fix: update filesystem-service tests to use FileService test override

Replace direct Tauri invoke mocks with FileService.setTestInvokeOverride method
for more reliable test execution. This ensures the FileService internal
tauriInvoke function uses the test mock properly.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: Y-RyuZU

src/lib/services/__tests__/filesystem-service.jest.test.ts

@@ -1,10 +1,54 @@
 import { FileService } from '../file-service';
 
 describe('FileService - FTB Quest File Discovery', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+    // Set up the test invoke override for FileService
+    FileService.setTestInvokeOverride((command: string, args: any) => {
+      if (command === 'get_ftb_quest_files') {
+        const dir = args?.dir || '';
+        return Promise.resolve([
+          `${dir}/ftb/quests/chapter1.snbt`,
+          `${dir}/ftb/quests/chapter2.snbt`,
+          `${dir}/ftb/quests/chapter3.snbt`,
+        ]);
+      }
+      if (command === 'get_better_quest_files') {
+        return Promise.resolve([
+          `${args?.dir}/betterquests/DefaultQuests.json`,
+          `${args?.dir}/betterquests/QuestLines.json`,
+        ]);
+      }
+      if (command === 'get_files_with_extension') {
+        if (args?.extension === '.json') {
+          return Promise.resolve([
+            `${args?.dir}/example1.json`,
+            `${args?.dir}/example2.json`,
+            `${args?.dir}/subfolder/example3.json`,
+          ]);
+        } else if (args?.extension === '.snbt') {
+          return Promise.resolve([
+            `${args?.dir}/example1.snbt`,
+            `${args?.dir}/example2.snbt`,
+          ]);
+        }
+      }
+      if (command === 'read_text_file') {
+        return Promise.resolve(`Mock content for ${args?.path}`);
+      }
+      return Promise.resolve(null);
+    });
+  });
+
+  afterEach(() => {
+    // Reset the test invoke override
+    FileService.setTestInvokeOverride(null);
+  });
+
   describe('get_ftb_quest_files functionality', () => {
     it('should return SNBT files using built-in mock', async () => {
-      // FileService has a built-in mock that returns SNBT files for get_ftb_quest_files
-      const result = await FileService.invoke('get_ftb_quest_files', { dir: '/test/modpack' });
+      // Use the FileService method
+      const result = await FileService.getFTBQuestFiles('/test/modpack');
 
       // The built-in mock returns SNBT files with the pattern: dir/ftb/quests/chapterX.snbt
       expect(result).toEqual([
@@ -14,15 +58,15 @@ describe('FileService - FTB Quest File Discovery', () => {
       ]);
 
       // Verify SNBT files are returned
-      (result as string[]).forEach(file => {
+      result.forEach(file => {
         expect(file).toMatch(/\.snbt$/);
         expect(file).toMatch(/ftb\/quests/);
       });
     });
 
     it('should handle different directory paths correctly', async () => {
       // Test with different directory path
-      const result = await FileService.invoke('get_ftb_quest_files', { dir: '/different/path' });
+      const result = await FileService.getFTBQuestFiles('/different/path');
 
       // The built-in mock adapts to the directory provided
       expect(result).toEqual([
@@ -32,14 +76,14 @@ describe('FileService - FTB Quest File Discovery', () => {
       ]);
 
       // Verify SNBT files are returned
-      (result as string[]).forEach(file => {
+      result.forEach(file => {
         expect(file).toMatch(/\.snbt$/);
         expect(file).toMatch(/\/different\/path\/ftb\/quests/);
       });
     });
 
     it('should work with empty directory path', async () => {
-      const result = await FileService.invoke('get_ftb_quest_files', { dir: '' });
+      const result = await FileService.getFTBQuestFiles('');
 
       expect(result).toEqual([
         '/ftb/quests/chapter1.snbt',
@@ -74,7 +118,7 @@ describe('FileService - FTB Quest File Discovery', () => {
 
   describe('other file operations', () => {
     it('should handle get_better_quest_files', async () => {
-      const result = await FileService.invoke('get_better_quest_files', { dir: '/test/modpack' });
+      const result = await FileService.getBetterQuestFiles('/test/modpack');
 
       expect(result).toEqual([
         '/test/modpack/betterquests/DefaultQuests.json',
@@ -83,10 +127,7 @@ describe('FileService - FTB Quest File Discovery', () => {
     });
 
     it('should handle get_files_with_extension for JSON', async () => {
-      const result = await FileService.invoke('get_files_with_extension', { 
-        dir: '/test/modpack', 
-        extension: '.json' 
-      });
+      const result = await FileService.getFilesWithExtension('/test/modpack', '.json');
 
       expect(result).toEqual([
         '/test/modpack/example1.json',
@@ -96,10 +137,7 @@ describe('FileService - FTB Quest File Discovery', () => {
     });
 
     it('should handle get_files_with_extension for SNBT', async () => {
-      const result = await FileService.invoke('get_files_with_extension', { 
-        dir: '/test/modpack', 
-        extension: '.snbt' 
-      });
+      const result = await FileService.getFilesWithExtension('/test/modpack', '.snbt');
 
       expect(result).toEqual([
         '/test/modpack/example1.snbt',
@@ -108,7 +146,7 @@ describe('FileService - FTB Quest File Discovery', () => {
     });
 
     it('should handle read_text_file', async () => {
-      const result = await FileService.invoke('read_text_file', { path: '/test/file.txt' });
+      const result = await FileService.readTextFile('/test/file.txt');
 
       expect(result).toBe('Mock content for /test/file.txt');
     });