get rid of global notify (#5355)

* [toasts] get rid of notify globals, refactor messageToasts for use by entire app

* [remove notify] use arrow func in ajax call

* fix lint + tests

* actually fix tests from messageToast refactor

* add 'test:one' npm script

* debugger

* [toasts] convert bootstrap flash messages to toasts in explore + sqllab

* [toasts][tests] import from right file

superset/assets/spec/javascripts/messageToasts/components/Toast_spec.jsx

@@ -0,0 +1,43 @@
+import { Alert } from 'react-bootstrap';
+import React from 'react';
+import { shallow } from 'enzyme';
+import { describe, it } from 'mocha';
+import { expect } from 'chai';
+
+import mockMessageToasts from '../mockMessageToasts';
+import Toast from '../../../../src/messageToasts/components/Toast';
+
+describe('Toast', () => {
+  const props = {
+    toast: mockMessageToasts[0],
+    onCloseToast() {},
+  };
+
+  function setup(overrideProps) {
+    const wrapper = shallow(<Toast {...props} {...overrideProps} />);
+    return wrapper;
+  }
+
+  it('should render an Alert', () => {
+    const wrapper = setup();
+    expect(wrapper.find(Alert)).to.have.length(1);
+  });
+
+  it('should render toastText within the alert', () => {
+    const wrapper = setup();
+    const alert = wrapper.find(Alert).dive();
+
+    expect(alert.childAt(1).text()).to.equal(props.toast.text);
+  });
+
+  it('should call onCloseToast upon alert dismissal', done => {
+    const onCloseToast = id => {
+      expect(id).to.equal(props.toast.id);
+      done();
+    };
+    const wrapper = setup({ onCloseToast });
+    const handleClosePress = wrapper.instance().handleClosePress;
+    expect(wrapper.find(Alert).prop('onDismiss')).to.equal(handleClosePress);
+    handleClosePress(); // there is a timeout for onCloseToast to be called
+  });
+});