使用RSpec和工廠測試模型的方法

我有一個模型的吸氣劑/ setter方法檢索的陣列的最後一個元素，並添加到陣列（字符串的PostgreSQL的數組）：使用RSpec和工廠測試模型的方法

# return the last address from the array 
def current_address 
    addresses && addresses.last 
end 

# add the current address to the array of addresses 
# if the current address is not blank and is not the same as the last address 
def current_address=(value) 
    addresses ||= [] 
    if value && value != addresses.last 
    addresses << value 
    end 
    write_attribute(:addresses, addresses) 
end

的方法出現要正常工作。我正在學習Rspec/Factory並試圖對此進行測試。測試失敗，我會很感激一些建議，我應該怎麼做：

it "adds to the list of addresses if the student's address changes" do 
    student = build(:student) 
    student.current_address = "first address" 
    student.current_address = "second address" 
    student.addresses.count.should == 2 
end 

Failure/Error: student.addresses.count.should == 2 
    expected: 2 
      got: 1 (using ==) 

it "provides the student's current address" do 
    student = build(:student) 
    student.current_address = "first address" 
    student.current_address = "second address" 
    student.current_address = "" 
    student.current_address.should == "second address" 
end 

Failure/Error: student.current_address.should == "second address" 
    expected: "second address" 
      got: "" (using ==)

在此先感謝

UPDATE：謝謝你，它通過測試我的修改方法如下：

# return the last address from the array 
def current_address 
    addresses && addresses.last 
end 

# add the current address to the array of addresses 
# if the current address is not blank and is not the same as the last address 
def current_address=(value) 
    list = self.addresses 
    list ||= [] 
    if !value.empty? && value != list.last 
    list << value 
    end 
    write_attribute(:addresses, list) 
end

來源

2013-03-23 d_a_n

看起來像addresses只在本地範圍內，所以每次您撥打current_address=它都會被清除。嘗試self.addresses。

來源

2013-03-23 10:31:07

謝謝你，在我的重構setter方法，以使其更具可讀性什麼建議嗎？測試通過了，但在最初通過self.addresses重寫了方法之後，通過了所有測試，但在提交學生表單時沒有更新數據庫 - 是否有更好的方法來測試setter實際上是否更新了寫入的數據庫只是有興趣，上面的方法正確寫入）。再次感謝 – 2013-03-23 11:29:37

在對象上調用'reload'，您將能夠確認地址是否正確保存。 – 2013-03-23 11:54:19

謝謝安迪，工作。 – 2013-03-23 12:31:38

這是我認爲這是錯誤的。

在您的測試中，不是將數組添加到數組中，而是替換它，因爲您正在爲其分配新值。

student.current_address = "first address" 
student.current_address = "second address"

，我認爲你應該做的就是添加一個新的元素，你在你的代碼addresses << value

來源

2013-03-23 10:48:19 PericlesTheo

謝謝。這樣做可行，但不會測試我的setter方法。 – 2013-03-23 11:32:32

使用RSpec和工廠測試模型的方法

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