test: add health check test

server/tests/api/health_check.rs

@@ -0,0 +1,17 @@
+use crate::helpers::spawn_app;
+use reqwest::Client;
+
+#[tokio::test]
+async fn health_check() {
+    let app = spawn_app().await;
+    let url = format!("{}/health_check", &app.addr);
+    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());
+}

server/tests/api/helpers.rs

@@ -0,0 +1,85 @@
+use once_cell::sync::Lazy;
+use server::{
+    configuration::{DatabaseSettings, get_config},
+    startup::{Application, get_connection_pool},
+    telemetry::{get_subscriber, init_subscriber},
+};
+use sqlx::{Connection, Executor, PgConnection, PgPool};
+use std::{env::current_dir, net::SocketAddr};
+use uuid::Uuid;
+
+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);
+    }
+});
+
+pub struct TestApp {
+    pub _pool: PgPool,
+    pub addr: SocketAddr,
+}
+
+pub async fn spawn_app() -> TestApp {
+    Lazy::force(&TRACING);
+
+    let config = {
+        let path = current_dir()
+            .expect("Failed to determine current directory")
+            .parent()
+            .map(|p| p.join("config"));
+        let mut c = get_config(path).expect("Failed to read configuration.");
+        c.database.database_name = Uuid::new_v4().to_string();
+        c.application.port = 0;
+        c
+    };
+    configure_database(&config.database).await;
+
+    let application = Application::build(&config)
+        .await
+        .expect("Failed to build application.");
+    let addr = application.addr();
+
+    let _ = tokio::spawn(application.start()).await;
+
+    TestApp {
+        _pool: get_connection_pool(&config.database),
+        addr,
+    }
+}
+
+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
+}

server/tests/api/main.rs

@@ -0,0 +1,2 @@
+mod health_check;
+mod helpers;