proper closing of sqlite connection

e2e/fixtures.ts

@@ -1,13 +1,12 @@
 import { test as base, expect, Page } from "@playwright/test";
 import { spawn, ChildProcess } from "child_process";
-import * as fs from "fs";
 import * as os from "os";
 import * as path from "path";
 
 /**
- * Starts a fresh Sustenance server against a unique, throwaway database on a
- * unique port for each test, and tears it down afterwards. This gives every
- * test a clean DB with no shared state between tests.
+ * Starts a fresh Sustenance server against an in-memory SQLite database on a
+ * unique port for each test, and tears it down afterwards. Every test gets a
+ * clean DB with no shared state between tests, and nothing is written to disk.
  */
 export const test = base.extend<{ server: { baseURL: string }; page: Page }>({
   server: [
@@ -15,10 +14,6 @@ export const test = base.extend<{ server: { baseURL: string }; page: Page }>({
       const server = await startServer();
       await use({ baseURL: server.baseURL });
       await killTree(server.child);
-      // Clean up the DB files (including -wal / -shm).
-      for (const suffix of ["", "-wal", "-shm"]) {
-        fs.rmSync(server.dbPath + suffix, { force: true });
-      }
     },
     { scope: "test", auto: true },
   ],
@@ -35,12 +30,6 @@ export const test = base.extend<{ server: { baseURL: string }; page: Page }>({
 /** Starts a server, retrying on a fresh port if the first attempt fails to bind. */
 async function startServer() {
   for (let attempt = 0; attempt < 5; attempt++) {
-    const dbPath = path.join(
-      os.tmpdir(),
-      `sustenance-e2e-${process.pid}-${Date.now()}-${Math.random()
-        .toString(36)
-        .slice(2)}.db`,
-    );
     const port = 20000 + Math.floor(Math.random() * 30000);
     const baseURL = `http://localhost:${port}`;
 
@@ -50,7 +39,7 @@ async function startServer() {
       {
         env: {
           ...process.env,
-          DATABASE_PATH: dbPath,
+          DATABASE_IN_MEMORY: "1",
           REGISTRATION_MODE: "open",
           BIND_ADDRESS: `127.0.0.1:${port}`,
           PUBLIC_BASE_URL: baseURL,
@@ -72,13 +61,10 @@ async function startServer() {
 
     try {
       await waitForServer(baseURL, child);
-      return { baseURL, child, dbPath };
+      return { baseURL, child };
     } catch (error) {
       // The server may have failed to bind (port collision). Clean up and retry.
       await killTree(child);
-      for (const suffix of ["", "-wal", "-shm"]) {
-        fs.rmSync(dbPath + suffix, { force: true });
-      }
       if (attempt === 4) {
         throw new Error(
           `server failed to start after retries; last stderr:\n${stderr}\n${error}`,

src/main.rs

@@ -42,6 +42,9 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         .init();
 
     let database_path = env::var("DATABASE_PATH").unwrap_or_else(|_| "sustenance.db".into());
+    let database_in_memory = env::var("DATABASE_IN_MEMORY")
+        .map(|value| value == "1" || value.eq_ignore_ascii_case("true"))
+        .unwrap_or(false);
     let bind_address = env::var("BIND_ADDRESS").unwrap_or_else(|_| "127.0.0.1:3000".into());
     // For loopback hosts, advertise `localhost` so WebAuthn works locally (browsers
     // reject IP addresses as RP IDs). Access the app via http://localhost:PORT.
@@ -69,7 +72,11 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     };
 
     // Build the adapters (ports) and wire them into application services.
-    let db = SqliteDatabase::open(&database_path).await?;
+    let db = if database_in_memory {
+        SqliteDatabase::open_in_memory().await?
+    } else {
+        SqliteDatabase::open(&database_path).await?
+    };
     let users: Arc<dyn UserRepository> = Arc::new(SqliteUserRepository);
     let sessions: Arc<dyn SessionRepository> = Arc::new(SqliteSessionRepository);
     let lists: Arc<dyn ListRepository> = Arc::new(SqliteListRepository);
@@ -163,6 +170,10 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         .with_graceful_shutdown(shutdown_signal())
         .await?;
     info!("shutdown complete; closing database");
+    // Explicitly close the pool so SQLite can checkpoint and remove the
+    // WAL/SHM sidecar files. Without this, the pool's background close task
+    // races with process exit and the sidecars can be left behind.
+    db.close().await;
     Ok(())
 }
 

src/sqlite.rs

@@ -39,26 +39,32 @@ impl SqliteDatabase {
         Ok(Self { pool })
     }
 
-    #[cfg(test)]
+    /// Opens an in-memory database. Every connection in the pool shares the same
+    /// in-memory database via a named shared-cache database, so the schema and
+    /// data are visible across the whole pool. Nothing is persisted to disk.
     pub async fn open_in_memory() -> DomainResult<Self> {
-        // A pool of `:memory:` connections would each get a separate database,
-        // so use a unique temporary file that shares the schema across the pool.
+        // A plain `:memory:` database is private to each connection, so a pool
+        // would get a separate database per connection. Use a uniquely-named
+        // shared-cache in-memory database instead so the whole pool shares one.
+        //
+        // The name must be unique per call: shared-cache in-memory databases are
+        // keyed by name, so two calls with the same name within a process would
+        // resolve to the same database and share state. This matters for the
+        // unit tests, which run many `open_in_memory()` calls in parallel within
+        // a single process and need isolation from each other. The counter makes
+        // each call unique. (Shared-cache and in-memory databases are per-process,
+        // so there is no cross-process collision to guard against.)
         use std::sync::atomic::{AtomicU64, Ordering};
         static COUNTER: AtomicU64 = AtomicU64::new(0);
         let unique = COUNTER.fetch_add(1, Ordering::Relaxed);
-        let path = std::env::temp_dir().join(format!(
-            "sustenance-test-{}-{}-{}.db",
-            std::process::id(),
-            now(),
-            unique
-        ));
-        let path = path.to_str().unwrap();
+        let filename = format!("file:sustenance-in-memory-{}", unique);
         let options = SqliteConnectOptions::new()
-            .filename(path)
-            .journal_mode(sqlx::sqlite::SqliteJournalMode::Wal)
+            .filename(filename)
+            .in_memory(true)
+            .shared_cache(true)
+            .journal_mode(sqlx::sqlite::SqliteJournalMode::Memory)
             .foreign_keys(true)
-            .busy_timeout(std::time::Duration::from_secs(5))
-            .create_if_missing(true);
+            .busy_timeout(std::time::Duration::from_secs(5));
         let pool = SqlitePool::connect_with(options).await.map_err(db_error)?;
         MIGRATOR.run(&pool).await.map_err(migrate_error)?;
         seed_default_categories(&pool).await?;
@@ -68,6 +74,14 @@ impl SqliteDatabase {
 }
 
 impl SqliteDatabase {
+    /// Closes the connection pool, waiting for all connections to be released
+    /// and closed. This lets SQLite checkpoint and remove the WAL/SHM sidecar
+    /// files on a clean shutdown; without it, the pool's background close task
+    /// races with process exit and the sidecars may be left behind.
+    pub async fn close(&self) {
+        self.pool.close().await;
+    }
+
     /// Runs `operation` inside a single transaction, committing on success and
     /// rolling back on error. Multiple repositories can participate in the same
     /// transaction so their writes commit together atomically.