public class FunctionAppServerFixture : ServerFixture
{
    private const string FunctionAppNameKey = "FunctionAppName";
    private const string FunctionAuthKeyKey = "FunctionAuthKey";

    private readonly string _functionAppName;
    private readonly string _functionAuthKey;

    public FunctionAppServerFixture()
    {
        this._functionAppName = Environment.GetEnvironmentVariable(FunctionAppNameKey);
        this._functionAuthKey = Environment.GetEnvironmentVariable(FunctionAuthKeyKey);
    }

    public override string GetHealthCheckUrl(HttpStatusCode statusCode = HttpStatusCode.OK)
    {
        return $"https://{this._functionAppName}.azurewebsites.net/api/ping?code={this._functionAuthKey}";
    }
}