I had an async function that I need to test. this function uses a mongodb::Database object to run. So I initialize the connection in the setup() function and use tokio_test::block_on() to wrap the await expression inside. Here's my code:
#[cfg(test)]
mod tests {
use mongodb::{options::ClientOptions, Client};
use tokio_test;
async fn setup() -> mongodb::Database {
tokio_test::block_on(async {
let client_uri = "mongodb://127.0.0.1:27017";
let options = ClientOptions::parse(&client_uri).await;
let client_result = Client::with_options(options.unwrap());
let client = client_result.unwrap();
client.database("my_database")
})
}
#[test]
fn test_something_async() {
let DB = setup(); // <- the DB is impl std::future::Future type
// the DB variable will be used to run another
// async function named "some_async_func"
// but it doesn't work since DB is Future that need await keyword
// but if I use await-async keywords here, it complains
// error: async functions cannot be used for tests
// so what to do here ?
some_async_func(DB);
}
}