Added tests for getEventTarget

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

@@ -0,0 +1,54 @@
+/**
+ * Copyright (c) 2016-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 getEventTarget = require('../getEventTarget').default;
+
+describe('getEventTarget', () => {
+  describe('when target is present in nativeEvent', () => {
+    it('returns target', () => {
+      var target = document.createElement('div');
+      expect(getEventTarget({target: target})).toBe(target);
+    });
+  });
+
+  describe('when srcElement is present in nativeEvent', () => {
+    it('returns srcElement', () => {
+      var target = document.createElement('div');
+      expect(getEventTarget({srcElement: target})).toBe(target);
+    });
+  });
+
+  describe('when neither target nor srcElement is present in nativeEvent', () => {
+    it('returns the window object', () => {
+      expect(getEventTarget({})).toBe(window);
+    });
+  });
+
+  describe('when correspondingUseElement is present in target in nativeEvent', () => {
+    it('returns srcElement', () => {
+      var correspondingUseElement = document.createElement('div');
+      expect(
+        getEventTarget({
+          target: {correspondingUseElement: correspondingUseElement},
+        }),
+      ).toBe(correspondingUseElement);
+    });
+  });
+
+  describe('when target is a text node', () => {
+    it('returns the parent element', () => {
+      var parent = document.createElement('div');
+      var child = document.createTextNode('');
+      parent.appendChild(child);
+      expect(getEventTarget({target: child})).toBe(parent);
+    });
+  });
+});