test: add "globalSetup" to ensure versions are downloaded before tests

Author: hasezoey

packages/mongodb-memory-server-core/jest.config.js

@@ -18,4 +18,5 @@ module.exports = {
     '<rootDir>/src/**/*.ts', // include all files, even files that have no tests yet (or are never called)
     '!<rootDir>/src/util/postinstallHelper.ts', // exclude this file, because it is only made for postInstall, not tests
   ],
+  globalSetup: '<rootDir>/src/__tests__/testUtils/globalSetup.ts',
 };

packages/mongodb-memory-server-core/src/__tests__/testUtils/globalSetup.ts

@@ -0,0 +1,13 @@
+import MongoBinary from '../../util/MongoBinary';
+import resolveConfig, { ResolveConfigVariables } from '../../util/resolveConfig';
+import { assertion, isNullOrUndefined } from '../../util/utils';
+
+export = async function globalSetup(): Promise<void> {
+  const defaultVersion = resolveConfig(ResolveConfigVariables.VERSION);
+  assertion(!isNullOrUndefined(defaultVersion), new Error('Default version is not defined'));
+  const versions = [defaultVersion, '4.0.3'];
+  // Ensure all required versions are downloaded for tests
+  for (const version of versions) {
+    await MongoBinary.getPath({ version });
+  }
+};