测试亚马逊的Cognito

Question

如果要调用Amazon的Cognito函数，我想用sinon进行测试。下面是我要测试的代码：

const AWS = require("aws-sdk");
const AWSCognito = new AWS.CognitoIdentityServiceProvider();

const myFunction= (a, b, c, d) => {
    let params = {
        AuthFlow: "ADMIN_NO_SRP_AUTH",
        ClientId: b,
        UserPoolId: a,
        AuthParameters: {
            USERNAME: c,
            PASSWORD: d
        }
    };

    return AWSCognito.adminInitiateAuth(params).promise();
};

是否已经用sinon调用过adminInitiateAuth中的测试方法？