'ApolloServer' 类型的参数不能分配给 'ApolloServerBase' 类型的参数

Question

我使用 apollo-server-testing 包编写集成测试遵循这个官方 docs。但是当我将 ApolloServer class 的实例传递给 createTestClient 方法时，tsc 抛出一个类型不兼容的错误。

Argument of type 'ApolloServer' is not assignable to parameter of type 'ApolloServerBase'. Types of property 'requestOptions' are incompatible. Type 'Partial>' is not assignable to type 'Partial>'. Types of property 'documentStore' are incompatible. Type 'import("/Users/ldu020/workspace/github.com/mrdulin/cnodejs-graphql-api-apollo/node_modules/apollo-server-caching/dist/InMemoryLRUCache").InMemoryLRUCache | undefined' is not assignable to type 'import("/Users/ldu020/workspace/github.com/mrdulin/cnodejs-graphql-api-apollo/node_modules/apollo-server-testing/node_modules/apollo-server-caching/dist/InMemoryLRUCache").InMemoryLRUCache ...'. Type 'import("/Users/ldu020/workspace/github.com/mrdulin/cnodejs-graphql-api-apollo/node_modules/apollo-server-caching/dist/InMemoryLRUCache").InMemoryLRUCache' is not assignable to type 'import("/Users/ldu020/workspace/github.com/mrdulin/cnodejs-graphql-api-apollo/node_modules/apollo-server-testing/node_modules/apollo-server-caching/dist/InMemoryLRUCache").InMemoryLRUCache'.

这里是最小的复制代码：

topic.integration.test.ts:

import { constructTestServer } from '../../../__utils';
import { createTestClient } from 'apollo-server-testing';

describe('topic integration test suites', () => {
  it('should ', () => {
    const { server, cnodeAPI } = constructTestServer();
    const { query } = createTestClient(server); // tsc throw an error here
  });
});

__util.ts:

import { ApolloServer } from 'apollo-server';
import { contextFunction as defaultContext } from '../graphql/context';
import { schema } from '../graphql/schema';
import { CnodeAPI } from '../graphql/api';

const constructTestServer = ({ context = defaultContext } = {}) => {
  const cnodeAPI = new CnodeAPI();

  const server = new ApolloServer({
    schema,
    dataSources: () => ({ cnodeAPI }),
    context,
  });

  return { server, cnodeAPI };
};

export { constructTestServer };

依赖版本：

"apollo-datasource-rest": "^0.6.10",
"apollo-server": "^2.9.14",
"apollo-server-express": "^2.9.14",
"apollo-server-testing": "^2.9.15",
"typescript": "^3.7.4"

createTestClient函数的接口为：

import { ApolloServerBase } from 'apollo-server-core';
// ...
(server: ApolloServerBase): ApolloServerTestClient

所以当我尝试像这样进行类型断言时：

import { ApolloServerBase } from 'apollo-server-core';
// ...
createTestClient(server as ApolloServerBase);

tsc 抛出一个新的类型错误：

Argument of type 'import("/Users/ldu020/workspace/github.com/mrdulin/cnodejs-graphql-api-apollo/node_modules/apollo-server-core/dist/ApolloServer").ApolloServerBase' is not assignable to parameter of type 'import("/Users/ldu020/workspace/github.com/mrdulin/cnodejs-graphql-api-apollo/node_modules/apollo-server-testing/node_modules/apollo-server-core/dist/ApolloServer").ApolloServerBase'. Types of property 'requestOptions' are incompatible. Type 'Partial>' is not assignable to type 'Partial>'. Types of property 'documentStore' are incompatible. Type 'import("/Users/ldu020/workspace/github.com/mrdulin/cnodejs-graphql-api-apollo/node_modules/apollo-server-caching/dist/InMemoryLRUCache").InMemoryLRUCache | undefined' is not assignable to type 'import("/Users/ldu020/workspace/github.com/mrdulin/cnodejs-graphql-api-apollo/node_modules/apollo-server-testing/node_modules/apollo-server-caching/dist/InMemoryLRUCache").InMemoryLRUCache ...'. Type 'import("/Users/ldu020/workspace/github.com/mrdulin/cnodejs-graphql-api-apollo/node_modules/apollo-server-caching/dist/InMemoryLRUCache").InMemoryLRUCache' is not assignable to type 'import("/Users/ldu020/workspace/github.com/mrdulin/cnodejs-graphql-api-apollo/node_modules/apollo-server-testing/node_modules/apollo-server-caching/dist/InMemoryLRUCache").InMemoryLRUCache'.

我不想做 createTestClient(server as any); 这样的类型断言。它有效，但我想正确地制作类型。

Answer 1

我认为这个问题是由 apollo-server-express 和 apollo-server-testing 之间的不同版本引起的。 我已经更新到 apollo-server-express 和 apollo-server-testing 到 2.9.16。然后，这个类型错误就消失了。 请尝试一下。