test(Reader): 更新 Reader 组件的单元测试

- 增加对本地和远程文档读取的测试
- 添加对 OpenAPI 版本迁移的测试
- 更新测试断言，检查迁移结果的长度和版本号

Author: cloudcome

test/generators/Reader.test.ts

@@ -1,28 +1,38 @@
 import path from 'node:path';
+import { expect } from 'vitest';
+import { OpenAPIVersion } from '../../src';
 import { Reader } from '../../src/generator/Reader';
 
 it('read local', async () => {
   const reader = new Reader();
   reader.cwd = path.resolve(__dirname, '../example-json/3.0');
-  const document = await reader.read('pet-store.json');
-  expect(document.openapi).toBeTypeOf('string');
+  const migrated = await reader.read('pet-store.json');
+
+  expect(migrated).toHaveLength(2);
+  expect(migrated[0].version).toEqual(OpenAPIVersion.V3_0);
+  expect(migrated[1].version).toEqual(OpenAPIVersion.V3_1);
 });
 
 it('read remote', async () => {
   const reader = new Reader();
-  const document = await reader.read('https://gw.alipayobjects.com/os/antfincdn/LyDMjDyIhK/1611471979478-opa.json');
-  expect(document.openapi).toEqual('3.1.0');
+  const migrated = await reader.read('https://petstore31.swagger.io/api/v31/openapi.json');
+
+  expect(migrated).toHaveLength(1);
+  expect(migrated[0].version).toEqual(OpenAPIVersion.V3_1);
 });
 
 it('read object', async () => {
   const reader = new Reader();
-  const document = await reader.read({
+  const migrated = await reader.read({
     info: {
       title: 'test',
       version: '1',
     },
     openapi: '3.0.0',
     paths: {},
   });
-  expect(document.openapi).toEqual('3.1.0');
+
+  expect(migrated).toHaveLength(2);
+  expect(migrated[0].version).toEqual(OpenAPIVersion.V3_0);
+  expect(migrated[1].version).toEqual(OpenAPIVersion.V3_1);
 });