What, why and how?
Why?
Why
- The "Future"
- Clear APIs for integration with tools, e.g. IDEs
- JUnit 4 was a reflection hack fest!
- Extensibility
- New features
What?
JUnit 5 = JUnit Platform + JUnit Jupiter + JUnit Vintage
And what was JUnit 4?
https://github.com/sormuras/junit5-there-is-no-junit5
No decoupling possible :(
https://github.com/sormuras/junit5-there-is-no-junit5
And JUnit 5?
https://github.com/sormuras/junit5-there-is-no-junit5
JUnit 5 Architecture
https://github.com/sormuras/junit5-there-is-no-junit5
Features Spotlight
- @DisplayName
- @Nested
- @ParameterizedTest
- @ValueSource
- @EnumSource
- @CsvSource
- @MethodSource
- @ArgumentSource
- JUnit Pioneer
Getting Started (Maven)
<dependencies>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>${junit.jupiter.version}</version>
<scope>test</scope>
</dependency>
</dependencies>Getting Started (First Test)
import static org.junit.jupiter.api.Assertions.assertEquals;
import example.util.Calculator;
import org.junit.jupiter.api.Test;
class MyFirstJUnitJupiterTests {
private final Calculator calculator = new Calculator();
@Test
void addition() {
assertEquals(2, calculator.add(1, 1));
}
}