code refactor

Reviewed-on: #26

crates/adapters/sqlite/tests/repositories/outbox_support.rs

@@ -0,0 +1,34 @@
+use std::str::FromStr;
+
+use sqlx::{
+    SqlitePool,
+    sqlite::{SqliteConnectOptions, SqlitePoolOptions},
+};
+
+pub async fn migrated_pool() -> SqlitePool {
+    let opts = SqliteConnectOptions::from_str("sqlite::memory:").unwrap();
+    let pool = SqlitePoolOptions::new()
+        .max_connections(1)
+        .connect_with(opts)
+        .await
+        .unwrap();
+    sqlite::migrate(&pool).await.unwrap();
+    pool
+}
+
+pub async fn count(pool: &SqlitePool, table: &str) -> i64 {
+    sqlx::query_scalar(&format!("SELECT COUNT(*) FROM {table}"))
+        .fetch_one(pool)
+        .await
+        .unwrap()
+}
+
+pub async fn fail_event_inserts(pool: &SqlitePool) {
+    sqlx::query(
+        "CREATE TRIGGER fail_event_insert BEFORE INSERT ON event_queue \
+         BEGIN SELECT RAISE(ABORT, 'enqueue failed'); END",
+    )
+    .execute(pool)
+    .await
+    .unwrap();
+}