java - How to mock Void Call? -


in api (with retrofit) have lot of requests this: 

public call<void> postasyncreservedevice(@nonnull reservedworkerdata data, @nonnull string token) {          return apiservice.postreservedworker(                 data,                 apiprefs.token_prefix + token); }

where ignore result of response - successful or not , important.

but faced problem in unit test. need mock api answer:

@test public void test() { //... when(apiservice.postasyncreservedevice(                 eq(data), any(string.class)))                 .thenreturn(calls.response(any() void)) //... }

looks good, when run test case see error: 

java.lang.classcastexception: java.lang.object cannot cast java.lang.void

how mock , test such methods in api?

the method returns call<void>, why not return in mocked method : mockito.any(call.class) ?

for example : 

mockito.when(mock.postasyncreservedevice()).thenreturn(mockito.any(call.class));

while produce warning @ compile time declares raw call.


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