RUST-1231 Run tests using DEFAULT_MAX_POOL_SIZE (#980)

src/client/options.rs

@@ -802,7 +802,7 @@ pub struct ConnectionString {
     /// `max_pool_size` connections are checked out, the operation will block until an in-progress
     /// operation finishes and its connection is checked back into the pool.
     ///
-    /// The default value is 100.
+    /// The default value is 10.
     pub max_pool_size: Option<u32>,
 
     /// The minimum number of connections that should be available in a server's connection pool at

src/cmap.rs

@@ -46,7 +46,7 @@ use worker::ConnectionPoolWorker;
 #[cfg(test)]
 use crate::runtime::WorkerHandle;
 
-const DEFAULT_MAX_POOL_SIZE: u32 = 10;
+pub(crate) const DEFAULT_MAX_POOL_SIZE: u32 = 10;
 
 /// A pool of connections implementing the CMAP spec.
 /// This type is actually a handle to task that manages the connections and is cheap to clone and

src/sdam/description/topology/server_selection/test/in_window.rs

@@ -6,6 +6,7 @@ use semver::VersionReq;
 use serde::Deserialize;
 
 use crate::{
+    cmap::DEFAULT_MAX_POOL_SIZE,
     coll::options::FindOptions,
     error::Result,
     event::cmap::CmapEvent,
@@ -216,10 +217,9 @@ async fn load_balancing_test() {
     let mut handler = EventHandler::new();
     let mut subscriber = handler.subscribe();
     let mut options = CLIENT_OPTIONS.get().await.clone();
-    let max_pool_size = 10;
+    let max_pool_size = DEFAULT_MAX_POOL_SIZE;
     let hosts = options.hosts.clone();
     options.local_threshold = Duration::from_secs(30).into();
-    options.max_pool_size = Some(max_pool_size);
     options.min_pool_size = Some(max_pool_size);
     let client = TestClient::with_handler(Some(Arc::new(handler.clone())), options).await;
 

src/test.rs

@@ -56,8 +56,6 @@ use crate::{
 };
 use std::{fs::read_to_string, str::FromStr};
 
-const MAX_POOL_SIZE: u32 = 100;
-
 lazy_static! {
     pub(crate) static ref CLIENT_OPTIONS: AsyncOnce<ClientOptions> = AsyncOnce::new(async {
         let mut options = ClientOptions::parse_uri(&*DEFAULT_URI, None).await.unwrap();
@@ -113,9 +111,6 @@ lazy_static! {
 }
 
 pub(crate) fn update_options_for_testing(options: &mut ClientOptions) {
-    if options.max_pool_size.is_none() {
-        options.max_pool_size = Some(MAX_POOL_SIZE);
-    }
     if options.server_api.is_none() {
         options.server_api = SERVER_API.clone();
     }