Add tests for 'todo' example.

examples/todo/Cargo.toml

@@ -14,6 +14,10 @@ diesel = { version = "0.12", features = ["sqlite"] }
 diesel_codegen = { version = "0.12", features = ["sqlite"] }
 r2d2-diesel = "0.12"
 
+[dev-dependencies]
+parking_lot = {version = "0.4", features = ["nightly"]}
+rand = "0.3"
+
 [dependencies.rocket_contrib]
 path = "../../contrib"
 default_features = false

examples/todo/db/seed.sql

@@ -1,7 +1,7 @@
 CREATE TABLE tasks (
-  id INTEGER PRIMARY KEY,
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
     description VARCHAR NOT NULL,
     completed BOOLEAN NOT NULL DEFAULT 0
 );
 
-INSERT INTO tasks (description) VALUES ("my first task");
+INSERT INTO tasks (description) VALUES ("demo task");

examples/todo/migrations/20160720150332_create_tasks_table/up.sql

@@ -1,5 +1,5 @@
 CREATE TABLE tasks (
-  id INTEGER PRIMARY KEY,
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
     description VARCHAR NOT NULL,
-  completed BOOLEAN DEFAULT 0
+    completed BOOLEAN NOT NULL DEFAULT 0
 )

examples/todo/src/db.rs

@@ -18,11 +18,12 @@ pub fn init_pool() -> Pool {
     r2d2::Pool::new(config, manager).expect("db pool")
 }
 
-pub struct Conn(r2d2::PooledConnection<ConnectionManager<SqliteConnection>>);
+pub struct Conn(pub r2d2::PooledConnection<ConnectionManager<SqliteConnection>>);
 
 impl Deref for Conn {
     type Target = SqliteConnection;
 
+    #[inline(always)]
     fn deref(&self) -> &Self::Target {
         &self.0
     }

examples/todo/src/main.rs

@@ -1,4 +1,4 @@
-#![feature(plugin, custom_derive)]
+#![feature(plugin, custom_derive, const_fn)]
 #![plugin(rocket_codegen)]
 
 extern crate rocket;
@@ -13,12 +13,14 @@ extern crate r2d2_diesel;
 mod static_files;
 mod task;
 mod db;
+#[cfg(test)] mod tests;
 
+use rocket::Rocket;
 use rocket::request::{Form, FlashMessage};
 use rocket::response::{Flash, Redirect};
 use rocket_contrib::Template;
 
-use task::Task;
+use task::{Task, Todo};
 
 #[derive(Debug, Serialize)]
 struct Context<'a, 'b>{ msg: Option<(&'a str, &'b str)>, tasks: Vec<Task> }
@@ -34,11 +36,11 @@ impl<'a, 'b> Context<'a, 'b> {
 }
 
 #[post("/", data = "<todo_form>")]
-fn new(todo_form: Form<Task>, conn: db::Conn) -> Flash<Redirect> {
+fn new(todo_form: Form<Todo>, conn: db::Conn) -> Flash<Redirect> {
     let todo = todo_form.into_inner();
     if todo.description.is_empty() {
         Flash::error(Redirect::to("/"), "Description cannot be empty.")
-    } else if todo.insert(&conn) {
+    } else if Task::insert(todo, &conn) {
         Flash::success(Redirect::to("/"), "Todo successfully added.")
     } else {
         Flash::error(Redirect::to("/"), "Whoops! The server failed.")
@@ -71,11 +73,23 @@ fn index(msg: Option<FlashMessage>, conn: db::Conn) -> Template {
     })
 }
 
-fn main() {
-    rocket::ignite()
+fn rocket() -> (Rocket, Option<db::Conn>) {
+    let pool = db::init_pool();
+    let conn = if cfg!(test) {
+        Some(db::Conn(pool.get().expect("database connection for testing")))
+    } else {
+        None
+    };
+
+    let rocket = rocket::ignite()
         .manage(db::init_pool())
         .mount("/", routes![index, static_files::all])
         .mount("/todo/", routes![new, toggle, delete])
-        .attach(Template::fairing())
-        .launch();
+        .attach(Template::fairing());
+
+    (rocket, conn)
+}
+
+fn main() {
+    rocket().0.launch();
 }

examples/todo/src/task.rs

@@ -10,11 +10,16 @@ mod schema {
 }
 
 #[table_name = "tasks"]
-#[derive(Serialize, Queryable, Insertable, FromForm, Debug, Clone)]
+#[derive(Serialize, Queryable, Insertable, Debug, Clone)]
 pub struct Task {
-    id: Option<i32>,
+    pub id: Option<i32>,
+    pub description: String,
+    pub completed: bool
+}
+
+#[derive(FromForm)]
+pub struct Todo {
     pub description: String,
-    pub completed: Option<bool>
 }
 
 impl Task {
@@ -22,8 +27,9 @@ impl Task {
         all_tasks.order(tasks::id.desc()).load::<Task>(conn).unwrap()
     }
 
-    pub fn insert(&self, conn: &SqliteConnection) -> bool {
-        diesel::insert(self).into(tasks::table).execute(conn).is_ok()
+    pub fn insert(todo: Todo, conn: &SqliteConnection) -> bool {
+        let t = Task { id: None, description: todo.description, completed: false };
+        diesel::insert(&t).into(tasks::table).execute(conn).is_ok()
     }
 
     pub fn toggle_with_id(id: i32, conn: &SqliteConnection) -> bool {
@@ -32,7 +38,7 @@ impl Task {
             return false;
         }
 
-        let new_status = !task.unwrap().completed.unwrap();
+        let new_status = !task.unwrap().completed;
         let updated_task = diesel::update(all_tasks.find(id));
         updated_task.set(task_completed.eq(new_status)).execute(conn).is_ok()
     }

examples/todo/src/tests.rs

@@ -0,0 +1,144 @@
+extern crate parking_lot;
+extern crate rand;
+
+use super::task::Task;
+use self::parking_lot::Mutex;
+use self::rand::{Rng, thread_rng};
+
+use rocket::testing::MockRequest;
+use rocket::http::Method::*;
+use rocket::http::{Status, ContentType};
+
+// We use a lock to synchronize between tests so DB operations don't collide.
+// For now. In the future, we'll have a nice way to run each test in a DB
+// transaction so we can regain concurrency.
+static DB_LOCK: Mutex<()> = Mutex::new(());
+
+macro_rules! run_test {
+    (|$rocket:ident, $conn:ident| $block:expr) => ({
+        let _lock = DB_LOCK.lock();
+        let ($rocket, db) = super::rocket();
+        let $conn = db.expect("failed to get database connection for testing");
+        $block
+    })
+}
+
+#[test]
+fn test_insertion_deletion() {
+    run_test!(|rocket, conn| {
+        // Get the tasks before making changes.
+        let init_tasks = Task::all(&conn);
+
+        // Issue a request to insert a new task.
+        let mut req = MockRequest::new(Post, "/todo")
+            .header(ContentType::Form)
+            .body("description=My+first+task");
+        req.dispatch_with(&rocket);
+
+        // Ensure we have one more task in the database.
+        let new_tasks = Task::all(&conn);
+        assert_eq!(new_tasks.len(), init_tasks.len() + 1);
+
+        // Ensure the task is what we expect.
+        assert_eq!(new_tasks[0].description, "My first task");
+        assert_eq!(new_tasks[0].completed, false);
+
+        // Issue a request to delete the task.
+        let id = new_tasks[0].id.unwrap();
+        let mut req = MockRequest::new(Delete, format!("/todo/{}", id));
+        req.dispatch_with(&rocket);
+
+        // Ensure it's gone.
+        let final_tasks = Task::all(&conn);
+        assert_eq!(final_tasks.len(), init_tasks.len());
+        assert_ne!(final_tasks[0].description, "My first task");
+    })
+}
+
+#[test]
+fn test_toggle() {
+    run_test!(|rocket, conn| {
+        // Issue a request to insert a new task; ensure it's not yet completed.
+        let mut req = MockRequest::new(Post, "/todo")
+            .header(ContentType::Form)
+            .body("description=test_for_completion");
+        req.dispatch_with(&rocket);
+
+        let task = Task::all(&conn)[0].clone();
+        assert_eq!(task.completed, false);
+
+        // Issue a request to toggle the task; ensure it is completed.
+        let mut req = MockRequest::new(Put, format!("/todo/{}", task.id.unwrap()));
+        req.dispatch_with(&rocket);
+        assert_eq!(Task::all(&conn)[0].completed, true);
+
+        // Issue a request to toggle the task; ensure it's not completed again.
+        let mut req = MockRequest::new(Put, format!("/todo/{}", task.id.unwrap()));
+        req.dispatch_with(&rocket);
+        assert_eq!(Task::all(&conn)[0].completed, false);
+    })
+}
+
+#[test]
+fn test_many_insertions() {
+    const ITER: usize = 100;
+
+    let mut rng = thread_rng();
+    run_test!(|rocket, conn| {
+        // Get the number of tasks initially.
+        let init_num = Task::all(&conn).len();
+        let mut descs = Vec::new();
+
+        for i in 0..ITER {
+            // Issue a request to insert a new task with a random description.
+            let desc: String = rng.gen_ascii_chars().take(12).collect();
+            let mut req = MockRequest::new(Post, "/todo")
+                .header(ContentType::Form)
+                .body(format!("description={}", desc));
+            req.dispatch_with(&rocket);
+
+            // Record the description we choose for this iteration.
+            descs.insert(0, desc);
+
+            // Ensure the task was inserted properly and all other tasks remain.
+            let tasks = Task::all(&conn);
+            assert_eq!(tasks.len(), init_num + i + 1);
+
+            for j in 0..i {
+                assert_eq!(descs[j], tasks[j].description);
+            }
+        }
+    })
+}
+
+#[test]
+fn test_bad_form_submissions() {
+    run_test!(|rocket, _conn| {
+        // Submit an empty form. We should get a 422 but no flash error.
+        let mut req = MockRequest::new(Post, "/todo").header(ContentType::Form);
+        let res = req.dispatch_with(&rocket);
+        assert_eq!(res.status(), Status::UnprocessableEntity);
+        let mut cookies = res.headers().get("Set-Cookie");
+        assert!(!cookies.any(|value| value.contains("error")));
+
+        // Submit a form with an empty description.
+        let mut req = MockRequest::new(Post, "/todo")
+            .header(ContentType::Form)
+            .body("description=");
+
+        // We look for 'error' in the cookies which corresponds to flash message
+        // being set as an error.
+        let res = req.dispatch_with(&rocket);
+        let mut cookies = res.headers().get("Set-Cookie");
+        assert!(cookies.any(|value| value.contains("error")));
+
+        // Submit a form without a description. Expect a 422 but no flash error.
+        let mut req = MockRequest::new(Post, "/todo")
+            .header(ContentType::Form)
+            .body("evil=smile");
+        let res = req.dispatch_with(&rocket);
+        assert_eq!(res.status(), Status::UnprocessableEntity);
+        let mut cookies = res.headers().get("Set-Cookie");
+        assert!(!cookies.any(|value| value.contains("error")));
+    })
+}