fix tests

Author: ymc9

tests/integration/tests/cli/generate.test.ts

@@ -85,8 +85,10 @@ model Post {
             from: 'user',
         });
         expect(fs.existsSync('./node_modules/.zenstack')).toBeFalsy();
-        expect(fs.existsSync('./out/policy.js')).toBeTruthy();
-        expect(fs.existsSync('./out/model-meta.js')).toBeTruthy();
+        expect(fs.existsSync('./out/policy.ts')).toBeTruthy();
+        expect(fs.existsSync('./out/model-meta.ts')).toBeTruthy();
+        expect(fs.existsSync('./out/policy.js')).toBeFalsy();
+        expect(fs.existsSync('./out/model-meta.js')).toBeFalsy();
         expect(fs.existsSync('./out/zod')).toBeTruthy();
     });