Thank you Gregor for your quick reply!
Anything special I need to think about this go routine logic in my unit
test. It might be still running after test returns..?
On Thursday, September 10, 2020 at 5:26:13 PM UTC+10 be...@pferdewetten.de
wrote:
> If I were you, I'd pass in an interface value to functionA with the
> signature
>
> type Ber interface{
> functionB(io.Reader, io.Writer)
> }
>
> (assuming that zipReader is an io.Reader, zipWriter is an io.Writer, you
> may have to adjust this a bit).
>
> Then make your mock functionB a method on a type that implements the Ber
> interface, the same for the real functionB. In unit tests, pass in an
> instance of the type with the mock method, in real life, pass in an
> instance of the type with the real method.
>
> Note that the types could be as simple as
>
> type mockB struct{}
> func (m mockB) functionB(...)
>
> On 10.09.20 09:15, Yvonne Zhang wrote:
> > Hi,
> > I have a function streaming a zipreader to browser. It is like this.
> > func functionA(....)(body io.ReadCloser, err error){
> >
> > // some logic to get a zipreader
> >
> > body, pipeWriter := io.Pipe()
> > zipWriter := zip.NewWriter(pipeWriter)
> >
> > go func(){
> > // err := functionB(zipReader, zipWriter)call another function to
> > prepare files and write to zipwriter
> > If err != nil{
> > zipWriter.Close()
> > _ = pipeWriter.CloseWithError(err)
> > return
> > }
> > zipWriter.Close()
> > pipeWriter.Close()
> > }()
> > return
> > }
> >
> > My question is about unit test about this functionA. I have mock for
> > functionB. How do I write unit test for functionA with the mock
> > functionB. It seems my unit test does not work well when it goes into
> > the goroutine.
> > Many thanks!
> >
> > --
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>
> > <
> https://groups.google.com/d/msgid/golang-nuts/4ca0817a-f1f7-44a9-be3d-3584bcb61b8an%40googlegroups.com?utm_medium=email&utm_source=footer
> >.
>
> --
> Gregor Best
> be...@pferdewetten.de
>
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