Unit tests: Add type to string converters for doctest checks

Tests/Source/Common/TypesToString.h

@@ -0,0 +1,60 @@
+/*
+ * This source file is part of RmlUi, the HTML/CSS Interface Middleware
+ *
+ * For the latest information, see http://github.com/mikke89/RmlUi
+ *
+ * Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
+ * Copyright (c) 2019 The RmlUi Team, and contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+#ifndef RMLUI_TESTS_COMMON_TYPESTOSTRING_H
+#define RMLUI_TESTS_COMMON_TYPESTOSTRING_H
+
+#include <RmlUi/Core/TypeConverter.h>
+#include <RmlUi/Core/Types.h>
+#include <doctest.h>
+#include <ostream>
+
+/*
+ *   Provides string conversion of types for doctest.
+ */
+namespace Rml {
+
+std::ostream& operator<<(std::ostream& os, const Colourb& value)
+{
+	os << ToString(value);
+	return os;
+}
+std::ostream& operator<<(std::ostream& os, const Vector2f& value)
+{
+	os << ToString(value);
+	return os;
+}
+std::ostream& operator<<(std::ostream& os, const Vector2i& value)
+{
+	os << ToString(value);
+	return os;
+}
+
+} // namespace Rml
+
+#endif

Tests/Source/UnitTests/Element.cpp

@@ -28,6 +28,7 @@
 
 #include "../Common/Mocks.h"
 #include "../Common/TestsShell.h"
+#include "../Common/TypesToString.h"
 #include <RmlUi/Core/Context.h>
 #include <RmlUi/Core/Element.h>
 #include <RmlUi/Core/ElementDocument.h>