eqeq.yaml

rules:
  - id: eqeq
    patterns:
      - pattern-not-inside: assert $X;
      - pattern-not-inside: |
          assert $X : $Y;
      - pattern-either:
          - pattern: $X == $X
          - pattern: $X != $X
      - pattern-not: 1 == 1
    message: >-
      `$X == $X` or `$X != $X` is always true. (Unless the value compared is a float
      or double).
      To test if `$X` is not-a-number, use `Double.isNaN($X)`.
    languages: [java]
    severity: ERROR
    metadata:
      category: correctness
      technology:
        - java