event-bus/event-bus-core/src/test/java/dev/kske/eventbus/CancelTest.java

53 lines
989 B
Java

package dev.kske.eventbus;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.*;
/**
* Tests the event cancellation mechanism of the event bus.
*
* @author Kai S. K. Engelbart
* @author Leon Hofmeister
* @since 0.1.0
*/
class CancelTest implements EventListener {
EventBus bus;
int hits;
/**
* Constructs an event bus and registers this test instance as an event listener.
*
* @since 0.1.0
*/
@BeforeEach
void registerListener() {
bus = new EventBus();
bus.registerListener(this);
}
/**
* Tests {@link EventBus#cancel()} with two event handlers, of which the first cancels the
* event.
*
* @since 0.1.0
*/
@Test
void testCancellation() {
bus.dispatch(new SimpleEvent());
assertEquals(1, hits);
}
@Event(eventType = SimpleEvent.class, priority = 100)
void onSimpleFirst() {
++hits;
bus.cancel();
}
@Event(eventType = SimpleEvent.class, priority = 50)
void onSimpleSecond() {
++hits;
}
}