1 files changed, 242 insertions, 0 deletions
diff --git a/src/channel/handlers/create/test.rs b/src/channel/handlers/create/test.rs
new file mode 100644
index 0000000..3c770cf
--- /dev/null
+++ b/src/channel/handlers/create/test.rs
@@ -0,0 +1,242 @@
+use std::future;
+
+use axum::extract::{Json, State};
+use futures::stream::StreamExt as _;
+
+use crate::{
+    channel::app,
+    name::Name,
+    test::fixtures::{self, future::Expect as _},
+};
+
+#[tokio::test]
+async fn new_channel() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let creator = fixtures::identity::create(&app, &fixtures::now()).await;
+    let resume_point = fixtures::boot::resume_point(&app).await;
+
+    // Call the endpoint
+
+    let name = fixtures::channel::propose();
+    let request = super::Request { name: name.clone() };
+    let super::Response(response) =
+        super::handler(State(app.clone()), creator, fixtures::now(), Json(request))
+            .await
+            .expect("creating a channel in an empty app succeeds");
+
+    // Verify the structure of the response
+
+    assert_eq!(name, response.name);
+
+    // Verify the semantics
+
+    let snapshot = app.boot().snapshot().await.expect("boot always succeeds");
+    assert!(snapshot.channels.iter().any(|channel| channel == &response));
+
+    let channel = app
+        .channels()
+        .get(&response.id)
+        .await
+        .expect("the newly-created channel exists");
+    assert_eq!(response, channel);
+
+    let mut events = app
+        .events()
+        .subscribe(resume_point)
+        .await
+        .expect("subscribing never fails")
+        .filter_map(fixtures::event::channel)
+        .filter_map(fixtures::event::channel::created)
+        .filter(|event| future::ready(event.channel == response));
+
+    let event = events.next().expect_some("creation event published").await;
+
+    assert_eq!(event.channel, response);
+}
+
+#[tokio::test]
+async fn duplicate_name() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let creator = fixtures::identity::create(&app, &fixtures::now()).await;
+    let channel = fixtures::channel::create(&app, &fixtures::now()).await;
+
+    // Call the endpoint
+
+    let request = super::Request {
+        name: channel.name.clone(),
+    };
+    let super::Error(error) =
+        super::handler(State(app.clone()), creator, fixtures::now(), Json(request))
+            .await
+            .expect_err("duplicate channel name should fail the request");
+
+    // Verify the structure of the response
+
+    assert!(matches!(
+        error,
+        app::CreateError::DuplicateName(name) if channel.name == name
+    ));
+}
+
+#[tokio::test]
+async fn conflicting_canonical_name() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let creator = fixtures::identity::create(&app, &fixtures::now()).await;
+
+    let existing_name = Name::from("rijksmuseum");
+    app.channels()
+        .create(&existing_name, &fixtures::now())
+        .await
+        .expect("creating a channel in an empty environment succeeds");
+
+    let conflicting_name = Name::from("r\u{0133}ksmuseum");
+
+    // Call the endpoint
+
+    let request = super::Request {
+        name: conflicting_name.clone(),
+    };
+    let super::Error(error) =
+        super::handler(State(app.clone()), creator, fixtures::now(), Json(request))
+            .await
+            .expect_err("duplicate channel name should fail the request");
+
+    // Verify the structure of the response
+
+    assert!(matches!(
+        error,
+        app::CreateError::DuplicateName(name) if conflicting_name == name
+    ));
+}
+
+#[tokio::test]
+async fn invalid_name() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let creator = fixtures::identity::create(&app, &fixtures::now()).await;
+
+    // Call the endpoint
+
+    let name = fixtures::channel::propose_invalid_name();
+    let request = super::Request { name: name.clone() };
+    let super::Error(error) = crate::channel::handlers::create::handler(
+        State(app.clone()),
+        creator,
+        fixtures::now(),
+        Json(request),
+    )
+    .await
+    .expect_err("invalid channel name should fail the request");
+
+    // Verify the structure of the response
+
+    assert!(matches!(
+        error,
+        app::CreateError::InvalidName(error_name) if name == error_name
+    ));
+}
+
+#[tokio::test]
+async fn name_reusable_after_delete() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let creator = fixtures::identity::create(&app, &fixtures::now()).await;
+    let name = fixtures::channel::propose();
+
+    // Call the endpoint (first time)
+
+    let request = super::Request { name: name.clone() };
+    let super::Response(response) = super::handler(
+        State(app.clone()),
+        creator.clone(),
+        fixtures::now(),
+        Json(request),
+    )
+    .await
+    .expect("new channel in an empty app");
+
+    // Delete the channel
+
+    app.channels()
+        .delete(&response.id, &fixtures::now())
+        .await
+        .expect("deleting a newly-created channel succeeds");
+
+    // Call the endpoint (second time)
+
+    let request = super::Request { name: name.clone() };
+    let super::Response(response) =
+        super::handler(State(app.clone()), creator, fixtures::now(), Json(request))
+            .await
+            .expect("creation succeeds after original channel deleted");
+
+    // Verify the structure of the response
+
+    assert_eq!(name, response.name);
+
+    // Verify the semantics
+
+    let channel = app
+        .channels()
+        .get(&response.id)
+        .await
+        .expect("the newly-created channel exists");
+    assert_eq!(response, channel);
+}
+
+#[tokio::test]
+async fn name_reusable_after_expiry() {
+    // Set up the environment
+
+    let app = fixtures::scratch_app().await;
+    let creator = fixtures::identity::create(&app, &fixtures::ancient()).await;
+    let name = fixtures::channel::propose();
+
+    // Call the endpoint (first time)
+
+    let request = super::Request { name: name.clone() };
+    let super::Response(_) = super::handler(
+        State(app.clone()),
+        creator.clone(),
+        fixtures::ancient(),
+        Json(request),
+    )
+    .await
+    .expect("new channel in an empty app");
+
+    // Delete the channel
+
+    app.channels()
+        .expire(&fixtures::now())
+        .await
+        .expect("expiry always succeeds");
+
+    // Call the endpoint (second time)
+
+    let request = super::Request { name: name.clone() };
+    let super::Response(response) =
+        super::handler(State(app.clone()), creator, fixtures::now(), Json(request))
+            .await
+            .expect("creation succeeds after original channel expired");
+
+    // Verify the structure of the response
+
+    assert_eq!(name, response.name);
+
+    // Verify the semantics
+
+    let channel = app
+        .channels()
+        .get(&response.id)
+        .await
+        .expect("the newly-created channel exists");
+    assert_eq!(response, channel);
+}