Boolean method is always inverted

Reports methods with a boolean return type that are always negated when called.

A quick-fix is provided to invert and optionally rename the method. For performance reasons, not all problematic methods may be highlighted in the editor.

Example:

class C {
  boolean alwaysTrue() {
    return true;
  }

  void f() {
    if (!alwaysTrue()) {
      return;
    }
  }
  boolean member = !alwaysTrue();
}

After the quick-fix is applied:

class C {
  boolean alwaysFalse() {
    return false;
  }

  void f() {
    if (alwaysFalse()) {
      return;
    }
  }
  boolean member = alwaysFalse();
}

Inspection Details
Available in:	IntelliJ IDEA 2023.3, Qodana for JVM 2023.3
Plugin:	Java, 233.SNAPSHOT

Last modified: 13 July 2023