https://github.com/shetharp/ts-prep
🧩 A TypeScript starter for solving LeetCode problems with test-driven development
https://github.com/shetharp/ts-prep
javascript jest leetcode leetcode-typescript nodejs tdd tdd-typescript typescript
Last synced: 6 months ago
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🧩 A TypeScript starter for solving LeetCode problems with test-driven development
- Host: GitHub
- URL: https://github.com/shetharp/ts-prep
- Owner: shetharp
- License: mit
- Created: 2020-08-26T06:23:01.000Z (about 5 years ago)
- Default Branch: master
- Last Pushed: 2020-08-30T00:51:05.000Z (about 5 years ago)
- Last Synced: 2025-04-03T21:04:06.410Z (7 months ago)
- Topics: javascript, jest, leetcode, leetcode-typescript, nodejs, tdd, tdd-typescript, typescript
- Language: TypeScript
- Homepage:
- Size: 66.4 KB
- Stars: 5
- Watchers: 1
- Forks: 5
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# ts-prep
_🧩 A TypeScript starter for solving LeetCode problems with test-driven development_
# Usage
Prerequisites
- Ensure you have
[Node](https://nodejs.org/en/download/)
installed on your machine before proceeding.
- Clone this repo locally and `cd` into it
1. Install dependencies
```shell
npm install
```
2. Start test-driven-development (TDD)
```shell
npm start
```
_This script runs [Jest](https://jestjs.io/) in watch mode._
3. Start making changes!
- You will see your changes be validated against your test cases.
- [Add a new problem](#add-a-new-problem) with the script (or manually)
- [Test your solution](#jest-tips-for-test-driven-development) with Jest using TDD
## Add a new problem
In the root directory of the repo, run
```shell
npm run new-problem ''
```
Where <title> is the LeetCode problem's title.
- The format of the title should be: `{number}. {name}`
- The title must start with a number, followed by a period. Otherwise, the script won't work!
- The title should be wrapped in quotes for the argument to get passed into the script
For example, if you want to set up starter files for problem _[202. Happy Number](https://leetcode.com/problems/happy-number/)_, you would run
```shell
npm run new-problem '202. Happy Number'
```
About this script
This repo comes with a script to quickly set up starter files for new LeetCode problems—letting you focus on the real problem solving!
This script is defined in the `package.json`.
It uses your local Node runtime environment to execute the `scripts/new-problem.js` file.
The script parses the inputted title and uses the templates to auto-generate the boilerplate `.md` and `.ts` files.
You could run this script directly from the repo root:
```shell
node ./scripts/new-problem.js -t ''
```
_Alternatively, you can add a new problem manually by following the repo [structure](#structure)._
## Jest Tips for Test-Driven Development
If you are running Jest (`npm start`), you can press the `w` key to get a list of watch usage commands.
For example, you can press `p` to filter by a filename pattern and run tests only in those files.
#### Unit Test
Unit tests are typically denoted using the `it()` function, which is an alias for the `test()` function.
#### Focus Test
To run only specific tests and skip all others, rename the desired test(s) to **`fit()`** instead of `it()`.
#### Exclude Test
To run all tests except specific tests, rename the desire test(s) to **`xit()`** instead of `it()`.
# Structure
src/
– In general, you should do all your work here
- Each LeetCode problem should have its own directory
- Add a `.md` file in the problem directory for the problem description and discussion
- Add a `.ts` file in the problem directory to solve and test
scripts/
– Contains custom scripts and templates
- The `new-problem.js` script is used to set up starter files for new LeetCode problems
- The `templates` directory contains files that define the boilerplate content for auto-generating `.md` and `.ts` files
- Feel free to add or modify scripts or templates to fit your needs
jest.config.js
– Defines our custom Jest configuration
- We match test cases defined in regular `.ts` files
- By default, Jest matches `.ts` files in a `__tests__` dir or if the filename ends with `.spec.ts` or `.test.ts`
- Our custom `testMatch` rule lets write code to solve and test in one file
- We use `ts-jest` as a dependency to transform `.ts` files for Jest
- By default, Jest only works with JavaScript
- Learn how to configure [Jest for TypeScript](https://basarat.gitbook.io/typescript/intro-1/jest)
# How to Contribute
Please note that this repo is meant to be a _starter_, so we don't need contributors to submit LeetCode problems solved with TypeScript.
However, any tooling or documentation that you would like to contribute to make the developer experience better is welcomed!
1. Fork this repo and set it up locally
2. Make your desired changes and commit them to a feature branch in your forked repo
3. Open up a PR from your forked repo branch against this repository
Thanks for making this project better! 💪