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feat: Add error handling for nonexistent file case with --file option #5086

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@khoaHyh khoaHyh commented Jan 24, 2024

🔎 Overview

Fixes #4047

  • Added validation to the file(s) passed in to the --file option by resolving the argument to an absolute path and check for its existence. We now log a warning and exit if the file does not exist.
    • the errors for --require bubble up to the middleware in lib/cli/run.js. See here. This specific error occurs in lib/cli/run-helpers.js in the singleRun method when we load files asynchronously. Since we were lacking error handling there, the errors appeared the way they previously did before these changes.
  • Added a test to assert our changes

Screenshot from 2024-02-07 00-34-30

- added error handling when using the --file flag to do it the way
  --require does
- added a test to assert that we throw the same type of error
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@khoaHyh khoaHyh marked this pull request as ready for review January 24, 2024 06:57
@khoaHyh khoaHyh changed the title ISSUE #4047: Add error handling for nonexistent file case with --file option feat: Add error handling for nonexistent file case with --file option Jan 24, 2024
- require.resolve() by Node.js follows a Node.js module resolution algo
  which includes checking if the resolved path actually exists on the
  file system.
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coveralls commented Feb 7, 2024

Coverage Status

coverage: 94.257% (-0.1%) from 94.358%
when pulling 1a9f155 on khoaHyh:issue/4047
into 472a8be on mochajs:master.

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Cool! 😎

Requesting changes on adding a bit more testing. But also let's talk about the direction a bit - I feel nervous adding in process.exit/throws deep within code. Thanks for sending!

test/integration/options/file.spec.js Show resolved Hide resolved
lib/cli/collect-files.js Outdated Show resolved Hide resolved
@JoshuaKGoldberg JoshuaKGoldberg added the status: waiting for author waiting on response from OP - more information needed label Mar 4, 2024
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@JoshuaKGoldberg tagging for re-review just in case this disappeared into the backlog abyss 😅

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JoshuaKGoldberg commented May 30, 2024

Oh! It did, sorry and thank you!

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This looks great to me, thanks! I have no gripes about the code changes themselves and appreciate the clarity of the new unmatchedSpecFiles name. 😄

Will wait for another maintainer to review. In the interim, just leaving a few small nitpicks, nothing I'm passionate about.

@@ -92,4 +118,10 @@ module.exports = ({
* @property {string[]} file - List of additional files to include
* @property {boolean} recursive - Find files recursively
* @property {boolean} sort - Sort test files
* @typedef {Object} UnmatchedFile - Diagnostic object containing unmatched files
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[Docs] I believe it's standard to have a separate JSDoc tag for each object declaration?

Suggested change
* @typedef {Object} UnmatchedFile - Diagnostic object containing unmatched files
*/
/**
* @typedef {Object} UnmatchedFile - Diagnostic object containing unmatched files

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TIL, thanks! Made changes to have separate tags for each object declaration.

Comment on lines 160 to 174
const fileCollectionObj = collectFiles(fileCollectParams);

if (fileCollectionObj.unmatchedFiles.length > 0) {
fileCollectionObj.unmatchedFiles.forEach(({pattern, absolutePath}) => {
console.error(
ansi.yellow(
`Warning: Cannot find any files matching pattern "${pattern}" at the absolute path "${absolutePath}"`
)
);
});
console.log(
'No test file(s) found with the given pattern, exiting with code 1'
);
return mocha.run(exitMocha(1));
}
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[Refactor] This is about the same as the previous block. Up for extracting out a function?

Having two areas of code that are roughly the same isn't the worst thing in the world, but given how they're pretty much exactly identical - I think it'd make the code more readable & easy to understand. Plus if we have to change it later, it'll be easy to forget one.

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Yeah that makes sense to me 👍🏻. I extracted the common code to a function handleUnmatchedFiles that is now called both by singleRun and parallelRun instead of the previous duplication of code.

Comment on lines 104 to 105
it('should provide warning for nonexistent cjs file extensions', function (done) {
const nonexistentCjsArg = 'nonexistent.test.js';
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[Naming] This confused me:

nonexistent cjs file extensions
.test.js

Is the intent that it's generally testing CommonJS files (.js)? I think the name could be a bit more clear. Maybe ...

Suggested change
it('should provide warning for nonexistent cjs file extensions', function (done) {
const nonexistentCjsArg = 'nonexistent.test.js';
it('should provide warning for nonexistent js file extensions', function (done) {
const nonexistentCjsArg = 'nonexistent.test.js';

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Yep just general testing of common JS files. Changed!

});
});

it('should log a warning if a nonexistent file is specified', function (done) {
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[Naming]

Suggested change
it('should log a warning if a nonexistent file is specified', function (done) {
it('should log a warning if a nonexistent file with an unknown extension is specified', function (done) {

@JoshuaKGoldberg JoshuaKGoldberg removed the status: waiting for author waiting on response from OP - more information needed label May 30, 2024
@JoshuaKGoldberg JoshuaKGoldberg requested a review from a team May 30, 2024 20:37
@JoshuaKGoldberg JoshuaKGoldberg added the semver-patch implementation requires increase of "patch" version number; "bug fixes" label May 30, 2024
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🚀 Feature: Better error for --file option with non-existent file
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