test: add server specific test to site locale

packages/core/src/constants/index.spec.ts

@@ -1,8 +1,13 @@
-import { FieldTypePrefixes } from '.';
+import { FieldTypePrefixes, NOOP } from '.';
 
 test('Field Prefixes are unique', () => {
   const prefixes = Object.values(FieldTypePrefixes);
   const uniquePrefixes = new Set(prefixes);
 
   expect(uniquePrefixes.size).toBe(prefixes.length);
 });
+
+test('NOOP does nothing', () => {
+  expect(NOOP.length).toBe(0);
+  expect(NOOP()).toBeUndefined();
+});

packages/core/src/i18n/getSiteLocale.server.spec.ts

@@ -0,0 +1,8 @@
+// @vitest-environment node
+import { getSiteLocale } from './getSiteLocale';
+import { expect } from 'vitest';
+
+test('test', () => {
+  expect(typeof window).toBe('undefined');
+  expect(getSiteLocale()).toBe('en-US');
+});