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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "gfx/font.h"
#include "base/utf_string_conversions.h"
#if defined(OS_WIN)
#include "gfx/platform_font_win.h"
#endif // defined(OS_WIN)
#include "testing/gtest/include/gtest/gtest.h"
namespace {
using gfx::Font;
class FontTest : public testing::Test {
};
#if defined(OS_WIN)
class ScopedMinimumFontSizeCallback {
public:
explicit ScopedMinimumFontSizeCallback(int minimum_size) {
minimum_size_ = minimum_size;
old_callback_ = gfx::PlatformFontWin::get_minimum_font_size_callback;
gfx::PlatformFontWin::get_minimum_font_size_callback = &GetMinimumFontSize;
}
~ScopedMinimumFontSizeCallback() {
gfx::PlatformFontWin::get_minimum_font_size_callback = old_callback_;
}
private:
static int GetMinimumFontSize() {
return minimum_size_;
}
gfx::PlatformFontWin::GetMinimumFontSizeCallback old_callback_;
static int minimum_size_;
DISALLOW_COPY_AND_ASSIGN(ScopedMinimumFontSizeCallback);
};
int ScopedMinimumFontSizeCallback::minimum_size_ = 0;
#endif // defined(OS_WIN)
TEST_F(FontTest, LoadArial) {
Font cf(ASCIIToUTF16("Arial"), 16);
ASSERT_TRUE(cf.GetNativeFont());
ASSERT_EQ(cf.GetStyle(), Font::NORMAL);
ASSERT_EQ(cf.GetFontSize(), 16);
ASSERT_EQ(cf.GetFontName(), ASCIIToUTF16("Arial"));
}
TEST_F(FontTest, LoadArialBold) {
Font cf(ASCIIToUTF16("Arial"), 16);
Font bold(cf.DeriveFont(0, Font::BOLD));
ASSERT_TRUE(bold.GetNativeFont());
ASSERT_EQ(bold.GetStyle(), Font::BOLD);
}
TEST_F(FontTest, Ascent) {
Font cf(ASCIIToUTF16("Arial"), 16);
ASSERT_GT(cf.GetBaseline(), 2);
ASSERT_LE(cf.GetBaseline(), 22);
}
TEST_F(FontTest, Height) {
Font cf(ASCIIToUTF16("Arial"), 16);
ASSERT_GE(cf.GetHeight(), 16);
// TODO(akalin): Figure out why height is so large on Linux.
ASSERT_LE(cf.GetHeight(), 26);
}
TEST_F(FontTest, AvgWidths) {
Font cf(ASCIIToUTF16("Arial"), 16);
ASSERT_EQ(cf.GetExpectedTextWidth(0), 0);
ASSERT_GT(cf.GetExpectedTextWidth(1), cf.GetExpectedTextWidth(0));
ASSERT_GT(cf.GetExpectedTextWidth(2), cf.GetExpectedTextWidth(1));
ASSERT_GT(cf.GetExpectedTextWidth(3), cf.GetExpectedTextWidth(2));
}
TEST_F(FontTest, Widths) {
Font cf(ASCIIToUTF16("Arial"), 16);
ASSERT_EQ(cf.GetStringWidth(ASCIIToUTF16("")), 0);
ASSERT_GT(cf.GetStringWidth(ASCIIToUTF16("a")),
cf.GetStringWidth(ASCIIToUTF16("")));
ASSERT_GT(cf.GetStringWidth(ASCIIToUTF16("ab")),
cf.GetStringWidth(ASCIIToUTF16("a")));
ASSERT_GT(cf.GetStringWidth(ASCIIToUTF16("abc")),
cf.GetStringWidth(ASCIIToUTF16("ab")));
}
#if defined(OS_WIN)
TEST_F(FontTest, DeriveFontResizesIfSizeTooSmall) {
// This creates font of height -8.
Font cf(L"Arial", 6);
// The minimum font size is set to 5 in browser_main.cc.
ScopedMinimumFontSizeCallback minimum_size(5);
Font derived_font = cf.DeriveFont(-4);
LOGFONT font_info;
GetObject(derived_font.GetNativeFont(), sizeof(LOGFONT), &font_info);
EXPECT_EQ(-5, font_info.lfHeight);
}
TEST_F(FontTest, DeriveFontKeepsOriginalSizeIfHeightOk) {
// This creates font of height -8.
Font cf(L"Arial", 6);
// The minimum font size is set to 5 in browser_main.cc.
ScopedMinimumFontSizeCallback minimum_size(5);
Font derived_font = cf.DeriveFont(-2);
LOGFONT font_info;
GetObject(derived_font.GetNativeFont(), sizeof(LOGFONT), &font_info);
EXPECT_EQ(-6, font_info.lfHeight);
}
#endif
} // namespace
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