PowerMockito and Mockito conflict - junit

Question

I need to built unit tests (with junit) for a legacy system. The method that I need to test, makes use of a static method and I need to check if it's called. So, I'll need to use PowerMockito (for "regular" mocking, we use mockito).
But, when I include PowerMockito statements inside the test, Mockito fails with an org.mockito.exceptions.misusing.UnfinishedStubbingException. If I comment the lines PowerMockito.mockStatic(Application.class), PowerMockito.doNothing().when(Application.class) and PowerMockito.verifyStatic(), the UnfinishedStubbingExceptiondoes does not occur, but this way, I'm not able to check if my IllegalArgumentException occured.
The method under test looks like:
public class ClientMB {
public void loadClient(Client client) {
try {
if (client == null) {
throw new IllegalArgumentException("Client is mandatory!");
}
setClient(clientService.findById(client.getId()));
} catch (Exception ex) {
Application.handleException(ex);
}
}
}
And the test looks like:
#PrepareForTest({ Application.class })
#RunWith(PowerMockRunner.class)
public class ClientMBTest {
#Test
public final void testLoadClient() {
ClientService mockedClientService = Mockito.mock(ClientService.class);
Mockito.when(mockedClientService.findById(42L)).thenReturn(new Client());
PowerMockito.mockStatic(Application.class);
PowerMockito.doNothing().when(Application.class);
ClientMB cmb = new ClientMB(mockedClientService);
mb.loadClient(null);
PowerMockito.verifyStatic();
}
}
I imported PowerMokito using the latest version.
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-module-junit4</artifactId>
<version>1.6.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.powermock</groupId>
<artifactId>powermock-api-mockito</artifactId>
<version>1.6.2</version>
<scope>test</scope>
</dependency>
What I'm doing wrong? Any advice is welcome.

Answer 1

PowerMockito.doNothing().when(Application.class);
That's a stubbing command, but because you don't make a method call after the when(...), it's unfinished.
PowerMockito.doNothing().when(Application.class);
Application.someApplicationMethod();
You need to use this syntax because the normal doVerb().when(foo) syntax will provide an instance, and Java often issues a warning when trying to call a static method based on an instance instead of a class name.
If you want to stub all of Application's methods, you can do so by passing another argument into mockStatic:
PowerMockito.mockStatic(Application.class, RETURNS_SMART_NULLS);