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