public bool HasBeenInstalled_(MachinePrerequisite machinePreq, IFixture fixture)
{
// Arrange
var mwInstllr = fixture.NewMachineWideInstaller();
// Act, Assert
var result = mwInstllr.HasBeenInstalled(machinePreq);
fixture.Freeze<Mock<IEnvironmentRepository>>().VerifyAll();
return result;
}