Tests: Remove queue overrides / limit concurrency (#433)

Ensure all backend variations are properly end-to-end tested
by removing in-memory queue override; this currently
requires limiting test concurrency to 1 because tests are
currently sharing backend services.

server/run-tests.sh

@@ -2,7 +2,7 @@
 
 # Run tests with various configurations:
 
-TEST_COMMAND="cargo test --all --all-features --all-targets"
+TEST_COMMAND="cargo test --all --all-features --all-targets -- --test-threads=1"
 
 # Common variables:
 export DATABASE_URL="postgresql://postgres:postgres@localhost:5432/postgres"

server/svix-server/tests/utils/mod.rs

@@ -212,12 +212,7 @@ pub fn get_default_test_config() -> ConfigurationInner {
     let _ = dotenv::dotenv();
     let cfg = svix_server::cfg::load().unwrap();
 
-    // Change the queue type to in-memory. This is necessary so test workers don't pick up messages
-    // from other tests whose threads then abort at the end of a test before associated database
-    // transactions are complete.
-    let mut cfg = cfg.as_ref().clone();
-    cfg.queue_type = svix_server::cfg::QueueType::Memory;
-    cfg
+    cfg.as_ref().clone()
 }
 
 pub fn start_svix_server() -> (TestClient, tokio::task::JoinHandle<()>) {