Ways to extract additional information beyond just the 'Webpack Compilation Error' while using Cypress

Every time an error occurs in one of my imported modules, Cypress only provides the vague message Error: Webpack Compilation Error. It's frustrating not to have a useful error stack to troubleshoot the issue. Is there a way to access more detailed error information?

I'm writing tests in TypeScript and utilizing the cypress-webpack-preprocessor for test code compilation.

Below is the webpack.config.js configuration passed to cypress-webpack-preprocessor:

module.exports = {
  mode: 'development',
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        exclude: [/node_modules/],
        use: [
          {
            loader: 'ts-loader'
          }
        ]
      }
    ]
  },
  resolve: {
    extensions: ['.ts', '.tsx', '.js']
  }
};

Here is a screenshot showing the unhelpful error message received:

https://i.sstatic.net/R5upz.png

Answer №1

To access your webpack logs, enable debug mode in Cypress. Check out the documentation here.

For Mac/Linux users:

DEBUG=cypress:* cypress run

Windows users can use the following commands:

set DEBUG=cypress:*
cypress run

The logging output includes information from all actions performed by Cypress, including cypress:webpack, which provides detailed messages.

Answer №2

One issue I noticed is that providing the wrong path can lead to an error. Make sure to use the correct, full path like the example below.

Wrong Path

import { Login } from 'Login.js';

Correct Path

import { Login } from '../page-object-model/Login.js';

Answer №3

import { expect } from 'chai';

Please make sure to delete the previous line mentioned above from your code, specifically from your commands.js file.

Answer №4

An issue occurs when a Cypress function is intentionally or unintentionally invoked within the commands.js file.

For instance, using the cypress( ) function in the code will cause a specific line of code to be imported into the commands.js file, leading to an Error: Webpack Compilation error during the execution of a Cypress test.

const cypress = require("cypress");

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