add test case for #628

tests/jsPsych/default-parameters.test.js

@@ -0,0 +1,30 @@
+const root = '../../';
+const utils = require('../testing-utils.js');
+
+beforeEach(function(){
+  require(root + 'jspsych.js');
+  require(root + 'plugins/jspsych-survey-text.js');
+});
+
+describe('nested defaults', function(){
+    test('work in basic situation', function(){
+        var t = {
+            type: 'survey-text',
+            questions: [
+                {
+                    prompt: 'Question 1.'
+                },
+                {
+                    prompt: 'Question 2.'
+                }
+            ]
+        }
+
+        jsPsych.init({timeline: [t]})
+
+        var display = jsPsych.getDisplayElement();
+
+        expect(display.querySelector('input').placeholder).toBe("")
+        expect(display.querySelector('input').size).toBe(40)
+    });
+})