Tests: Check if originalScriptCode is available

Fixes codesandbox#742

Author: CompuIves

packages/app/src/app/components/Preview/DevTools/Tests/TestDetails/ErrorDetails/index.js

@@ -64,7 +64,8 @@ const formatDiffMessage = (error: TestError, path: string) => {
   if (
     error.mappedErrors &&
     error.mappedErrors[0] &&
-    error.mappedErrors[0].fileName.endsWith(path)
+    error.mappedErrors[0].fileName.endsWith(path) &&
+    error.mappedErrors[0]._originalScriptCode
   ) {
     const mappedError = error.mappedErrors[0];
 

packages/app/src/app/components/Preview/DevTools/Tests/index.js

@@ -42,7 +42,7 @@ export type TestError = Error & {
       lineNumber: number,
       content: string,
       highlight: boolean,
-    }>,
+    }> | null,
   }>,
 };