components/view_manager/focus_controller_unittest.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/view_manager/focus_controller.h"
   6
   7 #include "components/view_manager/focus_controller_delegate.h"
   8 #include "components/view_manager/server_view.h"
   9 #include "components/view_manager/test_server_view_delegate.h"
  10 #include "testing/gtest/include/gtest/gtest.h"
  11
  12 namespace view_manager {
  13 namespace {
  14
  15 class TestFocusControllerDelegate : public FocusControllerDelegate {
  16  public:
  17   TestFocusControllerDelegate()
  18       : change_count_(0u),
  19         old_focused_view_(nullptr),
  20         new_focused_view_(nullptr) {}
  21
  22   void ClearAll() {
  23     change_count_ = 0u;
  24     old_focused_view_ = nullptr;
  25     new_focused_view_ = nullptr;
  26   }
  27   size_t change_count() const { return change_count_; }
  28   ServerView* old_focused_view() { return old_focused_view_; }
  29   ServerView* new_focused_view() { return new_focused_view_; }
  30
  31  private:
  32   // FocusControllerDelegate:
  33   void OnFocusChanged(ServerView* old_focused_view,
  34                       ServerView* new_focused_view) override {
  35     change_count_++;
  36     old_focused_view_ = old_focused_view;
  37     new_focused_view_ = new_focused_view;
  38   }
  39
  40   size_t change_count_;
  41   ServerView* old_focused_view_;
  42   ServerView* new_focused_view_;
  43
  44   DISALLOW_COPY_AND_ASSIGN(TestFocusControllerDelegate);
  45 };
  46
  47 }  // namespace
  48
  49 TEST(FocusControllerTest, Basic) {
  50   TestServerViewDelegate server_view_delegate;
  51   ServerView root(&server_view_delegate, ViewId());
  52   root.SetVisible(true);
  53   ServerView child(&server_view_delegate, ViewId());
  54   child.SetVisible(true);
  55   root.Add(&child);
  56   ServerView child_child(&server_view_delegate, ViewId());
  57   child_child.SetVisible(true);
  58   child.Add(&child_child);
  59
  60   TestFocusControllerDelegate focus_delegate;
  61   FocusController focus_controller(&focus_delegate, &root);
  62
  63   focus_controller.SetFocusedView(&child_child);
  64   EXPECT_EQ(0u, focus_delegate.change_count());
  65
  66   // Remove the ancestor of the focused view, focus should go to the |root|.
  67   root.Remove(&child);
  68   EXPECT_EQ(1u, focus_delegate.change_count());
  69   EXPECT_EQ(&root, focus_delegate.new_focused_view());
  70   EXPECT_EQ(&child_child, focus_delegate.old_focused_view());
  71   focus_delegate.ClearAll();
  72
  73   // Make the focused view invisible. Focus is lost in this case (as no one
  74   // to give focus to).
  75   root.SetVisible(false);
  76   EXPECT_EQ(1u, focus_delegate.change_count());
  77   EXPECT_EQ(nullptr, focus_delegate.new_focused_view());
  78   EXPECT_EQ(&root, focus_delegate.old_focused_view());
  79   focus_delegate.ClearAll();
  80
  81   // Go back to initial state and focus |child_child|.
  82   root.SetVisible(true);
  83   root.Add(&child);
  84   focus_controller.SetFocusedView(&child_child);
  85   EXPECT_EQ(0u, focus_delegate.change_count());
  86
  87   // Hide the focused view, focus should go to parent.
  88   child_child.SetVisible(false);
  89   EXPECT_EQ(1u, focus_delegate.change_count());
  90   EXPECT_EQ(&child, focus_delegate.new_focused_view());
  91   EXPECT_EQ(&child_child, focus_delegate.old_focused_view());
  92   focus_delegate.ClearAll();
  93
  94   child_child.SetVisible(true);
  95   focus_controller.SetFocusedView(&child_child);
  96   EXPECT_EQ(0u, focus_delegate.change_count());
  97
  98   // Hide the parent of the focused view.
  99   child.SetVisible(false);
 100   EXPECT_EQ(1u, focus_delegate.change_count());
 101   EXPECT_EQ(&root, focus_delegate.new_focused_view());
 102   EXPECT_EQ(&child_child, focus_delegate.old_focused_view());
 103   focus_delegate.ClearAll();
 104 }
 105
 106 }  // namespace view_manager