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:
GetStringWidth(const char * text)16 int GetStringWidth(const char *text) {
17 return Canvas::GetStringWidth(UTF8ToUTF16(text), font_);
18 }
19
SizeStringInt(const char * text,int width,int line_height)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
TEST_F(CanvasTest,StringWidth)33 TEST_F(CanvasTest, StringWidth) {
34 EXPECT_GT(GetStringWidth("Test"), 0);
35 }
36
TEST_F(CanvasTest,StringWidthEmptyString)37 TEST_F(CanvasTest, StringWidthEmptyString) {
38 EXPECT_EQ(0, GetStringWidth(""));
39 }
40
TEST_F(CanvasTest,StringSizeEmptyString)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
TEST_F(CanvasTest,MAYBE_StringSizeWithLineHeight)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