fix: should load json file correctly (#702)

Author: 9aoy

e2e/test-api/json.test.ts

@@ -0,0 +1,12 @@
+import { expect, it } from '@rstest/core';
+
+it('should test json file correctly', async () => {
+  const jsonPath = './test.json';
+  // will external and load json file in runtime
+  const json = await import(jsonPath);
+  // will bundle json file during build
+  const jsonA = await import('./test.json');
+
+  expect(json.value).toBe(123);
+  expect(json).toEqual(jsonA);
+});

e2e/test-api/test.json

@@ -0,0 +1,3 @@
+{
+  "value": 123
+}

packages/core/src/runtime/worker/loadModule.ts

@@ -82,6 +82,21 @@ const defineRstestDynamicImport =
       delete importAttributes.with.rstest;
     }
 
+    if (modulePath.endsWith('.json')) {
+      // const json = await import(jsonPath);
+      // should return { default: jsonExports, ...jsonExports }
+      const importedModule = await import(modulePath, {
+        with: { type: 'json' },
+      });
+
+      return returnModule
+        ? asModule(importedModule.default, importedModule.default)
+        : {
+            ...importedModule.default,
+            default: importedModule.default,
+          };
+    }
+
     const importedModule = await import(modulePath, importAttributes);
 
     if (