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
13 namespace gfx {
14
15 class CanvasTest : public testing::Test {
16 protected:
GetStringWidth(const char * text)17 int GetStringWidth(const char *text) {
18 return Canvas::GetStringWidth(base::UTF8ToUTF16(text), font_list_);
19 }
20
SizeStringInt(const char * text,int width,int line_height)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
TEST_F(CanvasTest,StringWidth)35 TEST_F(CanvasTest, StringWidth) {
36 EXPECT_GT(GetStringWidth("Test"), 0);
37 }
38
TEST_F(CanvasTest,StringWidthEmptyString)39 TEST_F(CanvasTest, StringWidthEmptyString) {
40 EXPECT_EQ(0, GetStringWidth(""));
41 }
42
TEST_F(CanvasTest,StringSizeEmptyString)43 TEST_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
TEST_F(CanvasTest,MAYBE_StringSizeWithLineHeight)56 TEST_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