test: add tests for languages with unsupported write parameters

Author: jason-gardella-deepl

tests/rephraseText.test.ts

@@ -4,7 +4,7 @@
 
 import { exampleText, makeDeeplClient, testTimeout, withRealServer } from './core';
 
-import { WritingTone, WritingStyle } from './../src/deeplClient';
+import { WritingStyle, WritingTone } from './../src/deeplClient';
 
 describe('rephrase text', () => {
     it('should rephrase a single text', async () => {
@@ -22,6 +22,34 @@ describe('rephrase text', () => {
         await expect(deeplClientPromise).rejects.toThrow(/Value for 'target_lang' not supported/);
     });
 
+    it('should throw an error for unsupported tone', async () => {
+        const deeplClient = makeDeeplClient();
+        const deeplClientPromise = deeplClient.rephraseText(
+            exampleText.de,
+            'es',
+            null,
+            WritingTone.CONFIDENT,
+        );
+        await expect(deeplClientPromise).rejects.toBeInstanceOf(Error);
+        await expect(deeplClientPromise).rejects.toThrow(
+            /Language Spanish does not support setting a tone/,
+        );
+    });
+
+    it('should throw an error for invalid writing_style parameter', async () => {
+        const deeplClient = makeDeeplClient();
+        const deeplClientPromise = deeplClient.rephraseText(
+            exampleText.de,
+            'es',
+            WritingStyle.BUSINESS,
+            null,
+        );
+        await expect(deeplClientPromise).rejects.toBeInstanceOf(Error);
+        await expect(deeplClientPromise).rejects.toThrow(
+            /Language Spanish does not support setting a writing style/,
+        );
+    });
+
     withRealServer(
         'should rephrase with style and tone',
         async () => {