Where to place test helper functions?

[mendlock]

I have multiple tests that are using the same functions, mostly mocking and stubbing functionality. Where should such things be placed? Is there any idiomatic place to store these?

[GonzaSaya (Gonzalo Sayago)]

Hi mendlock, you should create a file for the test functions with a specific name. For example, If you have a function named “newDeck” you should create a function “TestNewDeck” in another file.
Here is the Golang Test
Also I attach one example.
You can also run “Go test” to run these test and creates a report with the results.
Regards

[mendlock]

Thanks!

I’ve understood as much. I think.
But let’s say I have two test files:

main_test.go
user_test.go

On both of those is using a function that is only for test purposes and needed by many tests.

Let’s say a function to create a mocked User if some kind.
Where should I put that?

[GonzaSaya (Gonzalo Sayago)]

Hi, I am not sure if there is any specification for golang testing.
I believe you should create different files for unit testing, integration testing, and system testing.
Check the following link.

[johandalabacka (Johan Dahl)]

You can have multiple _test.go files. And if you run “go test” inside a folder will it find all tests. For example i have three files main.go, main_test.go and mock_test.go and then runs go test -v (-v verbose) it will find the test in main_test.go and the struct in mock_test.go and output this:

$ go test -v
=== RUN   TestUsername
--- PASS: TestUsername (0.00s)
PASS
ok      _/Users/xxx/projects/zzz       0.008s

mock_test.go

package main

type MockUser struct {
}

func (u MockUser) Name() string {
	return "Peter"
}

main_test.go

package main

import "testing"

func TestUsername(t *testing.T) {
	u := MockUser{}
	name := u.Name()

	if name != "Peter" {
		t.Errorf("wanted Peter got %s", name)
	}
}

And you could use the Mockuser in more _test.go files if you want to

[mendlock]

Thanks!