Added variants support

package.json

@@ -1,6 +1,6 @@
 {
   "name": "contentstack",
-  "version": "3.20.5",
+  "version": "3.21.0",
   "description": "Contentstack Javascript SDK",
   "homepage": "https://www.contentstack.com/",
   "author": {

src/core/modules/entry.js

@@ -342,6 +342,22 @@ export default class Entry {
         }
     }
 
+    /**
+     * @method Variants
+     * @memberOf Entry
+     * @param {String} uid - uid of the variants entry 
+     * @description An initializer is responsible for creating Variants Entry object
+     * @returns {Variants}
+     * @instance 
+     */
+    variants(variant_headers) {
+        if (Array.isArray(variant_headers) && variant_headers.length > 0) {
+            this.headers['x-cs-variant-uid'] = variant_headers.join(',')
+        }else{
+            this.headers['x-cs-variant-uid'] = variant_headers;
+        }
+        return this;
+     }
 
     /**
      * @method fetch

src/core/modules/query.js

@@ -790,6 +790,22 @@ export default class Query extends Entry {
         var options = Utils.mergeDeep(this.fetchOptions, fetchOptions);
         return Utils.sendRequest(Utils.mergeDeep({}, this), options);
     }
+    /**
+     * @method Variants
+     * @memberOf Query
+     * @param {String} uid - uid of the variants entry 
+     * @description An initializer is responsible for creating Variants Entry object
+     * @returns {Variants}
+     * @instance 
+     */
+    variants(variant_headers) {
+        if (Array.isArray(variant_headers) && variant_headers.length > 0) {
+            this.headers['x-cs-variant-uid'] = variant_headers.join(',')
+        }else{
+            this.headers['x-cs-variant-uid'] = variant_headers;
+        }
+        return this;
+    }
 
      /**
      * @method findOne

test/entry/find.js

@@ -1658,4 +1658,19 @@ test('CT Taxonomies Query: Get Entries With Taxonomy Terms Parent and Excluding
             assert.fail("CT Taxonomies Query: Get Entries With Taxonomy Terms Parent and Excluding the term itself ($above, level)");
             assert.end();
         })
-})
+})
+test('Variants in entry', function (t) {
+    let Query = Stack.ContentType('source').Query();
+    Query
+        .Variants('variant_entry_1', 'variant_entry_2')
+        .toJSON()
+        .find()
+        .then(entries => {
+            assert.ok(entries[0].length, 'Variant entries present in the resultset');
+            assert.end();
+        }, err => {
+            console.error("error :", err);
+            assert.fail("Variant Entries are not present in the CT");
+            assert.end();
+        })
+});