1// Copyright (c) 2012 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 "ui/gfx/canvas.h" 6 7#include <limits> 8 9#include "base/strings/utf_string_conversions.h" 10#include "testing/gtest/include/gtest/gtest.h" 11#include "ui/gfx/font_list.h" 12 13namespace gfx { 14 15class CanvasTest : public testing::Test { 16 protected: 17 int GetStringWidth(const char *text) { 18 return Canvas::GetStringWidth(base::UTF8ToUTF16(text), font_list_); 19 } 20 21 gfx::Size SizeStringInt(const char *text, int width, int line_height) { 22 base::string16 text16 = base::UTF8ToUTF16(text); 23 int height = 0; 24 int flags = 25 (text16.find('\n') != base::string16::npos) ? Canvas::MULTI_LINE : 0; 26 Canvas::SizeStringInt(text16, font_list_, &width, &height, line_height, 27 flags); 28 return gfx::Size(width, height); 29 } 30 31 private: 32 FontList font_list_; 33}; 34 35TEST_F(CanvasTest, StringWidth) { 36 EXPECT_GT(GetStringWidth("Test"), 0); 37} 38 39TEST_F(CanvasTest, StringWidthEmptyString) { 40 EXPECT_EQ(0, GetStringWidth("")); 41} 42 43TEST_F(CanvasTest, StringSizeEmptyString) { 44 gfx::Size size = SizeStringInt("", 0, 0); 45 EXPECT_EQ(0, size.width()); 46 EXPECT_GT(size.height(), 0); 47} 48 49// Line height is only supported on Skia. 50#if defined(OS_MACOSX) || defined(OS_ANDROID) 51#define MAYBE_StringSizeWithLineHeight DISABLED_StringSizeWithLineHeight 52#else 53#define MAYBE_StringSizeWithLineHeight StringSizeWithLineHeight 54#endif 55 56TEST_F(CanvasTest, MAYBE_StringSizeWithLineHeight) { 57 gfx::Size one_line_size = SizeStringInt("Q", 0, 0); 58 gfx::Size four_line_size = SizeStringInt("Q\nQ\nQ\nQ", 1000000, 1000); 59 EXPECT_EQ(one_line_size.width(), four_line_size.width()); 60 EXPECT_EQ(3 * 1000 + one_line_size.height(), four_line_size.height()); 61} 62 63} // namespace gfx 64