Question

我正在尝试测试我的一个布尔字符串方法，但是我收到了以下错误：

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

有什么想法吗？

Answer 1

to来电应遵循expect()，而非实际方法。变化

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，你需要先关闭括号：

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

如果你喜欢威廉·莎士比亚，你也可以这样写：

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

Rspec＆amp; Rails：未定义的方法`to'for true：TrueClass

2 个答案: