Adjusts content bubble animation with respect to icon size

chrome/browser/ui/views/location_bar/icon_label_bubble_view_unittest.cc

Index: chrome/browser/ui/views/location_bar/icon_label_bubble_view_unittest.cc
diff --git a/chrome/browser/ui/views/location_bar/icon_label_bubble_view_unittest.cc b/chrome/browser/ui/views/location_bar/icon_label_bubble_view_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..36e1a4ad4d2ce7ed81610c838519bcb560d8c57d
--- /dev/null
+++ b/chrome/browser/ui/views/location_bar/icon_label_bubble_view_unittest.cc
@@ -0,0 +1,217 @@
+// 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.
+
+#include "chrome/browser/ui/views/location_bar/icon_label_bubble_view.h"
+
+#include "base/strings/utf_string_conversions.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/views/controls/image_view.h"
+#include "ui/views/test/views_test_base.h"
+
+namespace {
+
+const int kStayOpenTimeMS = 100;
+const int kOpenTimeMS = 100;
+const int kAnimationDurationMS = (kOpenTimeMS * 2) + kStayOpenTimeMS;
+const int kImageSize = 15;
+const SkColor kTestColor = SkColorSetRGB(64, 64, 64);
+const int kNumberOfSteps = 300;
+
+class TestIconLabelBubbleView : public IconLabelBubbleView {
+ public:
+  enum State {
+    GROWING,
+    STEADY,
+    SHRINKING,
+  };
+
+  TestIconLabelBubbleView(const gfx::FontList& font_list, SkColor color)
+      : IconLabelBubbleView(0, font_list, color, false), value_(0) {
+    GetImageView()->SetImageSize(gfx::Size(kImageSize, kImageSize));
+    SetLabel(base::ASCIIToUTF16("Label"));
+  }
+
+  void SetCurrentAnimationValue(int value) {
+    value_ = value;
+    SizeToPreferredSize();
+  }
+
+  int width() { return bounds().width(); }
+  bool IsLabelVisible() const { return label()->visible(); }
+  void SetLabelVisible(bool visible) { label()->SetVisible(visible); }
+  const gfx::Rect& GetLabelBounds() const { return label()->bounds(); }
+
+  State state() const {
+    const double kOpenFraction =
+        static_cast<double>(kOpenTimeMS) / kAnimationDurationMS;
+    double state = value_ / (double)kNumberOfSteps;
+    if (state < kOpenFraction)
+      return GROWING;
+    if (state > (1.0 - kOpenFraction))
+      return SHRINKING;
+    return STEADY;
+  }
+
+ protected:
+  // IconLabelBubbleView:
+  SkColor GetTextColor() const override { return kTestColor; }
+  SkColor GetBorderColor() const override { return kTestColor; }
+
+  bool ShouldShowBackground() const override {
+    return !IsShrinking() || label()->width() > 0;
+  }
+
+  double WidthMultiplier() const override {
+    const double kOpenFraction =
+        static_cast<double>(kOpenTimeMS) / kAnimationDurationMS;
+    double fraction = value_ / (double)kNumberOfSteps;
+    switch (state()) {
+      case GROWING:
+        return fraction / kOpenFraction;
+      case STEADY:
+        return 1.0;
+      case SHRINKING:
+        return (1.0 - fraction) / kOpenFraction;
+    }
+    NOTREACHED();
+    return 1.0;
+  }
+
+  bool IsShrinking() const override { return state() == SHRINKING; }
+
+ private:
+  int value_;
+  DISALLOW_COPY_AND_ASSIGN(TestIconLabelBubbleView);
+};
+
+}  // namespace
+
+class IconLabelBubbleViewTest : public views::ViewsTestBase {
+ public:
+  IconLabelBubbleViewTest()
+      : views::ViewsTestBase(),
+        steady_reached_(false),
+        shrinking_reached_(false),
+        minimum_size_reached_(false),
+        previous_width_(0),
+        initial_image_x_(0) {}
+  ~IconLabelBubbleViewTest() override {}
+
+ protected:
+  // views::ViewsTestBase:
+  void SetUp() override {
+    views::ViewsTestBase::SetUp();
+    gfx::FontList font_list;
+    view_.reset(new TestIconLabelBubbleView(font_list, kTestColor));
+  }
+
+  void VerifyWithAnimationStep(int step) {
+    Reset();
+    for (int value = 0; value < kNumberOfSteps; value += step) {
+      SetValue(value);
+      VerifyAnimationStep();
+    }
+    view_->SetLabelVisible(false);
+  }
+
+ private:
+  void Reset() {
+    view_->SetLabelVisible(true);
+    SetValue(0);
+    steady_reached_ = false;
+    shrinking_reached_ = false;
+    minimum_size_reached_ = false;
+    previous_width_ = 0;
+    initial_image_x_ = GetImageBounds().x();
+    EXPECT_NE(0, initial_image_x_);
+  }
+
+  void VerifyAnimationStep() {
+    switch (state()) {
+      case TestIconLabelBubbleView::State::GROWING: {
+        EXPECT_GE(width(), previous_width_);
+        EXPECT_EQ(initial_image_x_, GetImageBounds().x());
+        EXPECT_GE(GetImageBounds().x(), 0);
+        if (GetImageBounds().width() > 0)
+          EXPECT_LE(GetImageBounds().right(), width());
+        EXPECT_TRUE(IsLabelVisible());
+        if (GetLabelBounds().width() > 0) {
+          EXPECT_GT(GetLabelBounds().x(), GetImageBounds().right());
+          EXPECT_LT(GetLabelBounds().right(), width());
+        }
+        break;
+      }
+      case TestIconLabelBubbleView::State::STEADY: {
+        if (steady_reached_)
+          EXPECT_EQ(previous_width_, width());
+        EXPECT_EQ(initial_image_x_, GetImageBounds().x());
+        EXPECT_GT(GetImageBounds().x(), 0);
+        EXPECT_LT(GetImageBounds().right(), width());
+        EXPECT_TRUE(IsLabelVisible());
+        EXPECT_GT(GetLabelBounds().x(), GetImageBounds().right());
+        EXPECT_LT(GetLabelBounds().right(), width());
+        steady_reached_ = true;
+        break;
+      }
+      case TestIconLabelBubbleView::State::SHRINKING: {
+        if (shrinking_reached_)
+          EXPECT_LE(width(), previous_width_);
+        if (minimum_size_reached_)
+          EXPECT_EQ(previous_width_, width());
+
+        EXPECT_GE(GetImageBounds().x(), 0);
+        if (width() <= initial_image_x_ + kImageSize) {
+          EXPECT_EQ(width(), GetImageBounds().right());
+          EXPECT_EQ(0, GetLabelBounds().width());
+        } else {
+          EXPECT_EQ(initial_image_x_, GetImageBounds().x());
+          EXPECT_LE(GetImageBounds().right(), width());
+        }
+        if (GetLabelBounds().width() > 0) {
+          EXPECT_GT(GetLabelBounds().x(), GetImageBounds().right());
+          EXPECT_LT(GetLabelBounds().right(), width());
+        }
+        shrinking_reached_ = true;
+        if (width() == kImageSize)
+          minimum_size_reached_ = true;
+        break;
+      }
+    }
+    previous_width_ = width();
+  }
+
+  void SetValue(int value) { view_->SetCurrentAnimationValue(value); }
+
+  TestIconLabelBubbleView::State state() const { return view_->state(); }
+
+  int width() { return view_->width(); }
+
+  bool IsLabelVisible() { return view_->IsLabelVisible(); }
+
+  const gfx::Rect& GetLabelBounds() const { return view_->GetLabelBounds(); }
+
+  const gfx::Rect& GetImageBounds() const {
+    return view_->GetImageView()->bounds();
+  }
+
+  scoped_ptr<TestIconLabelBubbleView> view_;
+
+  bool steady_reached_;
+  bool shrinking_reached_;
+  bool minimum_size_reached_;
+  int previous_width_;
+  int initial_image_x_;
+};
+
+// Tests layout rules for IconLabelBubbleView while simulating animation.
+// The animation is first growing the bubble from zero, then keeping its size
+// constant and finally shrinking it down to its minimum size which is the image
+// size.
+// Various step sizes during animation simulate different possible timing.
+TEST_F(IconLabelBubbleViewTest, AnimateLayout) {
+  VerifyWithAnimationStep(1);
+  VerifyWithAnimationStep(5);
+  VerifyWithAnimationStep(10);
+  VerifyWithAnimationStep(25);
+}