UnitTests: Add build script and move current tests to "tests/Engine" directory (from "tests/Nazara")

Former-commit-id: 5639305bbdbb69ad6f6f282df6c6de930220b57f

tests/Engine/Core/Directory.cpp

@@ -0,0 +1,34 @@
+#include <Nazara/Core/Directory.hpp>
+#include <Catch/catch.hpp>
+
+SCENARIO("Directory", "[CORE][DIRECTORY]")
+{
+	GIVEN("The current directory")
+	{
+		NzDirectory currentDirectory(NzDirectory::GetCurrent());
+		CHECK(currentDirectory.Exists());
+		currentDirectory.Open();
+
+		WHEN("We create a new directory Test Directory")
+		{
+			NzDirectory::Create("Test Directory");
+
+			THEN("A new directory has been created")
+			{
+				CHECK(NzDirectory::Exists(currentDirectory.GetCurrent() + "/Test Directory"));
+				CHECK(currentDirectory.IsOpen());
+			}
+		}
+
+		AND_WHEN("We delete it")
+		{
+			NzDirectory::Remove(currentDirectory.GetCurrent() + "/Test Directory", true);
+
+			THEN("It doesn't exist anymore")
+			{
+				CHECK(!NzDirectory::Exists(currentDirectory.GetCurrent() + "/Test Directory"));
+			}
+		}
+	}
+}
+