Parameterized JUnit Tests

JUnitParams provides a runner - JUnitParamsRunner, to add parameterized tests in a test class. With this runner parameterized and non-parameterized test methods can be combined in the same class.

view plainprint?

1. @RunWith(JUnitParamsRunner.class)  
2. public class ParameterizedTests {  
3.     @Parameters({"1, true", "2, false"})  
4.     @Test  
5.     public void test1(int num, boolean result) {  
6.         assertThat(num == 1, is(result));  
7.     }  
8. }  

@RunWith(JUnitParamsRunner.class)
public class ParameterizedTests {
    @Parameters({"1, true", "2, false"})
    @Test
    public void test1(int num, boolean result) {
        assertThat(num == 1, is(result));
    }
}

To pass in objects or null values, a separate method can be setup, which then can be added to the @Parameters annotation.

view plainprint?

1. @RunWith(JUnitParamsRunner.class)  
2. public class ParameterizedTests {  
3.     private Object[] params() {  
4.         return $(  
5.                 $(1, true),  
6.                 $(2, false)  
7.         );  
8.     }  
9.   
10.     @Parameters(method = "params")  
11.     @Test  
12.     public void test1(int num, boolean result) {  
13.         assertThat(num == 1, is(result));  
14.     }  
15. }  

@RunWith(JUnitParamsRunner.class)
public class ParameterizedTests {
    private Object[] params() {
        return $(
                $(1, true),
                $(2, false)
        );
    }

    @Parameters(method = "params")
    @Test
    public void test1(int num, boolean result) {
        assertThat(num == 1, is(result));
    }
}