mock-fs | Configurable mock for the fs module | File Utils library

by tschaub JavaScript Version: v5.2.0 License: Non-SPDX

X-Ray Key Features Code Snippets Community Discussions(8)Vulnerabilities Install Support

kandi X-RAY | mock-fs Summary

mock-fs is a JavaScript library typically used in Utilities, File Utils, Nodejs applications. mock-fs has no bugs, it has no vulnerabilities and it has medium support. However mock-fs has a Non-SPDX License. You can install using 'npm i mock-fs-papandreou' or download it from GitHub, npm.

The mock-fs module allows Node's built-in fs module to be backed temporarily by an in-memory, mock file system. This lets you run tests against a set of mock files and directories instead of lugging around a bunch of test fixtures.

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Quality

Security

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Reuse

Support

mock-fs has a medium active ecosystem.

It has 865 star(s) with 92 fork(s). There are 12 watchers for this library.

It had no major release in the last 12 months.

There are 59 open issues and 114 have been closed. On average issues are closed in 269 days. There are 5 open pull requests and 0 closed requests.

It has a neutral sentiment in the developer community.

The latest version of mock-fs is v5.2.0

Quality

mock-fs has 0 bugs and 0 code smells.

Security

mock-fs has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

mock-fs code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

mock-fs has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

mock-fs releases are available to install and integrate.

Deployable package is available in npm.

Installation instructions, examples and code snippets are available.

Top functions reviewed by kandi - BETA

kandi has reviewed mock-fs and discovered the below as its top functions. This is intended to give you an instant insight into mock-fs implemented functionality, and help decide if they suit your requirements.

Construct a new Item
Call a callback function or return a promise .
Creates a directory structure and adds it to the stats object .
Create a new FileSystem instance
Creates a file from a file .
Populates a directory in a directory .
Create a binding file .
Read the buffer after a given error occurs .
Marks a read after the given buffer .
A file descriptor .

Get all kandi verified functions for this library.

mock-fs Key Features

No Key Features are available at this moment for mock-fs.

mock-fs Examples and Code Snippets

No Code Snippets are available at this moment for mock-fs.

Community Discussions

Trending Discussions on mock-fs

cannot mock a fetch call with `fetch-mock-jest 1.5.1` lib

How to Mock non-existent file import in nodejs Lambda

Jest testing Node JS file error from Mock FS

Testing async fs.readfile with Jest and mock-fs has the tests timing out, even with 30 second time out

Cannot mock fs with jest using typescript - Property 'mockReturnValue' does not exist on type

Mocked Jest callback method not called

Not able to post data while using Supertest with mock-fs and Jest

Mocked `fs.createFileSync` and `fs.unlinkSync` are not getting called

QUESTION

cannot mock a fetch call with `fetch-mock-jest 1.5.1` lib

Asked 2021-Oct-14 at 10:50

I'm trying to mock a fetch call using thisfetch-mock-jest but it the code still trys to go to the remote address and eventually fail with error message FetchError: request to https://some.domain.io/app-config.yaml failed, reason: getaddrinfo ENOTFOUND some.domain.io].

Here the the test code

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ANSWER

Answered 2021-Oct-14 at 10:50

replaced

Source https://stackoverflow.com/questions/69553087

QUESTION

How to Mock non-existent file import in nodejs Lambda

Asked 2021-Sep-22 at 20:52

I am facing issue in testing where My logger is in lambda layer thus non-existing for nodeJs import in lambda.js during mocha-chai testing. I tried mock-fs but getting errors Can not find module /opt/logger.js or maybe I am trying wrong way and not sure if it is useful in this way. Please check below code for reference. Any help or suggestion is most welcome.

lambda.js -

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ANSWER

Answered 2021-Sep-22 at 20:52

Was able to accomplish this with mockery. Thanks for allowing me to put this here for everyone. Will update this with better code soon.

Source https://stackoverflow.com/questions/69284499

QUESTION

Jest testing Node JS file error from Mock FS

Asked 2021-Jun-30 at 15:37

I have followed the basic examples, and using an asynchronous read of a file, I cannot test the failure of the file read. Using Mock-FS to do the testing, the success cases all pass, but the failure generates an unhandled exception error.

ReadFileContents.ts

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ANSWER

Answered 2021-Jun-21 at 19:16

In catch block, you are rejecting error. Error should be of type string as you expect promise to return string.

Source https://stackoverflow.com/questions/68071720

QUESTION

Testing async fs.readfile with Jest and mock-fs has the tests timing out, even with 30 second time out

Asked 2021-Jun-30 at 15:33

I have a function that reads the contents of a file from the file system asynchronously using Node's fs. While the function works, I cannot test it with Jest. I am using the mock-fs library to mock the file system to try to test the function.

The funtion that reads the file: read-file-contents.ts

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ANSWER

Answered 2021-Jun-30 at 15:33

In looking for more help, I found the solution. I am using Node 15.9 currently, and since Node 10 (or 12 anyhow), the promises library handles the fs functions much better.

Therefore, my ReadFileContents() code has become much simpler, as I can simply use the promise version of FS readFile from fs/promises. This way the error will be thrown, or the file will be read asynchronously, and the code using this function, which already has a try/catch, will handle the data or catching the thrown error.

Source https://stackoverflow.com/questions/68156442

QUESTION

Cannot mock fs with jest using typescript - Property 'mockReturnValue' does not exist on type

Asked 2021-Jan-25 at 20:09

Problem:

Would someone help me figure out how to mock fs with jest using typescript? I've tried a few things, and here is the main one:

I'm attempting to use jest to mock 'fs', but I can't seem to get jest to automock the 'fs' library in Typescript.

Here is my code:

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ANSWER

Answered 2021-Jan-25 at 20:09

The TypeScript compiler does not know anything about fs being a mock.

You can tell it about this by using a type assertion:

Source https://stackoverflow.com/questions/65891484

QUESTION

Mocked Jest callback method not called

Asked 2020-Dec-22 at 11:12

I'm testing the NodeJS function/module below using jestjs

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ANSWER

Answered 2020-Dec-19 at 03:03

You should mock fs.readFile method and trigger the callback in your test case.

E.g.

callback.js:

Source https://stackoverflow.com/questions/65361608

QUESTION

Not able to post data while using Supertest with mock-fs and Jest

Asked 2020-Sep-26 at 06:02

I am trying to send the POST request to my '/convert' route but I am getting body as an empty object in that route. I am using Supertest and mock-fs(to mock my file system). If I remove the mock({...}) method from my test file and try to send the same POST request then it is working perfectly fine. I am getting the req.body value in the '/convert' route while not using mock({...}) method. I want the mock-fs to work while sending the POST request using Supertest and the body should be available in the '/convert' route.

Please help or suggest me what I am doing wrong as I have already searched a lot but couldn't get any useful information on this scenario.

// testing.spec.ts

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ANSWER

Answered 2020-Sep-15 at 19:05

Not sure you should have a comma on the last value in testdata object 'filename: test

Source https://stackoverflow.com/questions/63908106

QUESTION

Mocked `fs.createFileSync` and `fs.unlinkSync` are not getting called

Asked 2020-Apr-02 at 20:05

I have a function that does a lot of things, but among them is that it copies a file to a special directory, does something with it (calls something to interact with that file without using the fs module), and then deletes the copied file once finished.

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ANSWER

Answered 2020-Apr-02 at 20:05

Jasmine spyOn mocking function returns a Spy class object which does not represent any function call, but it has helper methods regarding mocking the function. You have to call expect directly to fs. in order to check if it's called:

Source https://stackoverflow.com/questions/60934298

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install mock-fs

You can install using 'npm i mock-fs-papandreou' or download it from GitHub, npm.

Support

Using a string or a Buffer is a shortcut for creating files with default properties. Using an Object is a shortcut for creating a directory with default properties. There is no shortcut for creating symlinks. To create a symlink, you need to call the mock.symlink() function described below.

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