Fixes ungraceful handling of destroyed GlobalError GlobalErrorBubbleView.

chrome/browser/ui/views/global_error_bubble_view_unittest.cc

+// Copyright (c) 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.
+
+#include "chrome/browser/ui/views/global_error_bubble_view.h"
+
+#include <memory>
+#include <vector>
+
+#include "chrome/browser/ui/global_error/global_error.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/codec/png_codec.h"
+#include "ui/gfx/image/image.h"
+#include "ui/gfx/image/image_png_rep.h"
+#include "ui/views/controls/button/button.h"
+#include "ui/views/controls/button/label_button.h"
+
+using ::testing::_;
+using ::testing::Return;
+using ::testing::StrictMock;
+
+namespace views {
+class MockButtonListener : public views::ButtonListener {
+ public:
+  MockButtonListener() {}
+  ~MockButtonListener() override;
+  MOCK_METHOD2(ButtonPressed, void(Button* sender, const ui::Event& event));
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MockButtonListener);
+};
+
+MockButtonListener::~MockButtonListener() {}
+
+namespace {
+
+class MockGlobalErrorWithStandardBubble : public GlobalErrorWithStandardBubble {
+ public:
+  MockGlobalErrorWithStandardBubble() {}
+  ~MockGlobalErrorWithStandardBubble() override;
+
+  MOCK_METHOD0(GetBubbleViewIcon, gfx::Image());
+  MOCK_METHOD0(GetBubbleViewTitle, base::string16());
+  MOCK_METHOD0(GetBubbleViewMessage, std::vector<base::string16>());
+  MOCK_METHOD0(GetBubbleViewAcceptButtonLabel, base::string16());
+  MOCK_CONST_METHOD0(ShouldShowCloseButton, bool());
+  MOCK_METHOD0(ShouldAddElevationIconToAcceptButton, bool());
+  MOCK_METHOD0(GetBubbleViewCancelButtonLabel, base::string16());
+  MOCK_METHOD1(BubbleViewDidClose, void(Browser* browser));
+  MOCK_METHOD1(OnBubbleViewDidClose, void(Browser* browser));
+  MOCK_METHOD1(BubbleViewAcceptButtonPressed, void(Browser* browser));
+  MOCK_METHOD1(BubbleViewCancelButtonPressed, void(Browser* browser));
+  MOCK_CONST_METHOD0(ShouldCloseOnDeactivate, bool());
+  MOCK_METHOD0(HasBubbleView, bool());
+  MOCK_METHOD0(HasShownBubbleView, bool());
+  MOCK_METHOD1(ShowBubbleView, void(Browser* browser));
+  MOCK_METHOD0(GetBubbleView, GlobalErrorBubbleViewBase*());
+  MOCK_METHOD0(HasMenuItem, bool());
+  MOCK_METHOD0(MenuItemCommandID, int());
+  MOCK_METHOD0(MenuItemLabel, base::string16());
+  MOCK_METHOD1(ExecuteMenuItem, void(Browser* browser));
+  MOCK_METHOD0(GetBubbleViewMessages, std::vector<base::string16>());
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MockGlobalErrorWithStandardBubble);
+};
+
+MockGlobalErrorWithStandardBubble::~MockGlobalErrorWithStandardBubble() {}
+
+const SkBitmap CreateBitmap(int width, int height) {
+  SkBitmap bitmap;
+  bitmap.allocN32Pixels(width, height);
+  bitmap.eraseARGB(255, 0, 255, 0);
+  return bitmap;
+}
+
+scoped_refptr<base::RefCountedMemory> CreatePNGBytes(int edge_size) {
+  SkBitmap bitmap = CreateBitmap(edge_size, edge_size);
+  scoped_refptr<base::RefCountedBytes> bytes(new base::RefCountedBytes());
+  gfx::PNGCodec::EncodeBGRASkBitmap(bitmap, false, &bytes->data());
+  return bytes;
+}
+
+}  // namespace
+
+class GlobalErrorBubbleViewTest : public testing::Test {
+ public:
+  GlobalErrorBubbleViewTest()
+      : mock_global_error_with_standard_bubble_(
+            base::MakeUnique<StrictMock<MockGlobalErrorWithStandardBubble>>()),
+        view_(base::MakeUnique<GlobalErrorBubbleView>(
+            new views::View(),
+            anchor_point_,
+            arrow_,
+            nullptr,
+            mock_global_error_with_standard_bubble_->AsWeakPtr())) {}
+
+ protected:
+  std::unique_ptr<StrictMock<MockGlobalErrorWithStandardBubble>>
+      mock_global_error_with_standard_bubble_;
+  const gfx::Point anchor_point_;
+  views::BubbleBorder::Arrow arrow_;
+  std::unique_ptr<GlobalErrorBubbleView> view_;
+};
+
+TEST_F(GlobalErrorBubbleViewTest, GetWindowTitleCallsToError) {
+  EXPECT_CALL(*mock_global_error_with_standard_bubble_, GetBubbleViewTitle());

[Wez, 2017/01/24 01:45:55]

For calls that are basically just pass-through, I'd suggest just omitting them
from the test, OR doing a single test, e.g. named Basic, which has one
expectation for each call.

Then for the Error-is-null case, I'd again have a single test e.g.
CopesWithNullError and do the set of null-friendly calls there.

In general a test-case should test some specific situation, rather then having
one per API.  e.g. a single API may even have several test cases associated with
it, if it has particularly complicated semantics, each testing different
aspects. But then a single test case may also cover multiple APIs, if that makes
sense as a single test-case.

[CJ, 2017/01/25 01:12:14]

Done.

+  view_->GetWindowTitle();
+}
+
+TEST_F(GlobalErrorBubbleViewTest, GetWindowTitleHandlesNullError) {
+  mock_global_error_with_standard_bubble_.reset();
+  view_->GetWindowTitle();
+}
+
+TEST_F(GlobalErrorBubbleViewTest, GetWindowIconCallsToError) {
+  std::vector<gfx::ImagePNGRep> image_png_reps;
+  image_png_reps.push_back(gfx::ImagePNGRep(CreatePNGBytes(25), 1.0f));
+  gfx::Image image = gfx::Image(image_png_reps);
+  EXPECT_CALL(*mock_global_error_with_standard_bubble_, GetBubbleViewIcon())
+      .WillOnce(Return(image));
+  view_->GetWindowIcon();
+}
+
+TEST_F(GlobalErrorBubbleViewTest, ShouldShowWindowIconIsTrue) {
+  EXPECT_TRUE(view_->ShouldShowWindowIcon());
+}
+
+TEST_F(GlobalErrorBubbleViewTest, WindowClosingCallsToError) {
+  EXPECT_CALL(*mock_global_error_with_standard_bubble_,
+              BubbleViewDidClose(nullptr));
+  view_->WindowClosing();
+}
+
+TEST_F(GlobalErrorBubbleViewTest, WindowClosingHandlesNullError) {
+  mock_global_error_with_standard_bubble_.reset();
+  view_->WindowClosing();
+}
+
+TEST_F(GlobalErrorBubbleViewTest, UpdateButtonCallsToError) {
+  views::LabelButton* button =
+      new views::LabelButton(new MockButtonListener(), base::string16());
+  EXPECT_CALL(*mock_global_error_with_standard_bubble_,
+              GetBubbleViewAcceptButtonLabel());
+  EXPECT_CALL(*mock_global_error_with_standard_bubble_,
+              GetBubbleViewCancelButtonLabel());
+  EXPECT_CALL(*mock_global_error_with_standard_bubble_,
+              ShouldAddElevationIconToAcceptButton())
+      .WillOnce(Return(false));
+  view_->UpdateButton(button, ui::DIALOG_BUTTON_OK);
+}
+
+TEST_F(GlobalErrorBubbleViewTest, UpdateButtonHandlesNullError) {
+  views::LabelButton* button =
+      new views::LabelButton(new MockButtonListener(), base::string16());
+  mock_global_error_with_standard_bubble_.reset();
+  view_->UpdateButton(button, ui::DIALOG_BUTTON_OK);
+}
+
+TEST_F(GlobalErrorBubbleViewTest, ShouldShowCloseButtonCallsToError) {
+  EXPECT_CALL(*mock_global_error_with_standard_bubble_,
+              ShouldShowCloseButton());
+  view_->ShouldShowCloseButton();
+}
+
+TEST_F(GlobalErrorBubbleViewTest, ShouldShowCloseButtonHandlesNullError) {
+  mock_global_error_with_standard_bubble_.reset();
+  view_->ShouldShowCloseButton();
+}
+
+TEST_F(GlobalErrorBubbleViewTest, GetDialogButtonLabelCallsToError) {
+  EXPECT_CALL(*mock_global_error_with_standard_bubble_,
+              GetBubbleViewAcceptButtonLabel());
+  EXPECT_CALL(*mock_global_error_with_standard_bubble_,
+              GetBubbleViewCancelButtonLabel());
+  view_->GetDialogButtonLabel(ui::DIALOG_BUTTON_OK);
+  view_->GetDialogButtonLabel(ui::DIALOG_BUTTON_CANCEL);
+}
+
+TEST_F(GlobalErrorBubbleViewTest, GetDialogButtonButtonsCallsToError) {
+  EXPECT_CALL(*mock_global_error_with_standard_bubble_,
+              GetBubbleViewCancelButtonLabel());
+  view_->GetDialogButtons();
+}
+
+TEST_F(GlobalErrorBubbleViewTest, CancelCallsToError) {
+  EXPECT_CALL(*mock_global_error_with_standard_bubble_,
+              BubbleViewCancelButtonPressed(nullptr));
+  view_->Cancel();
+}
+
+TEST_F(GlobalErrorBubbleViewTest, CancelHandlesNullError) {
+  mock_global_error_with_standard_bubble_.reset();
+  view_->Cancel();
+}
+
+TEST_F(GlobalErrorBubbleViewTest, AcceptCallsToError) {
+  EXPECT_CALL(*mock_global_error_with_standard_bubble_,
+              BubbleViewAcceptButtonPressed(nullptr));
+  view_->Accept();
+}
+
+TEST_F(GlobalErrorBubbleViewTest, AcceptHandlesNullError) {
+  mock_global_error_with_standard_bubble_.reset();
+  view_->Accept();
+}
+
+}  // namespace views