add test for diff

packages/cli/src/commands/translate.ts

@@ -77,7 +77,7 @@ export async function translate(targetLocale?: string, force: boolean = false) {
 
           const adapter = await getTranslator(format);
           if (!adapter) {
-            throw new Error(`No available adapter for format: ${format}`);
+            throw new Error(`No available translator for format: ${format}`);
           }
 
           const options: PromptOptions = {

packages/cli/test/js.test.ts

@@ -8,7 +8,7 @@ import { javascript } from "../src/translators/js.js";
 
 const dir = path.dirname(fileURLToPath(import.meta.url));
 
-test("JSON adapter: new", async () => {
+test("JavaScript adapter: new", async () => {
   const result = await javascript.onNew({
     config: {} as unknown as Config,
     content: await readFile(path.join(dir, "resources/js-new.js")).then((res) =>
@@ -42,3 +42,39 @@ test("JSON adapter: new", async () => {
 
   await expect(result.content).toMatchFileSnapshot("snapshots/js-new.js");
 });
+
+test("JavaScript adapter: diff", async () => {
+  const result = await javascript.onUpdate({
+    config: {} as unknown as Config,
+    content: await readFile(path.join(dir, "resources/js-diff.js")).then((res) =>
+      res.toString(),
+    ),
+    previousContent: (await readFile(path.join(dir, 'resources/js-diff.previous.js'))).toString(),
+    previousTranslation: (await readFile(path.join(dir, 'resources/js-diff.translated.js'))).toString(),
+    format: "js",
+    contentLocale: "en",
+    targetLocale: "cn",
+    model: new MockLanguageModelV1({
+      defaultObjectGenerationMode: "json",
+      async doGenerate(v) {
+        await expect(
+          (v.prompt.at(-1) as any).content[0].text,
+        ).toMatchFileSnapshot("snapshots/js-diff.prompt.txt");
+
+        return {
+          rawCall: { rawPrompt: null, rawSettings: {} },
+          finishReason: "stop",
+          usage: { promptTokens: 10, completionTokens: 20 },
+          text: JSON.stringify([
+            "\"title\"",
+            '"Updated"',
+            "`Updated\nUpdated`",
+            "`Updated ${Date.now()}`",
+          ]),
+        };
+      },
+    }),
+  });
+
+  await expect(result.content).toMatchFileSnapshot("snapshots/js-diff.js");
+});

packages/cli/test/resources/js-diff.js

@@ -0,0 +1,11 @@
+
+export default {
+    "title": "Getting Stopped",
+    description: 'Before you begin, make sure you have the following:\nA GitHub account',
+
+    nested: {
+        content: `Explore ideas and examples of
+what you can build with the Midday API`
+    },
+    dynamic: `the current time is not ${Date.now()}`
+}

packages/cli/test/resources/js-diff.previous.js

@@ -0,0 +1,10 @@
+
+export default {
+    "title": "Introduction",
+    description: 'Before you begin, make sure you have the following:\nA GitHub account',
+    nested: {
+        content: `You can self-host Midday on your own cloud infrastructure for greater control over your data.
+        This guide will walk you through the entire process of setting up Midday.`
+    },
+    dynamic: `the current time is ${Date.now()}`
+}

packages/cli/test/resources/js-diff.translated.js

@@ -0,0 +1,10 @@
+
+export default {
+    "title": "Translated",
+    description: 'Translated\nTranslated',
+    nested: {
+        content: `Translated
+        Translated`
+    },
+    dynamic: `Translated ${Date.now()}`
+}

packages/cli/test/snapshots/js-diff.js

@@ -0,0 +1,10 @@
+
+export default {
+    "title": "Updated",
+    description: 'Translated\nTranslated',
+    nested: {
+        content: `Updated
+Updated`
+    },
+    dynamic: `Updated ${Date.now()}`
+}

packages/cli/test/snapshots/js-diff.prompt.txt

@@ -0,0 +1,31 @@
+You are a professional translator working with JS files.
+
+Task: Translate the content below from en to cn.
+
+Translation Requirements:
+- Maintain exact file structure, indentation, and formatting
+- Provide natural, culturally-adapted translations that sound native
+- Keep all technical identifiers unchanged
+- Keep consistent capitalization, spacing, and line breaks
+- Respect existing whitespace and newline patterns
+- Never add space before a ! or ?
+- Preserve all object/property keys, syntax characters, and punctuation marks exactly
+- Only translate text content within quotation marks
+
+A list of javascript codeblocks, return the translated javascript string in a JSON array of string:
+```js
+"title"
+```
+
+```js
+"Getting Stopped"
+```
+
+```js
+`Explore ideas and examples of
+what you can build with the Midday API`
+```
+
+```js
+`the current time is not ${Date.now()}`
+```