Implemented FormResubmissionTabHelper.

ios/chrome/browser/web/form_resubmission_tab_helper_unittest.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 "ios/chrome/browser/web/form_resubmission_tab_helper.h"
+
+#import <UIKit/UIKit.h>
+
+#include "base/bind.h"
+#include "base/mac/foundation_util.h"
+#include "base/test/ios/wait_util.h"
+#include "components/strings/grit/components_strings.h"
+#include "ios/chrome/browser/ui/ui_util.h"
+#import "ios/chrome/test/scoped_key_window.h"
+#import "ios/web/public/test/fakes/test_web_state.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/platform_test.h"
+#include "ui/base/l10n/l10n_util.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+namespace {
+// Test location passed to PresentFormResubmissionDialog.
+const CGFloat kDialogHLocation = 10;
+const CGFloat kDialogVLocation = 20;
+
+// No-op callback for PresentFormResubmissionDialog.
+void IgnoreBool(bool) {}
+}  // namespace
+
+// Test fixture for FormResubmissionTabHelper class.
+class FormResubmissionTabHelperTest : public PlatformTest {
+ protected:
+  FormResubmissionTabHelperTest()
+      : web_state_(new web::TestWebState()),
+        location_(CGPointMake(kDialogHLocation, kDialogVLocation)),
+        view_controller_([[UIViewController alloc] init]) {
+    UIView* view = [[UIView alloc] initWithFrame:view_controller_.view.bounds];
+    [view_controller_.view addSubview:view];
+    [scoped_key_window_.Get() setRootViewController:view_controller_];
+
+    web_state_->SetView(view);
+    web_state_->SetWebUsageEnabled(true);
+
+    FormResubmissionTabHelper::CreateForWebState(web_state_.get());
+  }
+
+  // Presents form resubmission dialog using FormResubmissionTabHelperTest.
+  void PresentDialog() {
+    ASSERT_FALSE(GetAlertController());
+    auto helper = FormResubmissionTabHelper::FromWebState(web_state_.get());
+    helper->PresentFormResubmissionDialog(location_, base::Bind(&IgnoreBool));
+    ASSERT_TRUE(GetAlertController());
+  }
+
+  // Return presented view controller as UIAlertController.
+  UIAlertController* GetAlertController() const {
+    return base::mac::ObjCCastStrict<UIAlertController>(
+        view_controller_.presentedViewController);
+  }
+
+ protected:
+  std::unique_ptr<web::TestWebState> web_state_;
+
+ private:
+  CGPoint location_;
+  ScopedKeyWindow scoped_key_window_;
+  UIViewController* view_controller_;
+};
+
+// Tests presented Form Resubmission dialog.
+TEST_F(FormResubmissionTabHelperTest, Preseting) {
+  PresentDialog();
+  EXPECT_FALSE(GetAlertController().title);
+  EXPECT_TRUE([GetAlertController().message
+      containsString:l10n_util::GetNSString(IDS_HTTP_POST_WARNING_TITLE)]);
+  EXPECT_TRUE([GetAlertController().message
+      containsString:l10n_util::GetNSString(IDS_HTTP_POST_WARNING)]);
+  if (IsIPadIdiom()) {
+    UIPopoverPresentationController* popover_presentation_controller =
+        GetAlertController().popoverPresentationController;
+    CGRect source_rect = popover_presentation_controller.sourceRect;
+    EXPECT_EQ(kDialogHLocation, CGRectGetMinX(source_rect));
+    EXPECT_EQ(kDialogVLocation, CGRectGetMinY(source_rect));
+  }
+}
+
+// Tests that dialog is dismissed when WebState is destroyed.
+TEST_F(FormResubmissionTabHelperTest, DismissingOnWebViewDestruction) {
+  PresentDialog();
+  web_state_.reset();
+  base::test::ios::WaitUntilCondition(^{
+    return GetAlertController() != nil;
+  });
+}
+
+// Tests that dialog is dismissed after provisional navigation has started.
+TEST_F(FormResubmissionTabHelperTest, DismissingOnNavigationStart) {
+  PresentDialog();
+  web_state_->OnProvisionalNavigationStarted(GURL());
+  base::test::ios::WaitUntilCondition(^{
+    return GetAlertController() != nil;
+  });
+}