src/test/java/junitparams/usage/person_example/PersonTest.java

package junitparams.usage.person_example;

import static org.assertj.core.api.Assertions.assertThat;

import junitparams.naming.TestCaseName;
import org.junit.*;
import org.junit.runner.*;

import junitparams.*;

@RunWith(JUnitParamsRunner.class)
public class PersonTest {

    @Test
    @Parameters({
            "17, false",
            "22, true" })
    public void isAdultAgeDirect(int age, boolean valid) throws Exception {
        assertThat(new Person(age).isAdult()).isEqualTo(valid);
    }

    @Test
    @Parameters(method = "adultValues")
    public void isAdultAgeDefinedMethod(int age, boolean valid) throws Exception {
        assertThat(new Person(age).isAdult()).isEqualTo(valid);
    }

    private Object[] adultValues() {
        return new Object[]{new Object[]{17, false}, new Object[]{22, true}};
    }

    @Test
    @Parameters
    public void isAdultAgeDefaultMethod(int age, boolean valid) throws Exception {
        assertThat(new Person(age).isAdult()).isEqualTo(valid);
    }

    @SuppressWarnings("unused")
    private Object[] parametersForIsAdultAgeDefaultMethod() {
        return adultValues();
    }

    @Test
    @Parameters(source = PersonProvider.class)
    public void personIsAdult(Person person, boolean valid) {
        assertThat(person.isAdult()).isEqualTo(valid);
    }

    public static class PersonProvider {
        public static Object[] provideAdults() {
            return new Object[]{new Object[]{new Person(25), true}, new Object[]{new Person(32), true}};
        }

        public static Object[] provideTeens() {
            return new Object[]{new Object[]{new Person(12), false}, new Object[]{new Person(17), false}};
        }
    }

    // Android-changed: CTS and AndroidJUnitRunner rely on specific format to test names, changing
    // them will prevent CTS and AndroidJUnitRunner from working properly; see b/36541809
    @Ignore
    @Test
    @Parameters(method = "adultValues")
    @TestCaseName("Is person with age {0} adult? It's {1} statement.")
    public void isAdultWithCustomTestName(int age, boolean valid) throws Exception {
        assertThat(new Person(age).isAdult()).isEqualTo(valid);
    }

    public static class Person {

        private String name;
        private int age;

        public Person(Integer age) {
            this.age = age;
        }

        public Person(String name, Integer age) {
            this.name = name;
            this.age = age;
        }

        public String getName() {
            return name;
        }

        public boolean isAdult() {
            return age >= 18;
        }

        public int getAge() {
            return age;
        }

        @Override
        public String toString() {
            return "Person of age: " + age;
        }
    }
}