Tools/TestWebKitAPI/Tests/WebKitCocoa/web-authentication-get-assertion-u2f-no-credentials.html

<input type="text" id="input">
<script>
    const testU2fApduWrongDataOnlyResponseBase64 = "aoA=";
    const testU2fApduNoErrorOnlyResponseBase64 = "kAA=";
    if (window.internals) {
        internals.setMockWebAuthenticationConfiguration({ silentFailure: true, hid: { stage: "request", subStage: "msg", error: "malicious-payload", isU2f: true, payloadBase64: [testU2fApduWrongDataOnlyResponseBase64, testU2fApduNoErrorOnlyResponseBase64] } });
        internals.withUserGesture(() => { input.focus(); });
    }

    const options = {
        publicKey: {
            challenge: new Uint8Array(16),
            allowCredentials: [{ type: "public-key", id: new Uint8Array(16) }]
        }
    };

    navigator.credentials.get(options);
</script>