assert_select "user", :count => 1 do
assert_select "user[id='#{user1.id}']", :count => 1
assert_select "user[id='#{user2.id}']", :count => 0
assert_select "user", :count => 1 do
assert_select "user[id='#{user1.id}']", :count => 1
assert_select "user[id='#{user2.id}']", :count => 0