用 rspec 测试康康康的能力

Question

我正在尝试使用 rspec

测试我的康康康舞能力

但与测试特定用户可以做什么相反，我正在尝试测试用户不应该做什么。

现在，我有一个这样的上下文块：

context "for a manager" do
  before do
    @manager = FactoryGirl.build(:user, :manager)
    @ability = Ability.new(@manager)
  end

  it "should not be able to create Questions" do
    expect(@ability).not_to be_able_to(:create, Question.new)
  end

  it "should not be able to read Questions" do
    expect(@ability).not_to be_able_to(:read, Question.new)
  end

  it "should not be able to update Questions" do
    expect(@ability).not_to be_able_to(:update, Question.new)
  end

  it "should not be able to delete Questions" do
    expect(@ability).not_to be_able_to(:destroy, Question.new)
  end
end

这清楚地表明 manager 类型的用户不应以任何形式访问 Question 模型。

有没有直接的方法将整个块写在一个 it 块中，只有一个 expect？

我想过这样写：

context "for a manager" do
  before do
    @manager = FactoryGirl.build(:user, :manager)
    @ability = Ability.new(@manager)
  end

  it "should not be able to manage Questions" do
    expect(@ability).not_to be_able_to(:manage, Question.new)
  end
end

但我认为这可能不一定会达到我的预期目的，因为此测试将通过与未授予该资源的一项能力一样多。

那么，简而言之，有没有直接的方法来测试这样的场景？感谢大家。

Answer 1

首先，我建议您使用下面示例中的 explicit subject for @ability so you can use the one-liner syntax。

describe Role do
  subject(:ability){ Ability.new(user) }
  let(:user){ FactoryGirl.build(:user, roles: [role]) }

  context "when is a manager" do
    let(:role){ FactoryGirl.build(:manager_role) }

    it{ is_expected.not_to be_able_to(:create, Question.new) }
    it{ is_expected.not_to be_able_to(:read, Question.new) }
    it{ is_expected.not_to be_able_to(:update, Question.new) }
    it{ is_expected.not_to be_able_to(:destroy, Question.new) }
  end
end

在您发表评论后更新

但您也可以将所有这 4 个期望总结为简单

%i[create read update destroy].each do |role|
  it{ is_expected.not_to be_able_to(role, Question.new) }
end

用 rspec 测试康康康的能力

Testing cancancan abilities with rspec

rspec

ruby-on-rails

rspec-rails

cancancan