Procedure to test locally

[ruchisaluja]

Hi all
I am building the shell project in Golang. But I am unable to test it on local Windows environment. Installed Golang version : 1.23.4
Golang version used by Codecrafters tester : 1.22.10
I changed the version in the go.mod file to 1.23.4 and run go mod tidy after that. But no packages are added to go.mod file. I need some help figuring out the issue in my local setup. TIA!

[andy1li]

Hi @ruchisaluja, could you confirm what error messages you’re seeing?

Please note that our testers are run on Linux, so you might need to install WSL to test on Windows.

[frozar]

@andy1li
I also try to run tests locally with golang. I just get back to my first submission for a challenge and try to create a test file serve_test.go. Here the code:

When I try to launch the test with the command go test app/server_test.go, I get:

# command-line-arguments [command-line-arguments.test]
app/server_test.go:9:9: undefined: Hello
FAIL	command-line-arguments [build failed]
FAIL

You can see that I tried to import the main module at the 5 line of server_test.go but it has no chance to work this way.

I also don’t find documentation of this topic at:

Go - CodeCrafters

Do you have any clue for me too be able to run test locally in golang? It would enable users to write code in a TDD fashion which is a good way to develop a project

[frozar]

Hi @andy1li, I just wonder if you had time to read my message and if it was understandable.

Do you think it is in your roadmap for golang?

[frozar]

I finally got a synthetic example where I can run a golang unit test in a codecrafters challenge. Here is an image where you can see every part of my tiny test example:

In the pink rectangle, you can see that I have 2 files in my app directory, server.go and server_test.go. In the green rectangles, you can see I have a functionToTest() that returns a string and a TestHello() that tests this function. So now, at the root of the repository, I can run this test with the following command:

$ go test ./app                                                    
ok  	github.com/codecrafters-io/kafka-starter-go/app	0.003s

If you want more details:

$ go test -v ./app
=== RUN   TestHello
--- PASS: TestHello (0.00s)
PASS
ok  	github.com/codecrafters-io/kafka-starter-go/app	0.002s

What is confusing is that if you give directly the path of the test source file, you will get this error:

$ go test ./app/server_test.go  
# command-line-arguments [command-line-arguments.test]
app/server_test.go:8:9: undefined: functionToTest
FAIL	command-line-arguments [build failed]
FAIL

You want to test a subdirectory, foo, of app directory, you just have to give its path on the command line:

$ go test ./app/foo

@andy1li IMHO, this topic is solved.