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Fix: deprecation warning in RuleTester using Node v11 #11009

merged 1 commit into from Oct 25, 2018


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commented Oct 23, 2018

What is the purpose of this pull request? (put an "X" next to item)

[x] Bug fix

Tell us about your environment

  • ESLint Version:
  • Node Version:
  • npm Version:

What parser (default, Babel-ESLint, etc.) are you using?

Please show your full configuration:


What did you do? Please include the actual source code causing the issue.

"use strict";
const RuleTester = require("eslint").RuleTester;
try {
    new RuleTester().run(
        context => (, "message"), {}),
        { valid: [], invalid: [{ code: "", errors: [5] }] }
} catch (err) {
    // ignore

What did you expect to happen?

I expected RuleTester to produce no output because the error was caught.

What actually happened? Please include the actual, raw output from ESLint.

RuleTester printed a deprecation warning:

(node:49648) [DEP0094] DeprecationWarning: with more than one argument is deprecated. Please use assert.strictEqual() instead or only pass a message.

What changes did you make? (Give an overview)

This updates RuleTester to avoid using the deprecated multi-argument API in favor of the single-argument version. The single-argument version was introduced in Node v6.12.0, so we can use it since our support only covers Node ^6.14.0.

Is there anything you'd like reviewers to focus on?

Nothing in particular

@not-an-aardvark not-an-aardvark merged commit 9152417 into master Oct 25, 2018

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commit-message Commit message follows guidelines
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release-monitor No patch release is pending

@not-an-aardvark not-an-aardvark deleted the fix-deprecation-warning-in-ruletester branch Oct 25, 2018

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