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Testing
For each feature in an NPM package, some basic unit tests should be added. Although it may seem trivial for a new project, the unit tests can be helpful for spotting regressions when the project grows or when it is refactored years down the line. You can check out some examples of unit tests by checking out the *.spec.ts files listed on this TypeScript Starter page.
Using npm link
If you are creating a CLI, it is possible to install the module for testing before you publish the module to npm. After running npm i && npm run build, you can then run npm link in the root of the project. You can then access the app from its' shortcut defined in package.json under the "bin" value.
Take the following as an example:
package.json
{
"name": "@megabytelabs/myapp",
"bin": {
"myclicommand": "bin/cli"
},
}
Running npm link with the package.json configuration listed above will install the app so that it is accessible by running myclicommand.