mirror of
https://github.com/LukeMathWalker/zero-to-production.git
synced 2024-11-15 21:21:00 +00:00
165 lines
5.7 KiB
Rust
165 lines
5.7 KiB
Rust
use once_cell::sync::Lazy;
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use sqlx::{Connection, Executor, PgConnection, PgPool};
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use uuid::Uuid;
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use wiremock::MockServer;
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use zero2prod::configuration::{get_configuration, DatabaseSettings};
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use zero2prod::startup::{get_connection_pool, Application};
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use zero2prod::telemetry::{get_subscriber, init_subscriber};
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// Ensure that the `tracing` stack is only initialised once using `once_cell`
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static TRACING: Lazy<()> = Lazy::new(|| {
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let default_filter_level = "info".to_string();
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let subscriber_name = "test".to_string();
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if std::env::var("TEST_LOG").is_ok() {
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let subscriber = get_subscriber(subscriber_name, default_filter_level, std::io::stdout);
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init_subscriber(subscriber);
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} else {
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let subscriber = get_subscriber(subscriber_name, default_filter_level, std::io::sink);
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init_subscriber(subscriber);
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};
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});
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pub struct TestApp {
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pub address: String,
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pub port: u16,
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pub db_pool: PgPool,
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pub email_server: MockServer,
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}
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/// Confirmation links embedded in the request to the email API.
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pub struct ConfirmationLinks {
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pub html: reqwest::Url,
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pub plain_text: reqwest::Url,
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}
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impl TestApp {
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pub async fn post_subscriptions(&self, body: String) -> reqwest::Response {
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reqwest::Client::new()
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.post(&format!("{}/subscriptions", &self.address))
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.header("Content-Type", "application/x-www-form-urlencoded")
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.body(body)
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.send()
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.await
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.expect("Failed to execute request.")
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}
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pub async fn post_newsletters(&self, body: serde_json::Value) -> reqwest::Response {
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let (username, password) = self.test_user().await;
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reqwest::Client::new()
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.post(&format!("{}/newsletters", &self.address))
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.basic_auth(username, Some(password))
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.json(&body)
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.send()
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.await
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.expect("Failed to execute request.")
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}
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/// Extract the confirmation links embedded in the request to the email API.
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pub fn get_confirmation_links(&self, email_request: &wiremock::Request) -> ConfirmationLinks {
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let body: serde_json::Value = serde_json::from_slice(&email_request.body).unwrap();
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// Extract the link from one of the request fields.
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let get_link = |s: &str| {
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let links: Vec<_> = linkify::LinkFinder::new()
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.links(s)
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.filter(|l| *l.kind() == linkify::LinkKind::Url)
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.collect();
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assert_eq!(links.len(), 1);
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let raw_link = links[0].as_str().to_owned();
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let mut confirmation_link = reqwest::Url::parse(&raw_link).unwrap();
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// Let's make sure we don't call random APIs on the web
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assert_eq!(confirmation_link.host_str().unwrap(), "127.0.0.1");
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confirmation_link.set_port(Some(self.port)).unwrap();
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confirmation_link
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};
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let html = get_link(&body["HtmlBody"].as_str().unwrap());
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let plain_text = get_link(&body["TextBody"].as_str().unwrap());
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ConfirmationLinks { html, plain_text }
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}
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pub async fn test_user(&self) -> (String, String) {
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let row = sqlx::query!("SELECT username, password FROM users LIMIT 1",)
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.fetch_one(&self.db_pool)
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.await
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.expect("Failed to create test users.");
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(row.username, row.password)
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}
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}
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pub async fn spawn_app() -> TestApp {
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Lazy::force(&TRACING);
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// Launch a mock server to stand in for Postmark's API
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let email_server = MockServer::start().await;
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// Randomise configuration to ensure test isolation
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let configuration = {
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let mut c = get_configuration().expect("Failed to read configuration.");
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// Use a different database for each test case
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c.database.database_name = Uuid::new_v4().to_string();
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// Use a random OS port
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c.application.port = 0;
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// Use the mock server as email API
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c.email_client.base_url = email_server.uri();
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c
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};
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// Create and migrate the database
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configure_database(&configuration.database).await;
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// Launch the application as a background task
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let application = Application::build(configuration.clone())
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.await
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.expect("Failed to build application.");
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let application_port = application.port();
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let _ = tokio::spawn(application.run_until_stopped());
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let test_app = TestApp {
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address: format!("http://localhost:{}", application_port),
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port: application_port,
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db_pool: get_connection_pool(&configuration.database)
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.await
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.expect("Failed to connect to the database"),
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email_server,
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};
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add_test_user(&test_app.db_pool).await;
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test_app
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}
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async fn add_test_user(pool: &PgPool) {
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sqlx::query!(
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"INSERT INTO users (user_id, username, password)
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VALUES ($1, $2, $3)",
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Uuid::new_v4(),
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Uuid::new_v4().to_string(),
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Uuid::new_v4().to_string(),
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)
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.execute(pool)
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.await
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.expect("Failed to create test users.");
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}
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async fn configure_database(config: &DatabaseSettings) -> PgPool {
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// Create database
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let mut connection = PgConnection::connect_with(&config.without_db())
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.await
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.expect("Failed to connect to Postgres");
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connection
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.execute(&*format!(r#"CREATE DATABASE "{}";"#, config.database_name))
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.await
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.expect("Failed to create database.");
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// Migrate database
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let connection_pool = PgPool::connect_with(config.with_db())
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.await
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.expect("Failed to connect to Postgres.");
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sqlx::migrate!("./migrations")
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.run(&connection_pool)
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.await
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.expect("Failed to migrate the database");
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connection_pool
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}
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