[ReactNative] Test case for text update bug

Libraries/Text/TextUpdateTest.js

@@ -0,0 +1,64 @@
+/**
+ * The examples provided by Facebook are for non-commercial testing and
+ * evaluation purposes only.
+ *
+ * Facebook reserves all rights not expressly granted.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL
+ * FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * @providesModule TextUpdateTest
+ * @flow
+ */
+'use strict';
+
+var React = require('react-native');
+var TimerMixin = require('react-timer-mixin');
+var {
+  NativeModules,
+  StyleSheet,
+  Text,
+} = React;
+
+var MIX_TYPES = false; // TODO(#6916648): fix bug and set true
+
+var TestManager = NativeModules.TestManager || NativeModules.SnapshotTestManager;
+
+var TextUpdateTest = React.createClass({
+  mixins: [TimerMixin],
+  getInitialState: function() {
+    return {seeMore: true};
+  },
+  componentDidMount: function() {
+    this.requestAnimationFrame(
+      () => this.setState(
+        {seeMore: false},
+        TestManager.markTestCompleted
+      )
+    );
+  },
+  render: function() {
+    var extraText = MIX_TYPES ? 'raw text' : <Text>wrapped text</Text>;
+    return (
+      <Text
+        style={styles.container}
+        onPress={() => this.setState({seeMore: !this.state.seeMore})}>
+        <Text>Tap to see more (bugs)...</Text>
+        {this.state.seeMore && extraText}
+      </Text>
+    );
+  },
+});
+
+var styles = StyleSheet.create({
+  container: {
+    margin: 10,
+    marginTop: 100,
+  },
+});
+
+module.exports = TextUpdateTest;