On Wednesday, 22 August 2018 at 08:33:36 UTC, Andrey wrote:
Hello,
I know that D has build-in unit tests. If so, what mechanism D
provides for mocking objects?
For example:
struct WebParser
{
// ...
int download(string path)
{
SomeHttpClient client(path);
auto result = client.request(path, 10, "Qwerty");
// ...
return result.getSomething();
}
}
Here I want to replace struct/class SomeHttpClient from
3d-party library with my own test implementation. Something
like this maybe:
unittest
{
SomeMagicMockMechanism!(SomeHttpClient, MyMockedClient);
WebParser parser;
auto value = parser.download("www.example.com"); // uses
MyMockedClient.request
assert(value == 10);
}
The language itself does not offer mocking capabilities. However,
there are excellent libraries in Dub:
https://code.dlang.org/packages/unit-threaded
https://code.dlang.org/packages/dmocks
--
Simen
