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