CompilationWarningsTest.java revision 2637d96c202372854a7c71466ddcc6e90fc4fc53 
1package org.mockitousage;
2
3import org.junit.Before;
4import org.junit.Test;
5import org.mockito.invocation.InvocationOnMock;
6import org.mockito.stubbing.Answer;
7
8import static org.mockito.BDDMockito.*;
9
10
11public class CompilationWarningsTest {
12
13    @Before
14    public void pay_attention_to_compilation_warnings_and_JDK_version() {
15    }
16
17    @Test
18    public void no_warnings_for_most_common_api() throws Exception {
19        doReturn(null).when(mock(IMethods.class)).objectReturningMethodNoArgs();
20        doReturn("a", 12).when(mock(IMethods.class)).objectReturningMethodNoArgs();
21        doReturn(1000).when(mock(IMethods.class)).objectReturningMethodNoArgs();
22        doThrow(new NullPointerException()).when(mock(IMethods.class)).objectReturningMethodNoArgs();
23        doThrow(new NullPointerException(), new IllegalArgumentException()).when(mock(IMethods.class)).objectReturningMethodNoArgs();
24        doThrow(NullPointerException.class).when(mock(IMethods.class)).objectReturningMethodNoArgs();
25
26        doAnswer(ignore()).doReturn(null).when(mock(IMethods.class)).objectReturningMethodNoArgs();
27        doAnswer(ignore()).doReturn("a", 12).when(mock(IMethods.class)).objectReturningMethodNoArgs();
28        doAnswer(ignore()).doReturn(1000).when(mock(IMethods.class)).objectReturningMethodNoArgs();
29        doAnswer(ignore()).doThrow(new NullPointerException()).when(mock(IMethods.class)).objectReturningMethodNoArgs();
30        doAnswer(ignore()).doThrow(new NullPointerException(), new IllegalArgumentException()).when(mock(IMethods.class)).objectReturningMethodNoArgs();
31        doAnswer(ignore()).doThrow(NullPointerException.class).when(mock(IMethods.class)).objectReturningMethodNoArgs();
32
33        when(mock(IMethods.class).objectReturningMethodNoArgs()).thenReturn(null);
34        when(mock(IMethods.class).objectReturningMethodNoArgs()).thenReturn("a", 12L);
35        when(mock(IMethods.class).objectReturningMethodNoArgs()).thenReturn(1000);
36        when(mock(IMethods.class).objectReturningMethodNoArgs()).thenThrow(new NullPointerException());
37        when(mock(IMethods.class).objectReturningMethodNoArgs()).thenThrow(new NullPointerException(), new IllegalArgumentException());
38        when(mock(IMethods.class).objectReturningMethodNoArgs()).thenThrow(NullPointerException.class);
39
40        when(mock(IMethods.class).objectReturningMethodNoArgs()).then(ignore()).thenReturn(null);
41        when(mock(IMethods.class).objectReturningMethodNoArgs()).then(ignore()).thenReturn("a", 12L);
42        when(mock(IMethods.class).objectReturningMethodNoArgs()).then(ignore()).thenReturn(1000);
43        when(mock(IMethods.class).objectReturningMethodNoArgs()).then(ignore()).thenThrow(new NullPointerException());
44        when(mock(IMethods.class).objectReturningMethodNoArgs()).then(ignore()).thenThrow(new NullPointerException(), new IllegalArgumentException());
45        when(mock(IMethods.class).objectReturningMethodNoArgs()).then(ignore()).thenThrow(NullPointerException.class);
46
47        willReturn(null).given(mock(IMethods.class)).objectReturningMethodNoArgs();
48        willReturn("a", 12).given(mock(IMethods.class)).objectReturningMethodNoArgs();
49        willReturn(1000).given(mock(IMethods.class)).objectReturningMethodNoArgs();
50        willThrow(new NullPointerException()).given(mock(IMethods.class)).objectReturningMethodNoArgs();
51        willThrow(new NullPointerException(), new IllegalArgumentException()).given(mock(IMethods.class)).objectReturningMethodNoArgs();
52        willThrow(NullPointerException.class).given(mock(IMethods.class)).objectReturningMethodNoArgs();
53
54        willAnswer(ignore()).willReturn(null).given(mock(IMethods.class)).objectReturningMethodNoArgs();
55        willAnswer(ignore()).willReturn("a", 12).given(mock(IMethods.class)).objectReturningMethodNoArgs();
56        willAnswer(ignore()).willReturn(1000).given(mock(IMethods.class)).objectReturningMethodNoArgs();
57        willAnswer(ignore()).willThrow(new NullPointerException()).given(mock(IMethods.class)).objectReturningMethodNoArgs();
58        willAnswer(ignore()).willThrow(new NullPointerException(), new IllegalArgumentException()).given(mock(IMethods.class)).objectReturningMethodNoArgs();
59        willAnswer(ignore()).willThrow(NullPointerException.class).given(mock(IMethods.class)).objectReturningMethodNoArgs();
60
61        given(mock(IMethods.class).objectReturningMethodNoArgs()).willReturn(null);
62        given(mock(IMethods.class).objectReturningMethodNoArgs()).willReturn("a", 12L);
63        given(mock(IMethods.class).objectReturningMethodNoArgs()).willReturn(1000);
64        given(mock(IMethods.class).objectReturningMethodNoArgs()).willThrow(new NullPointerException());
65        given(mock(IMethods.class).objectReturningMethodNoArgs()).willThrow(new NullPointerException(), new IllegalArgumentException());
66        given(mock(IMethods.class).objectReturningMethodNoArgs()).willThrow(NullPointerException.class);
67
68        given(mock(IMethods.class).objectReturningMethodNoArgs()).will(ignore()).willReturn(null);
69        given(mock(IMethods.class).objectReturningMethodNoArgs()).will(ignore()).willReturn("a", 12L);
70        given(mock(IMethods.class).objectReturningMethodNoArgs()).will(ignore()).willReturn(1000);
71        given(mock(IMethods.class).objectReturningMethodNoArgs()).will(ignore()).willThrow(new NullPointerException());
72        given(mock(IMethods.class).objectReturningMethodNoArgs()).will(ignore()).willThrow(new NullPointerException(), new IllegalArgumentException());
73        given(mock(IMethods.class).objectReturningMethodNoArgs()).will(ignore()).willThrow(NullPointerException.class);
74    }
75
76    @Test
77    @SuppressWarnings("unchecked")
78    public void heap_pollution_JDK7plus_warning_avoided_BUT_now_unchecked_generic_array_creation_warnings_ON_JDK5plus_environment() throws Exception {
79        doThrow(NullPointerException.class, IllegalArgumentException.class).when(mock(IMethods.class)).objectReturningMethodNoArgs();
80        when(mock(IMethods.class).objectReturningMethodNoArgs()).thenThrow(NullPointerException.class, IllegalArgumentException.class);
81        doAnswer(ignore()).doThrow(NullPointerException.class, IllegalArgumentException.class).when(mock(IMethods.class)).objectReturningMethodNoArgs();
82
83        willThrow(NullPointerException.class, IllegalArgumentException.class).given(mock(IMethods.class)).objectReturningMethodNoArgs();
84        given(mock(IMethods.class).objectReturningMethodNoArgs()).willThrow(NullPointerException.class, IllegalArgumentException.class);
85        willAnswer(ignore()).willThrow(NullPointerException.class, IllegalArgumentException.class).given(mock(IMethods.class)).objectReturningMethodNoArgs();
86    }
87
88    @Test
89    public void unchecked_confusing_null_argument_warnings() throws Exception {
90        doReturn(null, (Object[]) null).when(mock(IMethods.class)).objectReturningMethodNoArgs();
91        doAnswer(ignore()).doReturn(null, (Object[]) null).when(mock(IMethods.class)).objectReturningMethodNoArgs();
92        when(mock(IMethods.class).objectReturningMethodNoArgs()).thenReturn(null, (Object[]) null);
93        when(mock(IMethods.class).objectReturningMethodNoArgs()).then(ignore()).thenReturn(null, (Object[]) null);
94        willReturn(null, (Object[]) null).given(mock(IMethods.class)).objectReturningMethodNoArgs();
95        given(mock(IMethods.class).objectReturningMethodNoArgs()).willReturn(null, (Object[]) null);
96        willAnswer(ignore()).willReturn(null, (Object[]) null).given(mock(IMethods.class)).objectReturningMethodNoArgs();
97        given(mock(IMethods.class).objectReturningMethodNoArgs()).will(ignore()).willReturn(null, (Object[]) null);
98    }
99
100    private static Answer<?> ignore() {
101        return new Answer<Object>() {
102            @Override
103            public Object answer(InvocationOnMock invocation) throws Throwable {
104                return null;
105            }
106        };
107    }
108}
109