fix setOption function bug and wirte a test for it.

it should return the context.

Author: dev-javascript

src/utils/api/api.factory.js

@@ -75,7 +75,8 @@ const _apiProps = {
     return this.optionsManager.getOption(name);
   },
   setOption: function (name, value) {
-    return this.optionsManager.setOption(name, value);
+    this.optionsManager.setOption(name, value);
+    return this;
   },
   getPreviousData: function () {
     return this.helper.getCopyState(this.previousState);

src/utils/api/api.factory.test.js

@@ -478,6 +478,23 @@ describe('Api.prototype.setTab : ', () => {
       obj.optionsManager.validatePanelComponent,
     );
   });
+  test('it should return the context', () => {
+    obj.optionsManager.validateObjectiveTabData = jest.fn(() => obj.optionsManager);
+    obj.optionsManager.validatePanelComponent = jest.fn(() => obj.optionsManager);
+    const result = obj.setTab('1', {title: 'c'});
+    expect(result).toEqual(obj);
+  });
+});
+describe('Api.prototype.setOption : ', () => {
+  test('it should call optionsManager.setOption internally', () => {
+    obj.optionsManager.setOption = jest.fn(() => obj.optionsManager);
+    obj.setOption('isVertical', true);
+    expect(obj.optionsManager.setOption.mock.calls.length).toBe(1);
+  });
+  test('it should return the context', () => {
+    const result = obj.setOption('isVertical', true);
+    expect(result).toEqual(obj);
+  });
 });
 describe('Api.prototype._subscribeSelectedTabsHistory : ', () => {
   test('it should call "on" method', () => {