EG test for sessionStorage sharing.

ios/chrome/browser/web/window_open_by_dom_egtest.mm

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import <EarlGrey/EarlGrey.h>
 
 #import "base/test/ios/wait_util.h"
 #include "components/content_settings/core/common/content_settings.h"
 #include "ios/chrome/test/app/settings_test_util.h"
 #import "ios/chrome/test/app/tab_test_util.h"
@@ skipping 42 matching lines @@
   AssertMainTabCount(1);
 }
 
 // Tests that opening a link with target=_blank which then immediately closes
 // itself works.
 - (void)testLinkWithBlankTargetWithImmediateClose {
   TapWebViewElementWithId("webScenarioWindowOpenBlankTargetWithImmediateClose");
   AssertMainTabCount(1);
 }
 
+// Tests that |sessionStorage| content is available for windows open by DOM via

[baxley, 2017/02/03 15:23:38]

nit: I don't quite understand "windows open by DOM", should it be "windows
opened by DOM"? Or are these technical terms that should be written that way?

[Eugene But (OOO till 7-30), 2017/02/03 19:04:23]

Yes, it should be "windows opened by DOM". Done.

+// |target="_blank"| links.
+// TODO(crbug.com/681434): Enable this test.
+- (void)DISABLED_testLinkWithBlankTargetSessionStorage {
+  using chrome_test_util::ExecuteJavaScript;
+
+  NSError* error = nil;
+  ExecuteJavaScript(@"sessionStorage.setItem('key', 'value');", &error);
+  GREYAssert(!error, @"Error during script execution: %@", error);
+
+  TapWebViewElementWithId("webScenarioWindowOpenSamePageWithBlankTarget");
+  AssertMainTabCount(2);
+  [[EarlGrey selectElementWithMatcher:WebViewContainingText("Expected result")]
+      assertWithMatcher:grey_notNil()];
+
+  id value = ExecuteJavaScript(@"sessionStorage.getItem('key');", &error);
+  GREYAssert(!error, @"Error during script execution: %@", error);
+  GREYAssert([value isEqual:@"value"], @"sessionStorage is not shared");
+}
+
 // Tests a link with target="_blank".
 - (void)testLinkWithBlankTarget {
   TapWebViewElementWithId("webScenarioWindowOpenRegularLink");
   AssertMainTabCount(2);
 }
 
 // Tests a link with target="_blank" multiple times.
 - (void)testLinkWithBlankTargetMultipleTimes {
   TapWebViewElementWithId("webScenarioWindowOpenRegularLinkMultipleTimes");
   AssertMainTabCount(2);
@@ skipping 90 matching lines @@
       assertWithMatcher:grey_notNil()];
 }
 
 // Tests that closing the current window using DOM fails.
 - (void)testCloseWindowNotOpenByDOM {
   TapWebViewElementWithId("webScenarioWindowClose");
   AssertMainTabCount(1);
 }
 
 @end