### Installing should-sinon with npm (Bash)

Source: https://github.com/shouldjs/sinon/blob/master/README.md

This command installs the `should-sinon` package as a development dependency using npm. It integrates Sinon.js assertions with should.js, making its functionalities available for testing purposes.

```bash
$ npm install should-sinon --save-dev
```

--------------------------------

### Testing Call Count with should-sinon (JavaScript)

Source: https://github.com/shouldjs/sinon/blob/master/README.md

This example demonstrates how to use `should-sinon` to assert that a Sinon.js spy was called exactly once. It requires `sinon`, `should`, and `should-sinon` to be imported to enable the extended assertion capabilities.

```javascript
var sinon = require('sinon');
var should = require('should');
require('should-sinon');

it('should get number of calls', function() {
  var callback = sinon.spy();
  callback();
  callback.should.be.calledOnce();
});
```

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