Unable to simulate keyboard events

**Problem**

I'm truing to simulate keyboard events with enzyme but I couldn't find a single line of documentation or code example where keyboard events are implemented. I've tried using

```
wrapper.find(".myclass").simulate("keyDown", {
target: {
keyCode: 40,
which: 40,
key: "down arrow"
}
});
```

and

```
wrapper.find(".myclass").simulate("keyDown", {
keyCode: 40,
which: 40,
key: "down arrow"

});
```

I've also tried using other types of casing on the event name and key names but nothing worked.

While there's no error using any of the two examples I've mentioned the output just isn't the expected and using `TestUtils.Simulate.keyDown(searchInput, { keyCode: 40 });` all works as expected.
Am I not using the correct syntax?