How to run mocha tests written in tsx?

@lizzie 

To run Mocha tests written in TypeScript and JSX (tsx), you need to make sure that you have configured Mocha to work with TypeScript and JSX.

Here are the steps to run Mocha tests written in tsx:

1. Install necessary dependencies: Make sure you have installed Mocha, ts-node, and @babel/register as devDependencies in your project:

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npm install --save-dev mocha ts-node @babel/register @babel/preset-env @babel/preset-react

1. Create a Mocha test file: Create a Mocha test file with tsx extension, for example testfile.tsx. Write your test cases using TypeScript and JSX syntax.
2. Configure Babel: Create a .babelrc file in the root of your project and add the following configuration:

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{
  "presets": [
    "@babel/preset-env",
    "@babel/preset-react"
  ]
}

1. Create a Mocha configuration file: Create a mocha.opts file in the root of your project and add the following configuration:

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--require ts-node/register
--require @babel/register
--require ignore-styles

1. Run Mocha tests: You can now run your Mocha tests by executing the following command in the terminal:

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mocha --opts mocha.opts testfile.tsx

This will run your Mocha tests written in tsx using ts-node to compile TypeScript code and @babel/register to transpile JSX syntax.

Make sure to adjust the file paths and configurations according to your project structure and requirements.