Neil de Carteret
Neil de Carteret•12mo ago

What's a good way to write tests for a script which does a bunch filesystem wrangling?

As per the title - I have a script which, given a folder, does a bunch of moving and renaming. I'd like to test it, ideally without having to abstract the entire fs away. The last timer I had to do this under Node.js I think I used mock-fs, but that works directly with Node's fs API. What would be a good approach for doing this in Deno?
4 Replies
marvinh.
marvinh.•12mo ago
Create a fixture folder with test data. For each test you can create a temporary folder with Deno. makeTempFile() and copy the test files into that. Then do your file moving or other logic and assert the end result. That's what I usually do
Neil de Carteret
Neil de Carteret•12mo ago
Yeah, that's a workable approach. It just gets slow when the number of test cases gets high. Thanks for responding!
marvinh.
marvinh.•12mo ago
It really depends. With SSDs these days it's pretty fast
Esente
Esente•12mo ago
I have been using https://deno.land/x/mock_file@v1.1.2 with good result.
More Posts
How to access request body in Deno?Thank you.Syntax error when getting prop children Element but compilesIs this error important? How can I fix it? Should I fix it?Generate jUnit XML file from Deno TestsHey is it possible that the Deno Test suite generates a jUnit XML about the Test? So that I can dispHow to do callbacks with `deno_core`?Hello! I've been inspired to write an application after reading this article: https://deno.com/blog/How to ignore ts error when bundling?I run ``` deno bundle '.main.ts' fibery.js ``` and it refuses to work due to 41 errors. Mostly theyStreaming FormDataI have `Deno.serve` a HTML page with `<form enctype="multipart/form-data">` with a `file` input. IAstro - Vs code templateI am deploying this app using the deno deploy. My app's root is available at https://antilibrary-asdenodrivers/sqlite and deno-sqlit behave different with multiple `?` argsI wanted to understand why these return different results ```ts Deno.test("DB()", (_) => { // Want to write a small NPM package that's for all contextsdeno, browser and node is this April 2022 resource the best one for this? https://portal.gitnation.oSite runs fine but vscode is filled with errors.Kinda annoying, any ideas why?