add failing test for #988

tests/jsPsych/functions-as-parameters.test.js

@@ -0,0 +1,126 @@
+const root = '../../';
+const utils = require('../testing-utils.js');
+
+beforeEach(function(){
+  require(root + 'jspsych.js');
+  require(root + 'plugins/jspsych-html-keyboard-response.js');
+  require(root + 'plugins/jspsych-survey-text.js');
+});
+
+describe('standard use of function as parameter', function(){
+  test('function value is used as parameter', function(){
+    var trial = {
+      type: 'html-keyboard-response',
+      stimulus: function(){
+        return 'foo'
+      }
+    }
+
+    jsPsych.init({
+      timeline: [trial]
+    })
+
+    expect(jsPsych.getDisplayElement().innerHTML).toMatch('foo');
+    utils.pressKey(32);
+  });
+
+  test('function evaluates at runtime', function(){
+    var x = 'foo';
+
+    var trial = {
+      type: 'html-keyboard-response',
+      stimulus: function(){
+        return x;
+      }
+    }
+
+    x = 'bar';
+
+    jsPsych.init({
+      timeline: [trial]
+    })
+
+    expect(jsPsych.getDisplayElement().innerHTML).toMatch('bar');
+    utils.pressKey(32);
+  })
+})
+
+describe('data as function', function(){
+  test('entire data object can be function', function(){
+         
+    var trial = {
+      type: 'html-keyboard-response',
+      stimulus: 'foo',
+      data: function(){
+        return {x:1}
+      }
+    }
+
+    jsPsych.init({
+      timeline: [trial]
+    })
+
+    utils.pressKey(32);
+    expect(jsPsych.data.get().values()[0].x).toBe(1)    
+  })
+
+  test('single parameter of data object can be function', function(){
+         
+    var trial = {
+      type: 'html-keyboard-response',
+      stimulus: 'foo',
+      data: {
+        x: function() { return 1; }
+      }
+    }
+
+    jsPsych.init({
+      timeline: [trial]
+    })
+
+    utils.pressKey(32);
+    expect(jsPsych.data.get().values()[0].x).toBe(1)    
+  })
+})
+
+describe('nested parameters as functions', function(){
+  
+
+  test('entire parameter can be a function', function(){
+   
+    var trial = {
+			type: 'survey-text',
+			questions: function(){
+        return [{prompt: "How old are you?"}, {prompt: "Where were you born?"}]
+      }
+		}
+
+		jsPsych.init({
+			timeline: [trial]
+		});
+
+		expect(jsPsych.getDisplayElement().querySelectorAll('p.jspsych-survey-text').length).toBe(2);
+		
+		utils.clickTarget(document.querySelector('#jspsych-survey-text-next'));
+
+		expect(jsPsych.getDisplayElement().innerHTML).toBe('');
+  })
+
+  test('nested parameter can be a function', function(){
+   
+    var trial = {
+			type: 'survey-text',
+			questions: [{prompt: function(){ return "foo"; }}, {prompt: "bar"}]
+		}
+
+		jsPsych.init({
+			timeline: [trial]
+		});
+
+		expect(document.querySelector('#jspsych-survey-text-0 p.jspsych-survey-text').innerHTML).toBe('foo');
+		
+		utils.clickTarget(document.querySelector('#jspsych-survey-text-next'));
+
+		expect(jsPsych.getDisplayElement().innerHTML).toBe('');
+  })
+})