# Diferences

## JUnit 5 = JUnit Platform + JUnit Jupiter + JUnit Vintage
- **JUnit Platform** serves as a foundation for launching testing frameworks on the JVM.
- **JUnit Jupiter** is the combination of the new programming model and extension model for writing tests and extensions in JUnit 5.
- **JUnit Vintage** provides a TestEngine for running JUnit 3 and JUnit 4 based tests on the platform.

## Annotations
JUnit 5 comes with important changes within its annotations. The most important one is that we can no longer use `@Test` annotation for specifying expectations.

### `expected` attribute can be replaced with `assertThrows`

```java
@Test(expected = Exception.class)
public void shouldRaiseAnException() throws Exception {
    // ...
}
```

becomes,

```java
public void shouldRaiseAnException() throws Exception {
    Assertions.assertThrows(Exception.class, () -> {
        //...
    });
}
```

### `timeout` attribute can be replaced with `assertTimeout`

```java
@Test(timeout = 1)
public void shouldFailBecauseTimeout() throws InterruptedException {
    Thread.sleep(10);
}
```

becomes

```java
@Test
public void shouldFailBecauseTimeout() throws InterruptedException {
    Assertions.assertTimeout(Duration.ofMillis(1), () -> Thread.sleep(10));
}
```


## import location
| JUnit4 | JUnit5 |
|---|---|
| `org.junit.Test` | `org.junit.jupiter.api.Test` |
| `org.junit.Before` | `org.junit.jupiter.api.BeforeEach` |
| `org.junit.After` | `org.junit.jupiter.api.AfterEach` |
| `org.junit.BeforeClass` | `org.junit.jupiter.api.BeforeAll` |
| `org.junit.AfterClass` | `org.junit.jupiter.api.AfterAll` |
| `org.junit.Ignore` | `org.junit.jupiter.api.Disabled` |