/// <summary>
/// Leave the specified role.
/// After calling this method, your role will be disposed
/// and the reference to <paramref name="role"/> will be set to <value>null</value>.
/// </summary>
/// <remarks>
/// <para>
/// The role will be disposed when the number of call to <see cref="Achieve{TRole}(TRole)"/>
/// will be balanced with the calls to this method.
/// </para>
/// <para>
/// In other world you must leave the achieved roles exactly the same number of times you achieved each one.
/// </para>
/// </remarks>
/// <param name='role'>
/// User's role to be disposed.
/// </param>
/// <typeparam name='TRole'>
/// The type of the role to leave.
/// </typeparam>
/// <exception cref="ArgumentNullException">The <paramref name="role"/> is <value>null</value>.</exception>
/// <exception cref="ArgumentException">The <paramref name="role"/> is unknown to the session.</exception>
public void Leave <TRole> (ref TRole role) where TRole : class
{
ThrowAfterDisposition();
if (null == role)
{
throw new ArgumentNullException("role");
}
Type roleType = typeof(TRole);
RoleRef roleRef = null;
if (!_roles.TryGetValue(roleType, out roleRef))
{
string message = string.Format("Unknown role type {0}.", roleType.FullName);
throw new ArgumentException(message, "role");
}
if (!object.ReferenceEquals(role, roleRef.Role))
{
string message = string.Format("Unknown role {0}.", roleType.FullName);
throw new ArgumentException(message, "role");
}
if (roleRef.Decrease() == 0)
{
_roles.Remove(roleType);
roleRef.Dispose();
}
role = null;
}
public void Decrease_underZero_throwsInvalidOperationException()
{
// arrange:
RoleBase role = MockRepository.GenerateStrictMock <RoleBase>();
RoleRef roleRef = new RoleRef(role);
// assert:
Assert.Throws <InvalidOperationException>(delegate { roleRef.Decrease(); });
}
public void Decrease_decreaseTheNumberOfReferences()
{
// arrange:
RoleBase role = MockRepository.GenerateStrictMock <RoleBase>();
RoleRef roleRef = new RoleRef(role);
// assert:
for (int i = 0; i < 100; ++i)
{
roleRef.Increase();
Assert.AreEqual(0, roleRef.Decrease());
}
for (int i = 0; i < 100; ++i)
{
roleRef.Increase();
}
for (int i = 0; i < 100; ++i)
{
Assert.AreEqual(100 - (i + 1), roleRef.Decrease());
}
}
public void Decrease_decreaseTheNumberOfReferences()
{
// arrange:
RoleBase role = MockRepository.GenerateStrictMock<RoleBase>();
RoleRef roleRef = new RoleRef(role);
// assert:
for(int i = 0; i < 100; ++i)
{
roleRef.Increase();
Assert.AreEqual(0, roleRef.Decrease());
}
for(int i = 0; i < 100; ++i)
roleRef.Increase();
for(int i = 0; i < 100; ++i)
{
Assert.AreEqual(100 - (i+1), roleRef.Decrease());
}
}
public void Decrease_underZero_throwsInvalidOperationException()
{
// arrange:
RoleBase role = MockRepository.GenerateStrictMock<RoleBase>();
RoleRef roleRef = new RoleRef(role);
// assert:
Assert.Throws<InvalidOperationException>(delegate{ roleRef.Decrease(); });
}
