test: ✅ add a require + context module test case

packages/preset-umi/fixtures/prepare-build/normal/context2/css.css

@@ -0,0 +1,3 @@
+.red{
+  color:red;
+}

packages/preset-umi/fixtures/prepare-build/normal/context2/index.ts

@@ -0,0 +1,3 @@
+export function loadByRequire(f: string): any {
+  return require(`./${f}`);
+}

packages/preset-umi/fixtures/prepare-build/normal/index.ts

@@ -8,8 +8,11 @@ import './a.ext-must-not-exist';
 import './a.html';
 // relative imports
 import { bar } from './bar/bar';
+import { load } from './context/context';
+import { loadByRequire } from './context2/';
 import { foo } from './foo';
-import { load } from './context/context'
+
 console.log(foo);
 console.log(bar);
-console.log(load)
+console.log(load);
+console.log(loadByRequire);