```ruby
require 'spec_helper'

describe User do
  it "should return login on User.login" do
    user = User.create!(:email => 'icesik@altlinux.org',
                        :password => 'password',
                        :password_confirmation => 'password')
    user.confirmed_at = Time.zone.now
    user.save!
    user.login.should == 'icesik'
  end

  it "should return true for altlinux team member" do
    user = User.create!(:email => 'icesik@altlinux.org',
                        :password => 'password',
                        :password_confirmation => 'password')
    user.confirmed_at = Time.zone.now
    user.save!
    user.is_alt_team?.should be_true
  end

  it "should return false for non altlinux team member" do
    user = User.create!(:email => 'user@email.com',
                        :password => 'password',
                        :password_confirmation => 'password')
    user.confirmed_at = Time.zone.now
    user.save!
    user.is_alt_team?.should be_false
  end

  it "should deny change email" do
    user = User.create!(:email => 'user@email.com',
                        :password => 'password',
                        :password_confirmation => 'password')
    user.confirmed_at = Time.zone.now
    user.save!
    user.email = 'icesik@altlinux.org'
    user.save.should be_false
  end
end
```

Add more specs for User model
user
```ruby
require 'spec_helper'

describe User do
  it "should return login on User.login" do
    user = User.create!(:email => 'icesik@altlinux.org',
                        :password => 'password',
                        :password_confirmation => 'password')
    user.confirmed_at = Time.zone.now
    user.save!
    user.login.should == 'icesik'
  end

  it "should return true for @altlinux.org emails" do
    user = User.create!(:email => 'icesik@altlinux.org',
                        :password => 'password',
                        :password_confirmation => 'password')
    user.confirmed_at = Time.zone.now
    user.save!
    user.is_alt_team?.should be_true
  end

  it "should return true for @altlinux.ru emails" do
    user = User.create!(:email => 'icesik@altlinux.ru',
                        :password => 'password',
                        :password_confirmation => 'password')
    user.confirmed_at = Time.zone.now
    user.save!
    user.is_alt_team?.should be_true
  end

  it "should return false for non altlinux team member" do
    user = User.create!(:email => 'user@email.com',
                        :password => 'password',
                        :password_confirmation => 'password')
    user.confirmed_at = Time.zone.now
    user.save!
    user.is_alt_team?.should be_false
  end

  it "should deny change email" do
    user = User.create!(:email => 'user@email.com',
                        :password => 'password',
                        :password_confirmation => 'password')
    user.confirmed_at = Time.zone.now
    user.save!
    user.email = 'icesik@altlinux.org'
    user.save.should be_false
  end
end
```
assistant