Add new views::LabelButton and LabelButtonBorder.

ui/views/controls/button/label_button_unittest.cc

+// Copyright (c) 2012 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 "base/utf_string_conversions.h"
+#include "ui/gfx/canvas.h"
+#include "ui/views/controls/button/label_button.h"
+#include "ui/views/test/views_test_base.h"
+
+namespace {
+
+gfx::ImageSkia CreateTestImage(int width, int height) {
+  SkBitmap bitmap;
+  bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
+  bitmap.allocPixels();
+  return gfx::ImageSkia(bitmap);
+}
+
+}  // namespace
+
+namespace views {
+
+typedef ViewsTestBase LabelButtonTest;
+
+TEST_F(LabelButtonTest, Init) {
+  string16 text = ASCIIToUTF16("abc");
+  LabelButton button(NULL, text);
+
+  EXPECT_TRUE(button.GetImage(CustomButton::BS_NORMAL).isNull());
+  EXPECT_TRUE(button.GetImage(CustomButton::BS_HOT).isNull());
+  EXPECT_TRUE(button.GetImage(CustomButton::BS_PUSHED).isNull());
+  EXPECT_TRUE(button.GetImage(CustomButton::BS_DISABLED).isNull());
+
+  EXPECT_EQ(text, button.GetLabel()->text());
+  EXPECT_EQ(Label::ALIGN_LEFT, button.GetHorizontalAlignment());
+  EXPECT_FALSE(button.default_button());
+  EXPECT_FALSE(button.native_theme());
+  EXPECT_EQ(CustomButton::BS_NORMAL, button.state());
+
+  // The button should only have a Label child view to start.
+  EXPECT_EQ(1, button.child_count());
+  EXPECT_EQ(button.child_at(0), button.GetLabel());
+
+  // Setting an image should re-run layout and place it before the Label.
+  button.SetImage(CustomButton::BS_NORMAL, CreateTestImage(1, 1));
+  EXPECT_EQ(2, button.child_count());
+  EXPECT_EQ(button.child_at(1), button.GetLabel());
+
+  // Changing to ALIGN_RIGHT should flip the label and image order.
+  button.SetHorizontalAlignment(Label::ALIGN_RIGHT);
+  EXPECT_EQ(2, button.child_count());
+  EXPECT_EQ(button.child_at(0), button.GetLabel());
+}
+
+TEST_F(LabelButtonTest, Label) {
+  LabelButton button(NULL, string16());
+
+  gfx::Font font;
+  string16 short_text = ASCIIToUTF16("abcdefghijklm");
+  string16 long_text = ASCIIToUTF16("abcdefghijklmnopqrstuvwxyz");
+  const int short_text_width = gfx::Canvas::GetStringWidth(short_text, font);
+  const int long_text_width = gfx::Canvas::GetStringWidth(long_text, font);
+  EXPECT_GT(button.GetPreferredSize().height(), font.GetHeight());
+
+  // The width increases monotonically with string size (it does not shrink).
+  EXPECT_LT(button.GetPreferredSize().width(), short_text_width);
+  button.SetText(short_text);
+  EXPECT_GT(button.GetPreferredSize().width(), short_text_width);
+  EXPECT_LT(button.GetPreferredSize().width(), long_text_width);
+  button.SetText(long_text);
+  EXPECT_GT(button.GetPreferredSize().width(), long_text_width);
+  button.SetText(short_text);
+  EXPECT_GT(button.GetPreferredSize().width(), long_text_width);
+
+  // Clamp the size to a maximum value.
+  button.set_max_size(gfx::Size(long_text_width, 1));
+  EXPECT_EQ(button.GetPreferredSize(), gfx::Size(long_text_width, 1));
+
+  // Clear the monotonically increasing minimum size.
+  button.set_min_size(gfx::Size());
+  EXPECT_GT(button.GetPreferredSize().width(), short_text_width);
+  EXPECT_LT(button.GetPreferredSize().width(), long_text_width);
+}
+
+TEST_F(LabelButtonTest, Image) {
+  LabelButton button(NULL, string16());
+
+  const int small_size = 50, large_size = 100;
+  gfx::ImageSkia small_image = CreateTestImage(small_size, small_size);
+  gfx::ImageSkia large_image = CreateTestImage(large_size, large_size);
+
+  // The width increases monotonically with image size (it does not shrink).
+  EXPECT_LT(button.GetPreferredSize().width(), small_size);
+  EXPECT_LT(button.GetPreferredSize().height(), small_size);
+  button.SetImage(CustomButton::BS_NORMAL, small_image);
+  EXPECT_GT(button.GetPreferredSize().width(), small_size);
+  EXPECT_GT(button.GetPreferredSize().height(), small_size);
+  EXPECT_LT(button.GetPreferredSize().width(), large_size);
+  EXPECT_LT(button.GetPreferredSize().height(), large_size);
+  button.SetImage(CustomButton::BS_NORMAL, large_image);
+  EXPECT_GT(button.GetPreferredSize().width(), large_size);
+  EXPECT_GT(button.GetPreferredSize().height(), large_size);
+  button.SetImage(CustomButton::BS_NORMAL, small_image);
+  EXPECT_GT(button.GetPreferredSize().width(), large_size);
+  EXPECT_GT(button.GetPreferredSize().height(), large_size);
+
+  // Clamp the size to a maximum value.
+  button.set_max_size(gfx::Size(large_size, 1));
+  EXPECT_EQ(button.GetPreferredSize(), gfx::Size(large_size, 1));
+
+  // Clear the monotonically increasing minimum size.
+  button.set_min_size(gfx::Size());
+  EXPECT_GT(button.GetPreferredSize().width(), small_size);
+  EXPECT_LT(button.GetPreferredSize().width(), large_size);
+}
+
+}  // namespace views