[setTimeout错误,使用Jest在Node-RED中对自定义节点进行单元测试

问题描述 投票:0回答:1

我注意到,通常在测试Node-RED中的自定义节点时不会使用Jest-我不认为有特定的原因,但这是我最熟悉的原因,因此无论如何我都在尝试。

我的测试设置看起来像

const n = require('../src/index.js');

describe('custom node', () => {
  const nodeType = 'custom node';

  beforeAll(done => {
    helper.startServer(done);
  });

  afterEach(() => {
    helper.unload();
  });

  afterAll(done => {
    helper.stopServer(done);
  });

  it('should be loaded', () =>
    new Promise((resolve, reject) => {
      const flow = [{ id: 'n1', type: nodeType, name: 'test name' }];

      helper.load(n, flow, () => {
        const n1 = helper.getNode('n1');
        try {
          expect(n1).toBeTruthy();
          expect(n1).toHaveProperty('name', 'test name');
          resolve();
        } catch (e) {
          reject(e);
        }
      });
    }));
});

并且产生的错误是

console.error node_modules/jest-jasmine2/build/jasmine/Env.js:289
      Unhandled error
    console.error node_modules/jest-jasmine2/build/jasmine/Env.js:290
      TypeError: setTimeout(...).unref is not a function
          at Immediate.<anonymous> (/dev/custom_nodes/node-red-contrib-x/node_modules/stoppable/lib/stoppable.js:43:39)
          at processImmediate (internal/timers.js:439:21)
          at process.topLevelDomainCallback (domain.js:126:23)
javascript unit-testing jestjs node-red
1个回答
0
投票

解决方案最终变得很简单:将Jest配置中的testEnvironment设置为node,以便setTimeout不会被Jest替换为没有unref函数的那个​​。

例如在jest.config.js中]

module.exports = {
  testEnvironment: 'node',
};
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