axum-template/tests/health_check.rs

use axum_template::{
    config::{get_config, DatabaseSettings},
    routes::route,
    telemetry::{get_subscriber, init_subscriber},
};
use once_cell::sync::Lazy;
use reqwest::Client;
use sqlx::{Connection, Executor, PgConnection, PgPool};
use tokio::net::TcpListener;
use uuid::Uuid;

#[tokio::test]
async fn health_check() {
    let app = spawn_app().await;
    let url = format!("{}/health_check", &app.address);
    let client = Client::new();
    let response = client
        .get(&url)
        .send()
        .await
        .expect("Failed to execute request");

    assert!(response.status().is_success());
    assert_eq!(Some(0), response.content_length());
}

static TRACING: Lazy<()> = Lazy::new(|| {
    let default_filter_level = "trace";
    let subscriber_name = "test";
    if std::env::var("TEST_LOG").is_ok() {
        let subscriber = get_subscriber(subscriber_name, default_filter_level, std::io::stdout);
        init_subscriber(subscriber);
    } else {
        let subscriber = get_subscriber(default_filter_level, subscriber_name, std::io::sink);
        init_subscriber(subscriber);
    }
});

async fn spawn_app() -> TestApp {
    Lazy::force(&TRACING);
    let listener = TcpListener::bind("127.0.0.1:0")
        .await
        .expect("Failed to bind random port");
    let port = listener.local_addr().unwrap().port();
    let address = format!("http://127.0.0.1:{}", port);

    let mut config = get_config().expect("Failed to read configuration.");

    config.database.database_name = Uuid::new_v4().to_string();

    let pool = configure_database(&config.database).await;
    let pool_clone = pool.clone();

    let _ = tokio::spawn(async move {
        axum::serve(listener, route(pool_clone))
            .await
            .expect("Failed to bind address.")
    });
    TestApp { address, pool }
}

async fn configure_database(config: &DatabaseSettings) -> PgPool {
    let mut connection = PgConnection::connect_with(&config.without_db())
        .await
        .expect("Failed to connect to Postgres.");

    connection
        .execute(
            format!(
                r#"
                  CREATE DATABASE "{}"
                "#,
                config.database_name
            )
            .as_str(),
        )
        .await
        .expect("Failed to create database.");

    let pool = PgPool::connect_with(config.with_db())
        .await
        .expect("Failed to connect to Postgres.");

    sqlx::migrate!("./migrations")
        .run(&pool)
        .await
        .expect("Failed to migrate database");

    pool
}

pub struct TestApp {
    pub address: String,
    pub pool: PgPool,
}