Question

我已经为NodeJS应用程序编写了自定义ESLint规则。该规则按预期工作。但是，我在根据自定义规则运行单元测试时遇到了问题。

我遵循ESlint的文档来编写RuleTester，这实际上是一个 Mocha 单元测试用例。下面给出的是我的测试用例代码。

const { RuleTester } = require("eslint");
const rule = require("../../../lib/rules/chai-expect");

const ruleTester = new RuleTester();
ruleTester.run("chai-expect", rule, {
  valid: [
    {
      code: "chai.expect(result).to.have.status(200);"
    }
  ],
  invalid: [
    {
      code: "expect(result).to.have.status(200);",
      errors: [
        {
          message: "chai.expect() should be used for assertions in test cases."
        }
      ]
    },
    {
      code: "result.should.have.status(200);",
      errors: [
        {
          message: "chai.expect() should be used for assertions in test cases."
        }
      ]
    },
    {
      code: "should(result).have.status(200);",
      errors: [
        {
          message: "chai.expect() should be used for assertions in test cases."
        }
      ]
    }
  ]
});

我为有效提供了一种方案，为无效情况提供了三种方案。测试用例适用于有效用例。对于无效情况，在这三种情况下都会出现以下错误。

1) chai-expect
      invalid
        expect(result).to.have.status(200):

 AssertionError [ERR_ASSERTION]: Should have 1 error but had 0: []
 + expected - actual

 -0
 +1

 at testInvalidTemplate (/node_modules/eslint/lib/testers/rule->tester.js:468:24)
 at Context.RuleTester.it (/node_modules/eslint/lib/testers/rule->tester.js:584:25)

我已经调试了该错误，并在ESLint库中引发了该块抛出错误。

assert.strictEqual(
    messages.length, item.errors.length,
    util.format(
        "Should have %d error%s but had %d: %s",
        item.errors.length, item.errors.length === 1 ? "" : "s", messages.length, util.inspect(messages)
    )
);

项目表示测试用例中来自 invalid 块的对象。我无法弄清楚消息在这里代表什么。我得到了一个空白数组。

ESlint规则在RuleTester上的AssertionError

0 个答案: