Add sequencer.getSteps() (#777)

* create getSteps() and test it

* Adds test with new sequencer instance and updated Readme

README.md

@@ -493,6 +493,16 @@ sequencer.insertSteps({
 ```
 return value: **`sequencer`** (To allow method chaining)
 
+## Fetching current steps
+
+The `getSteps` method can be used to get the array of current steps in `this` instance of sequencer.For example
+
+```js
+sequencer.getSteps()
+```
+
+returns an array of steps associated with the current sequencer.
+
 ## Saving Sequences
 
 IMAGE SEQUENCER supports saving a sequence of modules and their associated settings in a simple string syntax. These sequences can be saved in the local storage inside the browser and inside a JSON file in node.js. sequences can be saved in node context using the CLI option

src/ImageSequencer.js

@@ -203,6 +203,16 @@ ImageSequencer = function ImageSequencer(options) {
     return require('./ReplaceImage')(this, selector, steps, options);
   }
 
+  //returns the steps added
+  function getSteps(){
+    var steps;
+    if(arguments[0])
+    steps= this.images.test.steps;
+    else
+    steps = this.images.image1.steps;
+    return [...steps];
+  }
+
   function setUI(UI) {
     this.events = require('./ui/UserInterface')(UI);
   }
@@ -442,6 +452,7 @@ ImageSequencer = function ImageSequencer(options) {
     createMetaModule: require('./util/createMetaModule'),
     saveSequence: saveSequence,
     loadModules: loadModules,
+    getSteps:getSteps,
 
     //other functions
     log: log,

test/core/modules/image-sequencer.js

@@ -165,6 +165,24 @@ test('insertSteps({image: {index: index, name: "module", o: options} }) inserts
 });
 
 
+test('getSteps() returns correct array of steps', function(t){
+  var sequencer = ImageSequencer({ ui: false });
+  sequencer.loadImages('test', red);
+  sequencer.addSteps(['blur','invert']);
+  var stepsArray = sequencer.getSteps('test');  
+  t.equal(stepsArray.length, sequencer.images.test.steps.length, "getSteps() returns correct length of steps");
+  var flag=0;
+  for (var i = 0; i<sequencer.images.test.steps.length; i++){
+    if(stepsArray[i].options.name==(sequencer.images.test.steps[i].options.name))
+    continue
+    else
+    flag=1;
+  }
+  t.equal(flag, 0, "getSteps() returns correct array of steps");
+  t.end();
+})
+
+
 test('run() runs the sequencer and returns output to callback', function(t) {
   sequencer.run({ mode: 'test' }, function(out) {
     t.equal(typeof (sequencer.images.test.steps[sequencer.images.test.steps.length - 1].output), "object", "Output is Generated");