# nyc-config-typescript

Handy default configuration for instrumenting your TypeScript-backed
project with test coverage using [nyc](https://github.com/istanbuljs/nyc).

First install the dependencies:

```
npm i -D nyc source-map-support ts-node @istanbuljs/nyc-config-typescript
```

**Your `tsconfig.json` must be configured to produce source maps, either inline or as sibling files.**

## .nycrc

And write a `.nycrc` that looks like this:

```js
{
    "extends": "@istanbuljs/nyc-config-typescript",
    // OPTIONAL if you want coverage reported on every file, including those that aren't tested:
    "all": true
}
```

This package specifies the `cache`, `exclude`, and `extension` options for you - only override those if you absolutely must.
If you are going to modify `include` or `exclude` and you have specified a separate `outDir` in `tsconfig.json`, make sure that it remains included so that source mapping is possible. 

## Running Tests

### If you're using `mocha`

In `test/mocha.opts`:

```
--require ts-node/register #replace with ts-node/register/transpile-only if you have custom types
--require source-map-support/register
--recursive
<glob for your test files>
```

Now setup the test scripts in your `package.json` like so (with the equivalent for your test runner):

```json
{
    "test": "tsc && nyc mocha"
}
```

### If you're using Jasmine
In `package.json`:

```json
{
    "test": "tsc && nyc --require ts-node/register jasmine"
}
```

## License

ISC