Skip to main content

avoid-constant-assert-conditions

v1.28.0
warning
pro+

Warns when an assert statement has a constant condition.

Constant conditions in assert statements always evaluate to true or false and usually indicate a typo or a bug.

Example​

❌ Bad:

void fn() {
  const value = 1;

  // LINT: This condition is constant and will always evaluate to true or false.
  //  Try changing this condition or removing the assert.
  assert(value > 1);

  // LINT: This condition is constant and will always evaluate to true or false.
  //  Try changing this condition or removing the assert.
  assert(true);
}

class SomeClass {
  static const first = 1;

  // LINT: This condition is constant and will always evaluate to true or false.
  //  Try changing this condition or removing the assert.
  const SomeClass() : assert(first > 1);
}

✅ Good:

void fn(int value) {
  assert(value > 1);
}

class SomeClass {
  final int first;

  const SomeClass(this.first) : assert(this.first > 1);
}
Last updated on