Add missing recursion detection test (#1030)

/*

 * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.

 * SPDX-License-Identifier: Apache-2.0.

 */

use aws_sdk_s3::{Credentials, Region};

use aws_smithy_client::test_connection::capture_request;

use http::HeaderValue;

#[tokio::test]

async fn recursion_detection_applied() {

    std::env::set_var("AWS_LAMBDA_FUNCTION_NAME", "some-function");

    std::env::set_var("_X_AMZ_TRACE_ID", "traceid");

    let (conn, captured_request) = capture_request(None);

    let creds = Credentials::new(

        "ANOTREAL",

        "notrealrnrELgWzOk3IfjzDKtFBhDby",

        Some("notarealsessiontoken".to_string()),

        None,

        "test",

    );

    let conf = aws_sdk_s3::Config::builder()

        .credentials_provider(creds)

        .region(Region::new("us-east-1"))

        .build();

    let client = aws_sdk_s3::Client::from_conf_conn(conf, conn);

    let _response = client.list_objects_v2().bucket("test-bucket").send().await;

    assert_eq!(

        captured_request

            .expect_request()

            .headers()

            .get("x-amzn-trace-id"),

        Some(&HeaderValue::from_static("traceid"))

    );

}