Yes, that's what I wanted to do, but it looks very tedious at best. In
"normal" unit tests, it's simple: import the package you're using, inject
its functions, reuse its types and constants.
But here ,since under non-windows platforms, I can't import the package, it
means I have to define wrappers for everything I use: types, constants,
functions. And when a function gets a channel in argument, the wrapper is
much more than a trivial one liner, it often needs a goroutine.
For example, let's say you want to unit test MyFunction, which calls
foo.Bar(chan foo.Baz, chan foo.Foobar) and foo compiles only under a single
OS. If you want to write a portable unit test for MyFunction, you can't
import foo. So you have to wrap everything in foo. And since you can't
have the wrappers take a foo.Baz or foo.Foobar argument, the wrapper for
foo.Bar will be non-trivial, it will require to read/write from both
channels, convert whatever comes in/out of them into your wrapper type...
That's a lot of manual work, and it's error prone. I suppose there's a
better way to do that than to wrap everything manually?
On Tuesday, January 4, 2022 at 7:51:25 PM UTC kortschak wrote:
> On Tue, 2022-01-04 at 08:29 -0800, Brieuc Jeunhomme wrote:
> > Hi,
> >
> > I'm writing code that uses the golang.org/x/sys/windows/svc package.
> > This package compiles only for windows builds, for other GOOS values,
> > I get a build error. That's fair, but I'm wondering how to unit test
> > the code that calls svc functions when working on a non-windows
> > environment. So code that looks like:
> >
> > func myFunction() {
> > svc.Foo(make(chan svc.Bar))
> > }
> >
> > Is there a well known way to do that, or am I missing something
>
> You can use build constraints, for example `// +build windows` and `//
> +build !windows` to selectively build the tests only on the desired
> platform[1].
>
>
> [1]https://pkg.go.dev/cmd/go#hdr-Build_constraints
>
>
>
>
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