Setup UI testing (#720)

* default sequencer ui test

* default step ui test suite

* intermediate step ui test

* preview ui test suite

* url methods test suite

* add set url params method test suite

* argument call tests

* test directory refactor

* travis fix

test/spec/intermediateHtmlStepUi.spec.js

@@ -0,0 +1,19 @@
+describe('Intermediate step HTML', function() {
+
+  var IntermediateHtmlStepUi = require('../../examples/lib/intermediateHtmlStepUi')
+  var sequencer = require('../../src/ImageSequencer')()
+  var intermediateHtmlStepUi;
+
+  beforeEach(()=>{
+    intermediateHtmlStepUi = new IntermediateHtmlStepUi(sequencer)
+
+    spyOn(intermediateHtmlStepUi,'insertStep')
+
+    intermediateHtmlStepUi.insertStep()
+  })
+
+  it('insert step ui', function() {
+    expect(intermediateHtmlStepUi.insertStep).toHaveBeenCalled()
+  })
+
+})