public void GetInstalledVersions_ReturnsAllInstalledVersions()
{
string[] expectedVersions = {"1.0.0", "2.0.0", "3.1.1"};
structureManager.CreateVersionDir("1.0.0");
structureManager.CreateVersionDir("2.0.0");
structureManager.CreateVersionDir("3.1.1");
string[] versions = structureManager.GetInstalledVersions();
Assert.That(versions, Is.EqualTo(expectedVersions));
}