[BUG] 走時表の計算バグ修正 (#691)

* fix

app/lib/core/provider/travel_time/provider/travel_time_provider.dart

@@ -15,13 +15,9 @@ Future<TravelTimeTables> travelTime(TravelTimeRef ref) async {
 @Riverpod(keepAlive: true)
 Future<TravelTimeDepthMap> travelTimeDepthMap(
   TravelTimeDepthMapRef ref,
-) {
-  final state = ref.watch(travelTimeProvider);
-  final value = state.value;
-  if (value == null) {
-    return Future.value({});
-  }
-  return Future.value(value.table.groupListsBy((e) => e.depth));
+) async {
+  final state = await ref.watch(travelTimeProvider.future);
+  return state.table.groupListsBy((e) => e.depth);
 }
 
 typedef TravelTimeDepthMap = Map<int, List<TravelTimeTable>>;
@@ -36,8 +32,8 @@ extension TravelTimeDepthMapCalc on TravelTimeDepthMap {
       return TravelTimeResult(null, null);
     }
     final p = () {
-      final p1 = lists.firstWhereOrNull((e) => e.p <= duration);
-      final p2 = lists.lastWhereOrNull((e) => e.p >= duration);
+      final p1 = lists.lastWhereOrNull((e) => e.p <= duration);
+      final p2 = lists.firstWhereOrNull((e) => e.p >= duration);
       if (p1 == null || p2 == null) {
         return null;
       }
@@ -47,8 +43,8 @@ extension TravelTimeDepthMapCalc on TravelTimeDepthMap {
       return p;
     }();
     final s = () {
-      final s1 = lists.firstWhereOrNull((e) => e.s <= duration);
-      final s2 = lists.lastWhereOrNull((e) => e.s >= duration);
+      final s1 = lists.lastWhereOrNull((e) => e.s <= duration);
+      final s2 = lists.firstWhereOrNull((e) => e.s >= duration);
       if (s1 == null || s2 == null) {
         return null;
       }

app/test/core/provider/travel_time/provider/travel_time_provider_test.dart

@@ -0,0 +1,65 @@
+import 'package:eqmonitor/core/provider/travel_time/provider/travel_time_provider.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+  final container = ProviderContainer();
+
+  // Wait for loading
+  setUp(() async {
+    await container.read(travelTimeDepthMapProvider.future);
+  });
+
+  test('travelTimeDepthMap', () {
+    final travelTimeDepthMap = container.read(travelTimeDepthMapProvider);
+    expect(travelTimeDepthMap, isNotNull);
+  });
+
+  group(
+    'TravelTimeDepthMapCalc',
+    () {
+      // https://zenn.dev/boocsan/articles/travel-time-table-converter-adcal2020?#%E5%8B%95%E4%BD%9C%E7%A2%BA%E8%AA%8D より
+      test(
+        '20km 20sec',
+        () async {
+          final travelMap =
+              await container.read(travelTimeDepthMapProvider.future);
+          final result = travelMap.getTravelTime(20, 20);
+          expect(result.pDistance, 122.35900962861072);
+          expect(result.sDistance, 67.68853695324285);
+        },
+      );
+      test(
+        '100km 200sec',
+        () async {
+          final travelMap =
+              await container.read(travelTimeDepthMapProvider.future);
+          final result = travelMap.getTravelTime(100, 200);
+          expect(result.pDistance, 1603.2552083333333);
+          expect(result.sDistance, 868.2417083144026);
+        },
+      );
+      test(
+        '200km 200sec',
+        () async {
+          final travelMap =
+              await container.read(travelTimeDepthMapProvider.future);
+          final result = travelMap.getTravelTime(200, 200);
+          expect(result.pDistance, 1639.8745519713261);
+          expect(result.sDistance, 874.7576045627376);
+        },
+      );
+      test(
+        '300km 200sec',
+        () async {
+          final travelMap =
+              await container.read(travelTimeDepthMapProvider.future);
+          final result = travelMap.getTravelTime(300, 200);
+          expect(result.pDistance, 1672.7323943661972);
+          expect(result.sDistance, 869.2659627953747);
+        },
+      );
+    },
+  );
+}