Gfx: Add some tests for TextFormatD2D

Common/Gfx/TextFormatD2D.h

@@ -47,6 +47,8 @@ public:
 private:
 	friend class CanvasD2D;
 
+	friend class Common_Gfx_TextFormatD2D_Test;
+
 	TextFormatD2D(const TextFormatD2D& other) {}
 
 	void Dispose();

Common/Gfx/TextFormatD2D_Test.cpp

@@ -0,0 +1,75 @@
+/*
+  Copyright (C) 2013 Birunthan Mohanathas
+
+  This program is free software; you can redistribute it and/or
+  modify it under the terms of the GNU General Public License
+  as published by the Free Software Foundation; either version 2
+  of the License, or (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+*/
+
+#include "Canvas.h"
+#include "TextFormatD2D.h"
+#include <CppUnitTest.h>
+#include <memory>
+
+using namespace Microsoft::VisualStudio::CppUnitTestFramework;
+
+namespace Gfx {
+
+TEST_CLASS(Common_Gfx_TextFormatD2D_Test)
+{
+public:
+	std::unique_ptr<Canvas> m_D2D;
+
+	Common_Gfx_TextFormatD2D_Test() :
+		m_D2D(Canvas::Create(Gfx::Renderer::D2D))
+	{
+		// TODO: Handle this in CanvasD2D.
+		ULONG_PTR gdiplusToken;
+		Gdiplus::GdiplusStartupInput gdiplusStartupInput;
+		Gdiplus::GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, nullptr);
+
+		m_D2D->Resize(10, 10);
+		m_D2D->SetAntiAliasing(true);
+	}
+
+	TEST_METHOD(TestInaccurateText)
+	{
+		std::unique_ptr<TextFormatD2D> textFormat((TextFormatD2D*)m_D2D->CreateTextFormat());
+		textFormat->SetProperties(L"Arial", 10, false, false, nullptr);
+
+		DWRITE_TEXT_METRICS metrics = textFormat->GetMetrics(L"test", 4, true);
+		Assert::AreEqual(26, (int)metrics.width);
+		Assert::AreEqual(16, (int)metrics.height);
+
+		metrics = textFormat->GetMetrics(L"test", 4, false);
+		Assert::AreEqual(21, (int)metrics.width);
+		Assert::AreEqual(14, (int)metrics.height);
+	}
+
+	TEST_METHOD(TestTrailingNewlineGdipCompatibility)
+	{
+		std::unique_ptr<TextFormatD2D> textFormat((TextFormatD2D*)m_D2D->CreateTextFormat());
+		textFormat->SetProperties(L"Arial", 10, false, false, nullptr);
+
+		DWRITE_TEXT_METRICS metrics = textFormat->GetMetrics(L"test\n", 5, false);
+		Assert::AreEqual(15, (int)metrics.height);
+
+		metrics = textFormat->GetMetrics(L"test\n ", 6, false);
+		Assert::AreEqual(30, (int)metrics.height);
+
+		metrics = textFormat->GetMetrics(L"test\n\n", 6, false);
+		Assert::AreEqual(30, (int)metrics.height);
+	}
+};
+
+}  // namespace Gfx