Similarly the fact that you need to mock just os.Hostname and you know that
means you are probably testing implementation details which I wouldn’t do. As
I’ve pointed out before most of the Go stdlib tests are black box in a
different test package. I think you’ll create better more resilient tests that
way.
> On Aug 4, 2019, at 6:23 AM, Robert Engels <reng...@ix.netcom.com> wrote:
>
> In an ideal case got exported functions it would defer to the original.
>
> Still I think the package might have too many responsibilities if that’s the
> case.
>
>> On Aug 4, 2019, at 12:35 AM, Andrey Tcherepanov
>> <xnow4fippy...@sneakemail.com> wrote:
>>
>> what if you need only a subpart of the package to be mocked ?
>>
>>> On Thursday, August 1, 2019 at 5:29:30 PM UTC+3, Robert Engels wrote:
>>> That brings up an interesting idea. A ‘package replace’ during compile. So
>>> you request that the os package is replaced by osmock etc.
>>>
>>> This would allow easy general reuse mocking frameworks without changing the
>>> stdlib and all user code.
>>>
>>>> On Aug 1, 2019, at 8:38 AM, kyle...@sezzle.com wrote:
>>>>
>>>> You'll want to check out `gomock` and `mockgen`. You'll need to write an
>>>> interface to be able to mock, so you may need to write a receiver struct
>>>> to encapsulate os.Hostname() or whatever you need to mock, then mock your
>>>> HostnameGetter (surely a better name than that), maybe?
>>>>
>>>> type OsClient struct {}
>>>>
>>>> (o *OsClient) GetHostname() (string, error) { return os.Hostname() }
>>>>
>>>> type HostnameGetter interface { GetHostname() (string, error)}
>>>>
>>>>
>>>>
>>>> Here is repo w/ documentation: https://github.com/golang/mock
>>>>
>>>> And here are a couple other nice introductions:
>>>> - https://blog.codecentric.de/en/2017/08/gomock-tutorial/
>>>> - https://www.philosophicalhacker.com/post/getting-started-with-gomock/
>>>>
>>>>> On Thursday, August 1, 2019 at 7:09:54 AM UTC-5, Nitish Saboo wrote:
>>>>> Hi,
>>>>>
>>>>> How can we mock a function in Go like os.Hostname() or os.Getwd() ?
>>>>> Any framework or Library that we can use for mocking the function calls ?
>>>>>
>>>>> Thanks,
>>>>> Nitish
>>>>
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