Myujth

I started working with Go a month go. I come from java/kotlin background and I would like to understand if it's possible to achieve some of the same stuff that I did in those languages even in Go.

My current problem is this one.

I have a set of integration test cases where I need to initialize some stuff and then clean the resources: a common use case, I believe.

Here's some pseudo code of what I want achieve, if possible:

for each test 
 init resources
 run test 
 init test resources
 execute method under test
 assert
 
 clean resources

At the moment, what I could try, was this approach:

func TestMain(m *testing.M) 
 setup()
 code := m.Run() 
 shutdown()
 os.Exit(code)

Which is fine generally speaking if not that it runs at package level. That doesn't give me much control at the moment because I would like to run one of those per test files. (that's what I noticed at least, please let me know if I'm wrong about it)

At the moment what I'm doing is basically run initialization for each test, but that's really a lot of duplicated code:

address, tearDownTestCase := testutils.SetupTestCase(emptyContext, postRouter(login.LoginUser), "/login")
defer tearDownTestCase()
// init test use case data
// run test
// clean use case data

Do you think there is a better approach?

Go does not have the inbuilt functionality to support tear up and down methods. However, there are multiple third-party packages that enable this. Out of all of these, I like the ginkgo package the most. It is very expressive and avoids code duplication.

A sample test would look like

var _ = Describe("Book", func() 
 var (
 longBook Book
 shortBook Book
 )

 BeforeEach(func() 
 longBook = Book
 Title: "Les Miserables",
 Author: "Victor Hugo",
 Pages: 1488,
 

 shortBook = Book
 Title: "Fox In Socks",
 Author: "Dr. Seuss",
 Pages: 24,
 
 )

 Describe("Categorizing book length", func() 
 Context("With more than 300 pages", func() 
 It("should be a novel", func() 
 Expect(longBook.CategoryByLength()).To(Equal("NOVEL"))
 )
 )

 Context("With fewer than 300 pages", func() 
 It("should be a short story", func() 
 Expect(shortBook.CategoryByLength()).To(Equal("SHORT STORY"))
 )
 )
 )
)

Similarity there are other lifecycle methods like afterEach, justBeforeEach etc.