init

scratch-vm/test/unit/tw_translate.js

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+const {test} = require('tap');
+
+// Simulate the network being down or filtered
+// Run this before fetch-with-timeout.js is gets loaded.
+global.fetch = () => Promise.reject(new Error('Simulated network error'));
+
+const Scratch3TranslateBlocks = require('../../src/extensions/scratch3_translate/index');
+
+// Node 21 and later defines a navigator object, but we want to override that for the test
+Object.defineProperty(global, 'navigator', {
+    value: {
+        language: 'en-US'
+    }
+});
+
+// Translate tries to access AbortController from window, but does not require it to exist.
+global.window = {};
+
+test('translate returns original string on network error', t => {
+    t.plan(1);
+
+    const extension = new Scratch3TranslateBlocks();
+    extension.getTranslate({WORDS: 'My message 123123', LANGUAGE: 'es'})
+        .then(message => {
+            t.equal(message, 'My message 123123');
+            t.end();
+        });
+});