add: SpeechSynthesis.getSpeakTest test

Author: puemos

lib/speechSynthesis.js

@@ -1,6 +1,6 @@
 import { isString } from './utils';
 
-const getSpeakText = (step) => {
+export const getSpeakText = (step) => {
   const { message, metadata = {} } = step;
   if (isString(metadata.speak)) {
     return metadata.speak;

tests/lib/speechSynthesis.spec.js

@@ -0,0 +1,28 @@
+import { describe, it } from 'mocha';
+import { expect } from 'chai';
+import { getSpeakText, speakFn } from '../../lib/speechSynthesis';
+
+describe('SpeechSynthesis', () => {
+  describe('getSpeakTest', () => {
+    it('should get speak from metadata', () => {
+      const text = getSpeakText({ metadata: { speak: 'test' } });
+      expect(text).to.eql('test');
+    });
+    it('should get speak from metadata before message', () => {
+      const text = getSpeakText({ message: 'message', metadata: { speak: 'test' } });
+      expect(text).to.eql('test');
+    });
+    it('should get speak from message if metadata.speak is empty', () => {
+      const text = getSpeakText({ message: 'message', metadata: { speak: null } });
+      expect(text).to.eql('message');
+    });
+    it('should get speak from message', () => {
+      const text = getSpeakText({ message: 'message' });
+      expect(text).to.eql('message');
+    });
+    it('should fallback to empty string', () => {
+      const text = getSpeakText({});
+      expect(text).to.eql('');
+    });
+  });
+});