Rewrite SelectEventPlugin-test to test behavior using Public API (#11299)

packages/react-dom/src/events/__tests__/SelectEventPlugin-test.js

@@ -0,0 +1,106 @@
+/**
+ * Copyright (c) 2013-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @emails react-core
+ */
+
+'use strict';
+
+var React;
+var ReactDOM;
+
+describe('SelectEventPlugin', () => {
+  var container;
+
+  beforeEach(() => {
+    React = require('react');
+    ReactDOM = require('react-dom');
+
+    container = document.createElement('div');
+    document.body.appendChild(container);
+  });
+
+  afterEach(() => {
+    document.body.removeChild(container);
+    container = null;
+  });
+
+  // See https://github.com/facebook/react/pull/3639 for details.
+  it('does not get confused when dependent events are registered independently', () => {
+    var select = jest.fn();
+    var onSelect = event => select(event.currentTarget);
+
+    // Pass `onMouseDown` so React registers a top-level listener.
+    var node = ReactDOM.render(
+      <input type="text" onMouseDown={function() {}} />,
+      container,
+    );
+    node.focus();
+
+    // Trigger `mousedown` and `mouseup`. Note that
+    // React is not currently listening to `mouseup`.
+    node.dispatchEvent(
+      new MouseEvent('mousedown', {
+        bubbles: true,
+        cancelable: true,
+      }),
+    );
+    node.dispatchEvent(
+      new MouseEvent('mouseup', {
+        bubbles: true,
+        cancelable: true,
+      }),
+    );
+
+    // Now subscribe to `onSelect`.
+    ReactDOM.render(<input type="text" onSelect={select} />, container);
+    node.focus();
+
+    // This triggers a `select` event in our polyfill.
+    node.dispatchEvent(
+      new KeyboardEvent('keydown', {bubbles: true, cancelable: true}),
+    );
+
+    // Verify that it doesn't get "stuck" waiting for
+    // a `mouseup` event that it has "missed" because
+    // a top-level listener didn't exist yet.
+    expect(select.mock.calls.length).toBe(1);
+  });
+
+  it('should fire `onSelect` when a listener is present', () => {
+    var select = jest.fn();
+    var onSelect = event => {
+      expect(typeof event).toBe('object');
+      expect(event.type).toBe('select');
+      expect(event.target).toBe(node);
+      select(event.currentTarget);
+    };
+
+    var node = ReactDOM.render(
+      <input type="text" onSelect={onSelect} />,
+      container,
+    );
+    node.focus();
+
+    var nativeEvent = new MouseEvent('focus', {
+      bubbles: true,
+      cancelable: true,
+    });
+    node.dispatchEvent(nativeEvent);
+    expect(select.mock.calls.length).toBe(0);
+
+    nativeEvent = new MouseEvent('mousedown', {
+      bubbles: true,
+      cancelable: true,
+    });
+    node.dispatchEvent(nativeEvent);
+    expect(select.mock.calls.length).toBe(0);
+
+    nativeEvent = new MouseEvent('mouseup', {bubbles: true, cancelable: true});
+    node.dispatchEvent(nativeEvent);
+    expect(select.mock.calls.length).toBe(1);
+  });
+});