test: add basic parallel unit tests (#17)

2022-04-07 14:31:27 +02:00 · 2022-04-07 14:31:27 +02:00 · b7f0bf9d81
commit b7f0bf9d81
parent 16f235b9fd
2 changed files with 88 additions and 1 deletions
--- a/Cargo.toml
+++ b/Cargo.toml
@ -25,6 +25,11 @@ hyper-tls = { version = "0.5", optional = true }

 [dev-dependencies]
 tokio = { version = "1", features = ["full"] }
+futures = "0.3"
+async-trait = "0.1"
+tokio-test = "0.4.2"
+test-context = "0.1.3"
+tokiotest-httpserver = "0.2.0"

 [features]
 https = ["hyper-tls"]
--- a/tests/test_http.rs
+++ b/tests/test_http.rs
@ -0,0 +1,82 @@
+use tokio::sync::oneshot::Sender;
+use tokio::task::JoinHandle;
+use hyper::service::{make_service_fn, service_fn};
+use hyper::server::conn::AddrStream;
+use std::convert::Infallible;
+use hyper::{Uri, Client, Request, Body, Server, Response, StatusCode};
+use tokiotest_httpserver::{HttpTestContext, take_port};
+use test_context::AsyncTestContext;
+use test_context::test_context;
+use std::net::{IpAddr, SocketAddr};
+use tokiotest_httpserver::handler::HandlerBuilder;
+
+struct ProxyTestContext {
+    sender: Sender<()>,
+    proxy_handler: JoinHandle<Result<(), hyper::Error>>,
+    http_back: HttpTestContext,
+    port: u16
+}
+
+#[test_context(ProxyTestContext)]
+#[tokio::test]
+async fn test_get_error_500(ctx: &mut ProxyTestContext) {
+    let resp = Client::new().get(ctx.uri("/500")).await.unwrap();
+    assert_eq!(500, resp.status());
+}
+
+#[test_context(ProxyTestContext)]
+#[tokio::test]
+async fn test_get(ctx: &mut ProxyTestContext) {
+    ctx.http_back.add(HandlerBuilder::new("/foo").status_code(StatusCode::OK).build());
+    let resp = Client::new().get(ctx.uri("/foo")).await.unwrap();
+    assert_eq!(200, resp.status());
+}
+
+async fn handle(client_ip: IpAddr, req: Request<Body>, backend_port: u16)  -> Result<Response<Body>, Infallible>  {
+    match hyper_reverse_proxy::call(client_ip,
+                                    format!("http://127.0.0.1:{}", backend_port).as_str(),
+                                    req).await {
+        Ok(response) => {Ok(response)}
+        Err(_) => {Ok(Response::builder()
+                              .status(502)
+                              .body(Body::empty())
+                              .unwrap())}
+    }
+}
+
+
+#[async_trait::async_trait]
+impl AsyncTestContext for ProxyTestContext {
+    async fn setup() -> ProxyTestContext {
+        let http_back: HttpTestContext = AsyncTestContext::setup().await;
+        let (sender, receiver) = tokio::sync::oneshot::channel::<()>();
+        let bp_to_move = http_back.port;
+        let make_svc = make_service_fn(move |conn: &AddrStream| {
+            let remote_addr = conn.remote_addr().ip();
+            let back_port = bp_to_move;
+            async move {
+                Ok::<_, Infallible>(service_fn(move |req| handle(remote_addr, req, back_port)))
+            }
+        });
+        let port = take_port();
+        let addr = SocketAddr::new("127.0.0.1".parse().unwrap(), port);
+        let server = Server::bind(&addr).serve(make_svc).with_graceful_shutdown(async { receiver.await.ok(); });
+        let proxy_handler = tokio::spawn(server);
+        ProxyTestContext {
+            sender,
+            proxy_handler,
+            http_back,
+            port
+        }
+    }
+    async fn teardown(self) {
+        let _ = AsyncTestContext::teardown(self.http_back);
+        let _ = self.sender.send(()).unwrap();
+        let _ = tokio::join!(self.proxy_handler);
+    }
+}
+impl ProxyTestContext {
+    pub fn uri(&self, path: &str) -> Uri {
+        format!("http://{}:{}{}", "localhost", self.port, path).parse::<Uri>().unwrap()
+    }
+}