CWVWebView integration test for state restoration.

ios/web_view/test/chrome_web_view_restorable_state_inttest.mm

+// Copyright 2017 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 <ChromeWebView/ChromeWebView.h>
+
+#import "ios/web_view/test/chrome_web_view_test.h"
+#include "testing/gtest_mac.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+namespace {
+
+// Creates web view for testing.
+CWVWebView* CreateWebView() {
+  return [[CWVWebView alloc]
+      initWithFrame:CGRectMake(0, 0, 50, 50)
+      configuration:[CWVWebViewConfiguration defaultConfiguration]];
+}
+
+// Creates a new web view and restores its state from |source_web_view|.
+CWVWebView* CreateWebViewWithState(CWVWebView* source_web_view) {
+  NSMutableData* data = [[NSMutableData alloc] init];
+  NSKeyedArchiver* archiver =
+      [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
+  [source_web_view encodeRestorableStateWithCoder:archiver];
+  [archiver finishEncoding];
+  NSKeyedUnarchiver* unarchiver =
+      [[NSKeyedUnarchiver alloc] initForReadingWithData:data];
+  CWVWebView* result = CreateWebView();
+  [result decodeRestorableStateWithCoder:unarchiver];
+  return result;
+}
+
+}  // namespace
+
+namespace ios_web_view {
+
+// Tests encodeRestorableStateWithCoder: and decodeRestorableStateWithCoder:
+// methods.
+typedef ios_web_view::ChromeWebViewTest ChromeWebViewRestorableStateTest;
+TEST_F(ChromeWebViewRestorableStateTest, EncodeDecode) {
+  // Create web view that will be used as a source for state restoration.
+  CWVWebView* web_view = CreateWebView();
+
+  // Load 2 URLs to create non-default state.
+  ASSERT_FALSE(web_view.lastCommittedURL);
+  ASSERT_FALSE(web_view.visibleURL);
+  ASSERT_FALSE(web_view.canGoBack);
+  ASSERT_FALSE(web_view.canGoForward);
+  LoadUrl(web_view, [NSURL URLWithString:@"about:newtab"]);
+  ASSERT_NSEQ(@"about:newtab", web_view.lastCommittedURL.absoluteString);
+  ASSERT_NSEQ(@"about:newtab", web_view.visibleURL.absoluteString);
+  LoadUrl(web_view, [NSURL URLWithString:@"about:blank"]);
+  ASSERT_NSEQ(@"about:blank", web_view.lastCommittedURL.absoluteString);
+  ASSERT_NSEQ(@"about:blank", web_view.visibleURL.absoluteString);
+  ASSERT_TRUE(web_view.canGoBack);
+  ASSERT_FALSE(web_view.canGoForward);
+
+  // Create second web view and restore its state from the first web view.
+  CWVWebView* restored_web_view = CreateWebViewWithState(web_view);
+
+  // Verify that the state has been restored correctly.
+  EXPECT_NSEQ(@"about:blank",
+              restored_web_view.lastCommittedURL.absoluteString);
+  EXPECT_NSEQ(@"about:blank", restored_web_view.visibleURL.absoluteString);
+  EXPECT_TRUE(web_view.canGoBack);
+  EXPECT_FALSE(web_view.canGoForward);
+}
+
+}  // namespace ios_web_view