public void GetLastValidVersion_ReturnsTheVersion()
{
string data = @"<config><version>1.2.3</version><last_version>3.1.1</last_version></config>";
File.WriteAllText(Path.Combine(baseDir, "config.xml"), data);
string lastVersion = structureManager.GetLastValidVersion();
Assert.That(lastVersion, Is.EqualTo("3.1.1"));
}