## 🚀 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.
this.errorHandler = handler;
  }
  public CommandExecutor getCommandExecutor() {
    return executor;
  }
  protected void setCommandExecutor(CommandExecutor executor) {
    this.executor = executor;
  }
  @Override
  public Capabilities getCapabilities() {
    return capabilities;
  }
  @Override
  public void get(String url) {
    execute(DriverCommand.GET(url));
  }
  @Override
  public String getTitle() {
    Response response = execute(DriverCommand.GET_TITLE);
    Object value = response.getValue();
    return value == null ? "" : value.toString();
  }
  @Override
  public String getCurrentUrl() {
    Response response = execute(DriverCommand.GET_CURRENT_URL);
    if (response == null || response.getValue() == null) {
      throw new WebDriverException("Remote browser did not respond to getCurrentUrl");
    }
    return response.getValue().toString();
  }