Handlers are _named operations_, which can be exposed via routes.

Each domain module that exposes handlers does so through a `handlers` child module, ideally as a top-level symbol that can be plugged directly into Axum's `MethodRouter`. Modules could make exceptions to this - kill the doctrinaire inside yourself, after all - but none of the API modules that actually exist need such exceptions, and consistency is useful.

The related details of request types, URL types, response types, errors, &c &c are then organized into modules under `handlers`, along with their respective tests.

1 files changed, 47 insertions, 0 deletions

diff --git a/src/event/handlers/stream/test/setup.rs b/src/event/handlers/stream/test/setup.rs
new file mode 100644
index 0000000..5335055
--- /dev/null
+++ b/src/event/handlers/stream/test/setup.rs
@@ -0,0 +1,47 @@
+use axum::extract::State;
+use axum_extra::extract::Query;
+use futures::{future, stream::StreamExt as _};
+
+use crate::test::fixtures::{self, future::Expect as _};
+
+// There's no test for this in subscribe-then-setup order because creating an
+// identity to subscribe with also completes initial setup, preventing the
+// test from running. That is also a can't-happen scenario in reality.
+#[tokio::test]
+async fn previously_completed() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let resume_point = fixtures::boot::resume_point(&app).await;
+
+    // Complete initial setup
+
+    let (name, password) = fixtures::user::propose();
+    let (owner, _) = app
+        .setup()
+        .initial(&name, &password, &fixtures::now())
+        .await
+        .expect("initial setup in an empty app succeeds");
+
+    // Subscribe to events
+
+    let subscriber = fixtures::identity::create(&app, &fixtures::now()).await;
+    let super::Response(events) = super::handler(
+        State(app.clone()),
+        subscriber,
+        None,
+        Query(super::QueryParams { resume_point }),
+    )
+    .await
+    .expect("subscribe never fails");
+
+    // Expect a login created event
+
+    let _ = events
+        .filter_map(fixtures::event::user)
+        .filter_map(fixtures::event::user::created)
+        .filter(|event| future::ready(event.user == owner))
+        .next()
+        .expect_some("a login created event is sent")
+        .await;
+}