fix: preserve seeded location identities

apps/api/src/database/seeds/vertical-slice.seed.spec.ts

@@ -1,4 +1,7 @@
 import { DataSource } from 'typeorm';
+import { Character } from '../../characters/entities/character.entity';
+import { LocationConnection } from '../../world/entities/location-connection.entity';
+import { LocationDefinition } from '../../world/entities/location-definition.entity';
 import { seedVisibleVerticalSlice } from './vertical-slice.seed';
 
 type Row = Record<string, unknown>;
@@ -39,6 +42,41 @@ class InMemoryRepository {
   readonly insert = jest.fn(async (value: Row) => {
     this.rows.push({ ...value });
   });
+  readonly update = jest.fn(async (criteria: string | Row, value: Row) => {
+    const row = this.rows.find((candidate) =>
+      typeof criteria === 'string'
+        ? candidate.id === criteria
+        : Object.entries(criteria).every(
+            ([key, expected]) => candidate[key] === expected,
+          ),
+    );
+
+    if (row) {
+      Object.assign(row, value);
+    }
+  });
+}
+
+function createDataSource(
+  locationRepository: InMemoryRepository,
+  connectionRepository: InMemoryRepository,
+  characterRepository: InMemoryRepository,
+): DataSource {
+  return {
+    getRepository: jest.fn((entity: unknown) => {
+      if (entity === LocationDefinition) {
+        return locationRepository;
+      }
+      if (entity === LocationConnection) {
+        return connectionRepository;
+      }
+      if (entity === Character) {
+        return characterRepository;
+      }
+
+      throw new Error('Unexpected repository');
+    }),
+  } as unknown as DataSource;
 }
 
 describe('seedVisibleVerticalSlice', () => {
@@ -46,27 +84,20 @@ describe('seedVisibleVerticalSlice', () => {
     const locationRepository = new InMemoryRepository();
     const connectionRepository = new InMemoryRepository();
     const characterRepository = new InMemoryRepository();
-    const dataSource = {
-      getRepository: jest
-        .fn()
-        .mockReturnValueOnce(locationRepository)
-        .mockReturnValueOnce(connectionRepository)
-        .mockReturnValueOnce(characterRepository)
-        .mockReturnValueOnce(locationRepository)
-        .mockReturnValueOnce(connectionRepository)
-        .mockReturnValueOnce(characterRepository),
-    } as unknown as DataSource;
-
-    await seedVisibleVerticalSlice(dataSource);
-    await seedVisibleVerticalSlice(dataSource);
-
-    expect(locationRepository.upsert).toHaveBeenCalledWith(
-      expect.arrayContaining([
-        expect.objectContaining({ id: SOUTH_GATE_ID, key: 'south-gate' }),
-        expect.objectContaining({ id: BURNED_ROAD_ID, key: 'burned-road' }),
-      ]),
-      ['key'],
+    const dataSource = createDataSource(
+      locationRepository,
+      connectionRepository,
+      characterRepository,
     );
+
+    await seedVisibleVerticalSlice(dataSource);
+    Object.assign(characterRepository.rows[0], {
+      currentLocationId: BURNED_ROAD_ID,
+      currentHp: 57,
+      experience: 39,
+    });
+    await seedVisibleVerticalSlice(dataSource);
+
     expect(connectionRepository.upsert).toHaveBeenCalledWith(
       expect.arrayContaining([
         expect.objectContaining({
@@ -86,5 +117,57 @@ describe('seedVisibleVerticalSlice', () => {
     expect(locationRepository.rows).toHaveLength(2);
     expect(connectionRepository.rows).toHaveLength(2);
     expect(characterRepository.rows).toHaveLength(1);
+    expect(characterRepository.rows[0]).toEqual(
+      expect.objectContaining({
+        currentLocationId: BURNED_ROAD_ID,
+        currentHp: 57,
+        experience: 39,
+      }),
+    );
+  });
+
+  it('preserves existing location IDs and uses them for the directed connections', async () => {
+    const locationRepository = new InMemoryRepository();
+    const connectionRepository = new InMemoryRepository();
+    const characterRepository = new InMemoryRepository();
+    const persistedSouthGateId = '30000000-0000-4000-8000-000000000001';
+    locationRepository.rows.push({
+      id: persistedSouthGateId,
+      key: 'south-gate',
+      name: 'Veraltetes Südtor',
+    });
+    const dataSource = createDataSource(
+      locationRepository,
+      connectionRepository,
+      characterRepository,
+    );
+
+    await seedVisibleVerticalSlice(dataSource);
+
+    expect(locationRepository.rows).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          id: persistedSouthGateId,
+          key: 'south-gate',
+          name: 'Südtor von Graufurt',
+        }),
+        expect.objectContaining({
+          id: BURNED_ROAD_ID,
+          key: 'burned-road',
+        }),
+      ]),
+    );
+    expect(connectionRepository.rows).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          fromLocationId: persistedSouthGateId,
+          toLocationId: BURNED_ROAD_ID,
+        }),
+        expect.objectContaining({
+          fromLocationId: BURNED_ROAD_ID,
+          toLocationId: persistedSouthGateId,
+        }),
+      ]),
+    );
   });
 });