refactor: leaderboard state initial method

lib/leaderboard/bloc/leaderboard_bloc.dart

@@ -15,7 +15,7 @@ part 'leaderboard_state.dart';
 class LeaderboardBloc extends Bloc<LeaderboardEvent, LeaderboardState> {
   /// {@macro leaderboard_bloc}
   LeaderboardBloc(this._leaderboardRepository)
-      : super(const LeaderboardState()) {
+      : super(const LeaderboardState.initial()) {
     on<Top10Fetched>(_onTop10Fetched);
     on<LeaderboardEntryAdded>(_onLeaderboardEntryAdded);
   }

lib/leaderboard/bloc/leaderboard_state.dart

@@ -20,14 +20,19 @@ enum LeaderboardStatus {
 class LeaderboardState extends Equatable {
   /// {@macro leaderboard_state}
   const LeaderboardState({
-    this.status = LeaderboardStatus.loading,
-    this.ranking = const LeaderboardRanking(
-      ranking: 0,
-      outOf: 0,
-    ),
-    this.leaderboard = const [],
+    required this.status,
+    required this.ranking,
+    required this.leaderboard,
   });
 
+  const LeaderboardState.initial()
+      : status = LeaderboardStatus.loading,
+        ranking = const LeaderboardRanking(
+          ranking: 0,
+          outOf: 0,
+        ),
+        leaderboard = const [];
+
   /// The current [LeaderboardStatus] of the state.
   final LeaderboardStatus status;
 

test/leaderboard/bloc/leaderboard_bloc_test.dart

@@ -26,7 +26,7 @@ void main() {
     });
 
     group('Top10Fetched', () {
-      final top10Scores = [
+      const top10Scores = [
         2500,
         2200,
         2200,
@@ -61,7 +61,7 @@ void main() {
         build: () => LeaderboardBloc(leaderboardRepository),
         act: (bloc) => bloc.add(Top10Fetched()),
         expect: () => [
-          const LeaderboardState(),
+          LeaderboardState.initial(),
           isA<LeaderboardState>()
             ..having(
               (element) => element.status,
@@ -90,8 +90,8 @@ void main() {
         build: () => LeaderboardBloc(leaderboardRepository),
         act: (bloc) => bloc.add(Top10Fetched()),
         expect: () => <LeaderboardState>[
-          const LeaderboardState(),
-          const LeaderboardState(status: LeaderboardStatus.error),
+          LeaderboardState.initial(),
+          LeaderboardState.initial().copyWith(status: LeaderboardStatus.error),
         ],
         verify: (_) =>
             verify(() => leaderboardRepository.fetchTop10Leaderboard())
@@ -122,7 +122,7 @@ void main() {
         build: () => LeaderboardBloc(leaderboardRepository),
         act: (bloc) => bloc.add(LeaderboardEntryAdded(entry: leaderboardEntry)),
         expect: () => [
-          const LeaderboardState(),
+          LeaderboardState.initial(),
           isA<LeaderboardState>()
             ..having(
               (element) => element.status,
@@ -153,8 +153,8 @@ void main() {
         build: () => LeaderboardBloc(leaderboardRepository),
         act: (bloc) => bloc.add(LeaderboardEntryAdded(entry: leaderboardEntry)),
         expect: () => <LeaderboardState>[
-          const LeaderboardState(),
-          const LeaderboardState(status: LeaderboardStatus.error),
+          LeaderboardState.initial(),
+          LeaderboardState.initial().copyWith(status: LeaderboardStatus.error),
         ],
         verify: (_) => verify(
           () => leaderboardRepository.addLeaderboardEntry(leaderboardEntry),

test/leaderboard/bloc/leaderboard_state_test.dart

@@ -8,9 +8,9 @@ void main() {
   group('LeaderboardState', () {
     test('supports value equality', () {
       expect(
-        LeaderboardState(),
+        LeaderboardState.initial(),
         equals(
-          LeaderboardState(),
+          LeaderboardState.initial(),
         ),
       );
     });
@@ -18,7 +18,7 @@ void main() {
     group('constructor', () {
       test('can be instantiated', () {
         expect(
-          LeaderboardState(),
+          LeaderboardState.initial(),
           isNotNull,
         );
       });
@@ -35,7 +35,7 @@ void main() {
         'copies correctly '
         'when no argument specified',
         () {
-          const leaderboardState = LeaderboardState();
+          const leaderboardState = LeaderboardState.initial();
           expect(
             leaderboardState.copyWith(),
             equals(leaderboardState),
@@ -47,7 +47,7 @@ void main() {
         'copies correctly '
         'when all arguments specified',
         () {
-          const leaderboardState = LeaderboardState();
+          const leaderboardState = LeaderboardState.initial();
           final otherLeaderboardState = LeaderboardState(
             status: LeaderboardStatus.success,
             ranking: LeaderboardRanking(ranking: 0, outOf: 0),