Electron export test #3376 (#3512)

* electron export test #3376

* typo

* increase timeout

src/lib/exportSave.ts

@@ -14,6 +14,15 @@ const save_ = async (file: ModelingAppFile) => {
         extensions.push(extension)
       }
 
+      if (!(window as any).playwrightSkipFilePicker) {
+        // skip file picker, save to default location
+        await window.electron.writeFile(
+          file.name,
+          new Uint8Array(file.contents)
+        )
+        return
+      }
+
       // Open a dialog to save the file.
       const filePathMeta = await window.electron.save({
         defaultPath: file.name,