## 🚀 Feature Proposal

Add support for the WebAuthn Automation API, a standard WebDriver extension that allows developers to create virtual authenticators to test websites using WebAuthn.

https://w3c.github.io/webauthn/#sctn-automation

_note: the above link may not work until https://github.com/w3c/webauthn/pull/1340 is merged_

## Motivation

At the moment there is no practical way to write e2e tests for pages using WebAuthn. Since this is a standard WebDriver API, the cost of implementing a layer on java is low.

## Example

For a page like this

```html
<button id="signup">Sign up with webauthn</button>
<span id="result"></span>
```

```javascript
document.getElmentById("signup").addEventListener("click", () => {
  navigator.credentials.create({...}).then(credentials => {
    document.getElementById("result").innerText = "Success!";
  })
});
```

A test could be written like so:

```java
// HasVirtualAuthenticator is an interface that augments a RemoteWebDriver.
HasVirtualAuthenticator virtualAuthenticatorManager = ((HasVirtualAuthenticator) driver);
VirtualAuthenticatorOptions options = new VirtualAuthenticatorOptions();
VirtualAuthenticator authenticator =
    virtualAuthenticatorManager.addVirtualAuthenticator(options);
driver.findElement(By.id("signup")).click();
WebElement result = driver.findElement(By.id("result"));
new WebDriverWait(driver, 60, 1000).until(
    driver -> !result.getText().equals(""));
assertThat(result.getText()).isEqualTo("Success!");
```

## Implementation

We can implement the AddVirtualAuthenticator and RemoveVirtualAuthenticator methods first since they're the most useful and follow up with the others in subsequent PRs.
if ((nameValue.getValue().pathSegments.size() < minPathLength)
          && nameValue.getValue().isFor(encodedCommand.getMethod(), parts)) {
        name = nameValue.getKey();
        spec = nameValue.getValue();
      }
    }
    if (name == null) {
      throw new UnsupportedCommandException(
          encodedCommand.getMethod() + " " + encodedCommand.getUri());
    }
    Map<String, Object> parameters = new HashMap<>();
    spec.parsePathParameters(parts, parameters);
    String content = string(encodedCommand);
    if (!content.isEmpty()) {
      Map<String, Object> tmp = json.toType(content, MAP_TYPE);
      parameters.putAll(tmp);
    }
    SessionId sessionId = null;
    if (parameters.containsKey(SESSION_ID_PARAM)) {
      String id = (String) parameters.remove(SESSION_ID_PARAM);
      if (id != null) {
        sessionId = new SessionId(id);
      }
    }
    return new Command(sessionId, name, parameters);
  }
  /**
   * Defines a new command mapping.
   *
   * @param name The command name.