Reduce read workers to improve test reliability

Author: simolus3

packages/node/tests/PowerSyncDatabase.test.ts

@@ -43,7 +43,14 @@ databaseTest('links powersync', async ({ database }) => {
   await database.get('select powersync_rs_version();');
 });
 
-databaseTest('runs queries on multiple threads', async ({ database }) => {
+tempDirectoryTest('runs queries on multiple threads', async ({ tmpdir }) => {
+  const database = new PowerSyncDatabase({
+    schema: AppSchema,
+    database: {
+      dbFilename: 'test.db',
+      dbLocation: tmpdir
+    }
+  });
   const threads = new Set<number>();
 
   const collectWorkerThreadId = async () => {
@@ -58,6 +65,7 @@ databaseTest('runs queries on multiple threads', async ({ database }) => {
   }
 
   const res = await Promise.all(queryTasks);
+  await database.close();
   expect(res).toHaveLength(10);
   expect([...threads]).toHaveLength(5);
 });

packages/node/tests/utils.ts

@@ -67,7 +67,8 @@ export async function createDatabase(
     schema: AppSchema,
     database: {
       dbFilename: 'test.db',
-      dbLocation: tmpdir
+      dbLocation: tmpdir,
+      readWorkerCount: 1
     },
     logger: defaultLogger,
     ...options