test_types_in_equals
Test type of argument in operator ==(Object other)
.
This rule is available as of Dart 2.0.
Details
#DO test type of argument in operator ==(Object other)
.
Not testing the type might result in runtime type errors which will be unexpected for consumers of your class.
BAD:
dart
class Field {
}
class Bad {
final Field someField;
Bad(this.someField);
@override
bool operator ==(Object other) {
Bad otherBad = other as Bad; // LINT
bool areEqual = otherBad != null && otherBad.someField == someField;
return areEqual;
}
@override
int get hashCode {
return someField.hashCode;
}
}
GOOD:
dart
class Field {
}
class Good {
final Field someField;
Good(this.someField);
@override
bool operator ==(Object other) {
if (identical(this, other)) {
return true;
}
return other is Good &&
this.someField == other.someField;
}
@override
int get hashCode {
return someField.hashCode;
}
}
Usage
#To enable the test_types_in_equals
rule, add test_types_in_equals
under linter > rules in your analysis_options.yaml
file:
analysis_options.yaml
yaml
linter:
rules:
- test_types_in_equals
Unless stated otherwise, the documentation on this site reflects Dart 3.5.3. Page last updated on 2024-07-03. View source or report an issue.