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Writing Our First Test Methods
A test method is a method that fulfills these three requirements:
- A test method isn't
privateorstatic - A test method must not return anything. In other words, its return type must be
void. - A test method must be annotated with the
@Testannotation.
Let's add two test methods to our test class:
The firstTest() method
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and
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secondTest() method
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have a custom display name and
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they write a unique string to System.out.
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After we have written these two test methods, the source code of our test class looks as follows:
| Code Block |
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import org.junit.jupiter.api.*;
@DisplayName("JUnit 5 Example")
class JUnit5ExampleTest {
@BeforeAll
static void beforeAll() {
System.out.println("Before all test methods");
}
@BeforeEach
void beforeEach() {
System.out.println("Before each test method");
}
@AfterEach
void afterEach() {
System.out.println("After each test method");
}
@AfterAll
static void afterAll() {
System.out.println("After all test methods");
}
// Added test methods
@Test
@DisplayName("First test")
void firstTest() {
System.out.println("First test method");
}
@Test
@DisplayName("Second test")
void secondTest() {
System.out.println("Second test method");
}
} |
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