Save modal component for explore v2 (#1612)

* Added specs for SaveModal

* Move datasource_id and datasource_name to form_data

* Add comments

* Deleted redundant fetchDashboard

* Replcae has_key for python3

* More react and less jquery

* Added alert for save slice

* Small changes based on comments

* Use react bootstrap

superset/assets/spec/javascripts/explorev2/components/SaveModal_spec.js

@@ -0,0 +1,36 @@
+import React from 'react';
+import { expect } from 'chai';
+import { describe, it, beforeEach } from 'mocha';
+import { shallow } from 'enzyme';
+import { defaultFormData } from '../../../../javascripts/explorev2/stores/store';
+import { SaveModal } from '../../../../javascripts/explorev2/components/SaveModal';
+import { Modal, Button, Radio } from 'react-bootstrap';
+import sinon from 'sinon';
+
+const defaultProps = {
+  can_edit: true,
+  onHide: () => ({}),
+  actions: {
+    saveSlice: sinon.spy(),
+  },
+  form_data: defaultFormData,
+  datasource_id: 1,
+  datasource_name: 'birth_names',
+  datasource_type: 'table',
+  user_id: 1,
+};
+
+describe('SaveModal', () => {
+  let wrapper;
+
+  beforeEach(() => {
+    wrapper = shallow(<SaveModal {...defaultProps} />);
+  });
+
+  it('renders a Modal with 7 inputs and 2 buttons', () => {
+    expect(wrapper.find(Modal)).to.have.lengthOf(1);
+    expect(wrapper.find('input')).to.have.lengthOf(2);
+    expect(wrapper.find(Button)).to.have.lengthOf(2);
+    expect(wrapper.find(Radio)).to.have.lengthOf(5);
+  });
+});