My main acts just like a mini bootstrap to do as less as possible and hand
the real action over to start.Run()
But is is still testable.
```
var mainRunner = runner
/* -------------------------- Methods/Functions ---------------------- */
// runner starts the application and can be overwritten in a test for
mocking.
func runner() error {
return start.Run() //nolint:wrapcheck // not needed here
}
/*
main is the bootstrap of the application.
*/
func main() {
err := mainRunner()
if err != nil {
fmt.Println("Error:\n", libErrors.GetError(err))
}
}
```
In an internal test, the mainRunner is mocked and can emulate an error if
needed.
func Test_Main_Error(t *testing.T) {
mainRunner = func() error {
return errors.New("test error")
}
defer func() {
mainRunner = runner
}()
captured := libCapture.Direct(func() {
main()
})
assert.Contains(t, captured, "test error")
}
Op donderdag 15 februari 2024 om 10:05:11 UTC+1 schreef Brian Candler:
> On Thursday 15 February 2024 at 00:08:44 UTC Jerry Londergaard wrote:
>
> If code is outside of the main function but still in the main package, it
> seems its testable like other functions?
>
>
> Yes indeed.
>
>
> I suspect though if one is putting tests in package main_test, then I
> guess you can't import the main package to test it :(
>
>
> Works fine as far as I can see:
> https://go.dev/play/p/7UtYP2j8hg6
>
> (Tests don't run in the playground, unless you explicitly invoke a runner,
> but you can run this locally to demonstrate)
>
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