Rspec的和Rails的：未定义的方法`到”真正：TrueClass

Question

我想测试我的布尔字符串的方法之一，但我得到了波纹管错误：

undefined method `to' for true:TrueClass 

describe 'is_tall?' do 

    it "should return true for a tall user" do 
    expect(tall_user_string.is_tall?.to be_truthy) 
    end 

    it "should return false for a short user" do 
    expect(user_string.is_tall?.to be_falsey) 
    end 

end 

任何想法？

Answer 1

to调用应遵循expect()，而不是真正的方法。更改

describe 'is_tall?' do 

    it "should return true for a tall user" do 
    expect(tall_user_string.is_tall?.to be_truthy) 
    end 

    it "should return false for a short user" do 
    expect(user_string.is_tall?.to be_falsey) 
    end 

end 

到

describe 'is_tall?' do 

    it "should return true for a tall user" do 
    expect(tall_user_string.is_tall?).to be_truthy 
    end 

    it "should return false for a short user" do 
    expect(user_string.is_tall?).to be_falsey 
    end 

end 

Answer 2

你有一个小错字，你需要提前关闭括号：

describe 'is_tall?' do 
    it "should return true for a tall user" do 
    expect(tall_user_string.is_tall?).to be_truthy 
    end 

    it "should return false for a short user" do 
    expect(user_string.is_tall?).to be_falsey 
    end 
end 

，如果你喜欢莎士比亚，你也可以写这样的：

describe 'is_tall?' do 
    it "should return true for a tall user" do 
    expect(tall_user_string.is_tall?).to be 
    end 

    it "should return false for a short user" do 
    expect(user_string.is_tall?).not_to be 
    end 
end