, please indicate which language in our portal here.

Let us know what you think.

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