Question

I have:

Map<String, String> vars = new HashMap<String, String>();
String r = restOperations.getForObject(url, String.class, vars);

In my test I try to mock RestOperations:

@Mock
RestOperations restOperations;

when(restOperations.getForObject(Matchers.anyString(), Matchers.eq(String.class), Matchers.notNull())).thenReturn("ok");

This never get triggered.

Does anyboy see why?

Answer 1

I believe the problem is with method overloading. getForObject has two overloaded versions taking three arguments:

<T> T getForObject(String url, Class<T> responseType, Map<String, ?> uriVariables);

<T> T getForObject(String url, Class<T> responseType, Object... uriVariables);

You are actually mocking the second one while you want to mock the first one. To help the static method resolution cast the notNull() matches explicitly:

when(restOperations.getForObject(
  Matchers.anyString(), Matchers.eq(String.class), (Map)Matchers.notNull())
).thenReturn("ok");

Or even better, use anyMap():

 when(restOperations.getForObject(
   Matchers.anyString(), Matchers.eq(String.class), Matchers.anyMap())
 ).thenReturn("ok");