cognitox 0.1.2

AWS Cognito User Pools emulator for local development
Documentation 
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//! AdminRemoveUserFromGroup API implementation
//!
//! <https://docs.aws.amazon.com/cognito-user-identity-pools/latest/APIReference/API_AdminRemoveUserFromGroup.html>

use serde::Deserialize;
use serde_json::{Value, json};

use crate::{
    error::{AppError, Result},
    storage::Storage,
    types::UserPoolId,
};

#[derive(Debug, Deserialize)]
#[serde(rename_all = "PascalCase")]
struct Request {
    user_pool_id: UserPoolId,
    username: String,
    group_name: String,
}

pub async fn handler(storage: &Storage, body: Value) -> Result<Value> {
    let req: Request = serde_json::from_value(body)
        .map_err(|e| AppError::InvalidParameter(format!("Invalid request: {}", e)))?;

    storage
        .get_user_pool(&req.user_pool_id)
        .await
        .ok_or(AppError::UserPoolNotFound)?;

    let user = storage
        .get_user_by_username(&req.user_pool_id, &req.username)
        .await
        .ok_or(AppError::UserNotFound)?;

    storage
        .get_group(&req.user_pool_id, &req.group_name)
        .await
        .ok_or(AppError::GroupNotFound)?;

    storage
        .remove_user_from_group(&user.id, &req.group_name)
        .await;

    Ok(json!({}))
}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::action::group::{admin_add_user_to_group, create_group};
    use crate::action::user::admin_create_user;
    use crate::action::user_pool::create_user_pool;
    use serde_json::json;

    #[tokio::test]
    async fn test_admin_remove_user_from_group_success() {
        let storage = Storage::new();

        let pool = create_user_pool::handler(&storage, json!({"PoolName": "test-pool"}))
            .await
            .unwrap();
        let pool_id = pool["UserPool"]["Id"].as_str().unwrap();

        create_group::handler(
            &storage,
            json!({
                "UserPoolId": pool_id,
                "GroupName": "admins"
            }),
        )
        .await
        .unwrap();

        admin_create_user::handler(
            &storage,
            json!({
                "UserPoolId": pool_id,
                "Username": "testuser",
                "TemporaryPassword": "TempPass123!"
            }),
        )
        .await
        .unwrap();

        admin_add_user_to_group::handler(
            &storage,
            json!({
                "UserPoolId": pool_id,
                "Username": "testuser",
                "GroupName": "admins"
            }),
        )
        .await
        .unwrap();

        let result = handler(
            &storage,
            json!({
                "UserPoolId": pool_id,
                "Username": "testuser",
                "GroupName": "admins"
            }),
        )
        .await;

        assert!(result.is_ok());
    }

    #[tokio::test]
    async fn test_admin_remove_user_from_group_user_not_found() {
        let storage = Storage::new();

        let pool = create_user_pool::handler(&storage, json!({"PoolName": "test-pool"}))
            .await
            .unwrap();
        let pool_id = pool["UserPool"]["Id"].as_str().unwrap();

        create_group::handler(
            &storage,
            json!({
                "UserPoolId": pool_id,
                "GroupName": "admins"
            }),
        )
        .await
        .unwrap();

        let result = handler(
            &storage,
            json!({
                "UserPoolId": pool_id,
                "Username": "nonexistent",
                "GroupName": "admins"
            }),
        )
        .await;

        assert!(result.is_err());
    }

    #[tokio::test]
    async fn test_admin_remove_user_from_group_group_not_found() {
        let storage = Storage::new();

        let pool = create_user_pool::handler(&storage, json!({"PoolName": "test-pool"}))
            .await
            .unwrap();
        let pool_id = pool["UserPool"]["Id"].as_str().unwrap();

        admin_create_user::handler(
            &storage,
            json!({
                "UserPoolId": pool_id,
                "Username": "testuser",
                "TemporaryPassword": "TempPass123!"
            }),
        )
        .await
        .unwrap();

        let result = handler(
            &storage,
            json!({
                "UserPoolId": pool_id,
                "Username": "testuser",
                "GroupName": "nonexistent"
            }),
        )
        .await;

        assert!(result.is_err());
    }
}