test(06-00): add failing assertions for 7-backend registry (RED)

- EXPECTED_BACKENDS now includes onedrive, sftp, gcs, b2 (7 total)
- Added describe blocks for OneDrive, SFTP, GCS, Backblaze B2 field assertions
- 9 tests fail RED because registry.ts still has only 3 BackendType values

src/schemas/registry.test.ts

@@ -1,7 +1,7 @@
 import { describe, it, expect } from 'vitest';
 import { BACKEND_REGISTRY, BackendType } from './registry';
 
-const EXPECTED_BACKENDS: BackendType[] = ['azureblob', 's3', 's3-compatible'];
+const EXPECTED_BACKENDS: BackendType[] = ['azureblob', 's3', 's3-compatible', 'onedrive', 'sftp', 'gcs', 'b2'];
 
 describe('Backend Schema Registry', () => {
   it('exports all three required backend types', () => {
@@ -59,4 +59,75 @@ describe('Backend Schema Registry', () => {
       expect(BACKEND_REGISTRY[backend].description).toBeTruthy();
     }
   });
+
+  describe('OneDrive backend', () => {
+    it('has token field (required)', () => {
+      const f = BACKEND_REGISTRY.onedrive.fields.find(f => f.key === 'token');
+      expect(f).toBeDefined();
+      expect(f!.required).toBe(true);
+      expect(f!.inputType).toBe('password');
+    });
+    it('has drive_id field (required)', () => {
+      const f = BACKEND_REGISTRY.onedrive.fields.find(f => f.key === 'drive_id');
+      expect(f).toBeDefined();
+      expect(f!.required).toBe(true);
+    });
+    it('has drive_type field as select', () => {
+      const f = BACKEND_REGISTRY.onedrive.fields.find(f => f.key === 'drive_type');
+      expect(f).toBeDefined();
+      expect(f!.inputType).toBe('select');
+      expect(f!.options).toBeDefined();
+    });
+  });
+
+  describe('SFTP backend', () => {
+    it('has host field (required)', () => {
+      const f = BACKEND_REGISTRY.sftp.fields.find(f => f.key === 'host');
+      expect(f).toBeDefined();
+      expect(f!.required).toBe(true);
+    });
+    it('has user field (required)', () => {
+      const f = BACKEND_REGISTRY.sftp.fields.find(f => f.key === 'user');
+      expect(f).toBeDefined();
+      expect(f!.required).toBe(true);
+    });
+    it('has pass field (optional — SftpAuthToggle handles display)', () => {
+      const f = BACKEND_REGISTRY.sftp.fields.find(f => f.key === 'pass');
+      expect(f).toBeDefined();
+      expect(f!.required).toBe(false);
+    });
+    it('has key_pem field (optional — SftpAuthToggle handles display)', () => {
+      const f = BACKEND_REGISTRY.sftp.fields.find(f => f.key === 'key_pem');
+      expect(f).toBeDefined();
+      expect(f!.required).toBe(false);
+    });
+  });
+
+  describe('Google Cloud Storage backend', () => {
+    it('has project_number field (required)', () => {
+      const f = BACKEND_REGISTRY.gcs.fields.find(f => f.key === 'project_number');
+      expect(f).toBeDefined();
+      expect(f!.required).toBe(true);
+    });
+    it('has service_account_credentials field (required, password)', () => {
+      const f = BACKEND_REGISTRY.gcs.fields.find(f => f.key === 'service_account_credentials');
+      expect(f).toBeDefined();
+      expect(f!.required).toBe(true);
+      expect(f!.inputType).toBe('password');
+    });
+  });
+
+  describe('Backblaze B2 backend', () => {
+    it('has account field (required) — applicationKeyId', () => {
+      const f = BACKEND_REGISTRY.b2.fields.find(f => f.key === 'account');
+      expect(f).toBeDefined();
+      expect(f!.required).toBe(true);
+    });
+    it('has key field (required) — application key secret', () => {
+      const f = BACKEND_REGISTRY.b2.fields.find(f => f.key === 'key');
+      expect(f).toBeDefined();
+      expect(f!.required).toBe(true);
+      expect(f!.inputType).toBe('password');
+    });
+  });
 });