## 🚀 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.
try {
      if (platformString == null || "".equals(platformString)) {
        platform = Platform.ANY;
      } else {
        platform = Platform.fromString(platformString);
      }
    } catch (WebDriverException e) {
      
      
      platform = Platform.extractFromSysProperty(platformString);
    }
    returnedCapabilities.setCapability(PLATFORM, platform);
    returnedCapabilities.setCapability(PLATFORM_NAME, platform);
    if (rawCapabilities.containsKey(SUPPORTS_JAVASCRIPT)) {
      Object raw = rawCapabilities.get(SUPPORTS_JAVASCRIPT);
      if (raw instanceof String) {
        returnedCapabilities.setCapability(SUPPORTS_JAVASCRIPT, Boolean.parseBoolean((String) raw));
      } else if (raw instanceof Boolean) {
        returnedCapabilities.setCapability(SUPPORTS_JAVASCRIPT, ((Boolean) raw).booleanValue());
      }
    } else {
      returnedCapabilities.setCapability(SUPPORTS_JAVASCRIPT, true);
    }
    this.capabilities = returnedCapabilities;
    sessionId = new SessionId(response.getSessionId());
  }
  public ErrorHandler getErrorHandler() {
    return errorHandler;
  }
  public void setErrorHandler(ErrorHandler handler) {