Add speecht5 unit test

tests/pipelines.test.js

@@ -912,14 +912,29 @@ describe('Pipelines', () => {
     describe('Text-to-speech generation', () => {
 
         // List all models which will be tested
-        // TODO: add speecht5 test
         const models = [
+            'Xenova/speecht5_tts',
             'facebook/mms-tts-fra',
         ];
 
         it(models[0], async () => {
             let synthesizer = await pipeline('text-to-speech', m(models[0]));
 
+            let speaker_embeddings = 'https://huggingface.co/datasets/Xenova/transformers.js-docs/resolve/main/speaker_embeddings.bin';
+
+            { // Generate English speech
+                let output = await synthesizer('Hello, my dog is cute', { speaker_embeddings });
+                expect(output.audio.length).toBeGreaterThan(0);
+                expect(output.sampling_rate).toEqual(16000);
+            }
+
+            await transcriber.dispose();
+
+        }, MAX_TEST_EXECUTION_TIME);
+
+        it(models[1], async () => {
+            let synthesizer = await pipeline('text-to-speech', m(models[1]));
+
             { // Generate French speech
                 let output = await synthesizer('Bonjour');
                 expect(output.audio.length).toBeGreaterThan(0);