chore(server): move server tests folder (#9614)

packages/backend/server/src/__tests__/config.spec.ts

@@ -0,0 +1,39 @@
+import { TestingModule } from '@nestjs/testing';
+import test from 'ava';
+
+import { Config, ConfigModule } from '../base/config';
+import { createTestingModule } from './utils';
+
+let config: Config;
+let module: TestingModule;
+test.beforeEach(async () => {
+  module = await createTestingModule({}, false);
+  config = module.get(Config);
+});
+
+test.afterEach.always(async () => {
+  await module.close();
+});
+
+test('should be able to get config', t => {
+  t.true(typeof config.server.host === 'string');
+  t.is(config.projectRoot, process.cwd());
+  t.is(config.NODE_ENV, 'test');
+});
+
+test('should be able to override config', async t => {
+  const module = await createTestingModule({
+    imports: [
+      ConfigModule.forRoot({
+        server: {
+          host: 'testing',
+        },
+      }),
+    ],
+  });
+  const config = module.get(Config);
+
+  t.is(config.server.host, 'testing');
+
+  await module.close();
+});