1package junitparams;
2
3import static org.assertj.core.api.Assertions.assertThat;
4
5import java.util.Arrays;
6import java.util.List;
7
8import junitparams.usage.person_example.PersonTest;
9import junitparams.usage.person_example.PersonTest.Person;
10
11import org.junit.Test;
12import org.junit.runner.RunWith;
13
14@SuppressWarnings("unused")
15@RunWith(JUnitParamsRunner.class)
16public class MethodAnnotationArgumentTest {
17
18    @Test
19    @Parameters(method = "return1")
20    public void testSingleMethodName(int number) {
21        assertThat(number).isEqualTo(1);
22    }
23
24    private Integer[] return1() {
25        return new Integer[] { 1 };
26    }
27
28    @Test
29    @Parameters(method = "return1,return2")
30    public void testMultipleMethodNames(int number) {
31        assertThat(number)
32                .isLessThanOrEqualTo(2)
33                .isGreaterThanOrEqualTo(1);
34    }
35
36    @Test
37    @Parameters(method = "return1, return2")
38    public void testMultipleMethodNamesWithWhitespaces(int number) {
39        assertThat(number)
40                .isLessThanOrEqualTo(2)
41                .isGreaterThanOrEqualTo(1);
42    }
43
44    private Integer[] return2() {
45        return new Integer[] { 2 };
46    }
47
48    @Test
49    @Parameters(source = PersonTest.class, method = "adultValues")
50    public void testSingleMethodFromDifferentClass(int age, boolean valid) {
51        assertThat(new Person(age).isAdult()).isEqualTo(valid);
52    }
53
54    @Test
55    @Parameters(method = "stringParamsWithNull")
56    public void shouldPassStringParamsWithNullFromMethod(String parameter) {
57        // given
58        List<String> acceptedParams = Arrays.asList("1", "2", "3", null);
59
60        // then
61        assertThat(acceptedParams).contains(parameter);
62    }
63
64    Object[] stringParamsWithNull() {
65        return genericArray("1", "2", "3", null);
66    }
67
68    @Test
69    @Parameters(method = "multiStringParams")
70    public void shouldPassMultiStringParams(String first, String second) {
71        assertThat(first).isEqualTo(second);
72    }
73
74    Object[] multiStringParams() {
75        return genericArray(
76                genericArray("test", "test"),
77                genericArray("ble", "ble"));
78    }
79
80    private static <T> T[] genericArray(T... elements) {
81        return elements;
82    }
83}
84