fixing shake to open Dev Menu only work once

Summary:
Fixing issues https://github.com/facebook/react-native/issues/10588

This bug has been introduced during refactoring UIActionSheet to UIAlertController d368ebfab2 (diff-f78a84ff95f2bcee5a70d3accb504528)

**Test plan**

- shake to open DevMenu, choose random menu item, it should close DevMenu and after another shaking it should open again
Closes https://github.com/facebook/react-native/pull/10676

Differential Revision: D4168254

Pulled By: javache

fbshipit-source-id: 6e2935b765053a2b55809af357d2b6ea03e04e8b

Examples/UIExplorer/UIExplorerUnitTests/RCTDevMenuTests.m

@@ -0,0 +1,69 @@
+/**
+ * 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.
+ */
+
+#import <XCTest/XCTest.h>
+
+#import "RCTBridge.h"
+#import "RCTDevMenu.h"
+
+typedef void(^RCTDevMenuAlertActionHandler)(UIAlertAction *action);
+
+@interface RCTDevMenu ()
+
+- (RCTDevMenuAlertActionHandler)alertActionHandlerForDevItem:(RCTDevMenuItem *)item;
+
+@end
+
+@interface RCTDevMenuTests : XCTestCase
+
+@end
+
+@implementation RCTDevMenuTests
+{
+  RCTBridge *_bridge;
+}
+
+- (void)setUp
+{
+  [super setUp];
+
+  NSBundle *bundle = [NSBundle bundleForClass:[self class]];
+  _bridge = [[RCTBridge alloc] initWithBundleURL:[bundle URLForResource:@"TestBundle" withExtension:@"js"]
+                                  moduleProvider:nil
+                                   launchOptions:nil];
+}
+
+- (void)testShowCreatingActionSheet
+{
+  XCTAssertFalse([_bridge.devMenu isActionSheetShown]);
+  [_bridge.devMenu show];
+  XCTAssertTrue([_bridge.devMenu isActionSheetShown]);
+}
+
+
+- (void)testClosingActionSheetAfterAction
+{
+  for (RCTDevMenuItem *item in _bridge.devMenu.presentedItems) {
+    RCTDevMenuAlertActionHandler handler = [_bridge.devMenu alertActionHandlerForDevItem:item];
+    XCTAssertTrue([_bridge.devMenu isActionSheetShown]);
+
+    handler(nil);
+    XCTAssertFalse([_bridge.devMenu isActionSheetShown]);
+
+    [_bridge.devMenu show];
+    XCTAssertTrue([_bridge.devMenu isActionSheetShown]);
+  }
+}
+
+@end