規範運行不同的配置同一套測試

Question

假設包含了大量的測試SPEC文件：

before(:all) do 
    @object = buildObjectA 
end 

it 'should compute x correctly' do 
    test something based on object 
end 

it 'should compute y correctly' do 
    test something based on object 
end 

我想要做相同的一組測試，但有不同的配置，例如，之前（：全部），它看起來像這樣：

before(:all) do 
    @object = buildObjectB 
end 

這樣做的最佳方法是什麼？

Answer 1

您可以使用Shared Examples and Contexts：

RSpec.shared_examples "something" do |x| 
    it 'should compute x correctly' do 
    test something based on object 
    end 

    it 'should compute y correctly' do 
    test something based on object 
    end 
end 

RSpec.describe "A" do 
    include_examples "something", buildObjectA 
end 

RSpec.describe "B" do 
    include_examples "something", buildObjectB 
end 

（給你的測試是兩個對象都是一樣的）

Answer 2

我想你會想要使用context。就像describe一樣，但是它的語義名稱更適合像你這樣的情況。

context 'when object is A' do 
    before(:all) do 
    @object = buildObjectA 
    end 

    it 'should compute x correctly' do 
    test something based on object 
    end 

    it 'should compute y correctly' do 
    test something based on object 
    end 
end 

context 'when object is B' do 
    before(:all) do 
    @object = buildObjectB 
    end 

    it 'should compute x correctly' do 
    test something based on object 
    end 

    it 'should compute y correctly' do 
    test something based on object 
    end 
end 

當你的測試失敗，它將鏈中的所有describe，context和it參數，並給你測試例子充分說明。