无法连接到Microsoft远程调试监视器。(Unable to connect to the Microsoft Remote Debugging Monitor. A security package specific error occurred)

 首先，最好提取对User模型的find(:all, ...)调用。 例如，将其search 。 
 
class User < ActiveRecord::Base
  scope :search_by_email, lambda { |email|
    joins(:roles).where(["name IN (?) and email like '#{email}%'",["content team","ops team"]])
  }
end
 
 然后在控制器中使用它： 
 
def admin_search
   @admins = User.search_by_email(params[:email]).paginate(:page => params[:page], :per_page => 10)
end
 
 现在，您可以单独测试search_by_email方法 - 检查，它只返回“内容团队”和“操作团队”的结果，正确使用空电子邮件字符串等。 
 
 我不认为你必须测试paginate方法，因为它应该已经在kaminari，will_paginate或你使用的任何东西测试过。 但是如果你想确定它被调用，那么你可以在控制器规范中使用模拟期望（ should_receive ）。 
 
 编辑：规格如何看起来像 
 
describe User do
  describe ".search_by_email" do
    let(:content_team) { Role.create! name: "content team" }
    let(:ops_team)     { Role.create! name: "ops team"     }
    let(:another_team) { Role.create! name: "another team" }

    it "should search in content team" do
      content_team_user = User.create! email: "joe.black@example.com", roles: [content_team]
      User.search_by_email("black").should == [content_team_user]
    end

    it "should search in ops team" do
      ops_team_user = User.create! email: "joe.black@example.com", roles: [ops_team]
      User.search_by_email("black").should == [ops_team_user]
    end

    it "should not search in other teams" do
      other_team_user = User.create! email: "joe.black@example.com", roles: [another_team]
      User.search_by_email("black").should == []
    end

    it "should not search by empty string" do
      content_team_user = User.create! email: "joe.black@example.com", roles: [content_team_user]
      User.search_by_email("").should == []
      User.search_by_email(nil).should == []
    end

    # more specs for search...
  end
end


describe UsersController do
  describe "admin search" do
    let(:admin_user) { double(:admin_user).as_null_object }
    let(:search_string) { 'joe' }

    it "should search for admin users" do
      User.should_receive(:search_by_email).with(search_string).and_return([admin_user])
      get :admin_search, email: search_string
      assigns(:admins).should == [admin_user]
    end
  end
end

First of all, it's better to extract find(:all, ...) call to User model. Call it search, for instance.
 
class User < ActiveRecord::Base
  scope :search_by_email, lambda { |email|
    joins(:roles).where(["name IN (?) and email like '#{email}%'",["content team","ops team"]])
  }
end
 
Use it in the controller then:
 
def admin_search
   @admins = User.search_by_email(params[:email]).paginate(:page => params[:page], :per_page => 10)
end
 
Now, you can test the search_by_email method in isolation - check, that it returns result for "content team" and "ops team" only, correctly works with empty email string and so on.
 
I don't think you have to test paginate method, as it should be already tested in kaminari, will_paginate or whatever you use. But if you want to be sure, that it is being called, than you can use mock expectations (should_receive) in the controller specs.
 
EDIT: How the specs could look like
 
describe User do
  describe ".search_by_email" do
    let(:content_team) { Role.create! name: "content team" }
    let(:ops_team)     { Role.create! name: "ops team"     }
    let(:another_team) { Role.create! name: "another team" }

    it "should search in content team" do
      content_team_user = User.create! email: "joe.black@example.com", roles: [content_team]
      User.search_by_email("black").should == [content_team_user]
    end

    it "should search in ops team" do
      ops_team_user = User.create! email: "joe.black@example.com", roles: [ops_team]
      User.search_by_email("black").should == [ops_team_user]
    end

    it "should not search in other teams" do
      other_team_user = User.create! email: "joe.black@example.com", roles: [another_team]
      User.search_by_email("black").should == []
    end

    it "should not search by empty string" do
      content_team_user = User.create! email: "joe.black@example.com", roles: [content_team_user]
      User.search_by_email("").should == []
      User.search_by_email(nil).should == []
    end

    # more specs for search...
  end
end


describe UsersController do
  describe "admin search" do
    let(:admin_user) { double(:admin_user).as_null_object }
    let(:search_string) { 'joe' }

    it "should search for admin users" do
      User.should_receive(:search_by_email).with(search_string).and_return([admin_user])
      get :admin_search, email: search_string
      assigns(:admins).should == [admin_user]
    end
  end
end