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package com.vaadin.tests.event;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
import java.lang.reflect.Method;
import org.easymock.EasyMock;
import org.junit.Before;
import org.junit.Test;
import com.vaadin.event.EventRouter;
import com.vaadin.event.MouseEvents.ClickEvent;
import com.vaadin.server.ErrorHandler;
import com.vaadin.shared.Registration;
import com.vaadin.shared.communication.SharedState;
import com.vaadin.ui.Component;
import com.vaadin.ui.Component.Listener;
import com.vaadin.util.ReflectTools;
/**
* Test EventRouter and related error handling.
*/
public class EventRouterTest {
private static final Method COMPONENT_EVENT_METHOD = ReflectTools
.findMethod(Component.Listener.class, "componentEvent",
Component.Event.class);
private EventRouter router;
private Component component;
private ErrorHandler errorHandler;
private Listener listener;
@Before
public void createMocks() {
router = new EventRouter();
component = EasyMock.createNiceMock(Component.class);
errorHandler = EasyMock.createMock(ErrorHandler.class);
listener = EasyMock.createMock(Component.Listener.class);
router.addListener(Component.Event.class, listener,
COMPONENT_EVENT_METHOD);
}
@Test
public void fireEvent_noException_eventReceived() {
listener.componentEvent(EasyMock.anyObject());
EasyMock.replay(component, listener, errorHandler);
router.fireEvent(new Component.Event(component), errorHandler);
EasyMock.verify(listener, errorHandler);
}
@Test
public void fireEvent_exceptionFromListenerAndNoHandler_exceptionPropagated() {
listener.componentEvent(EasyMock.anyObject());
EasyMock.expectLastCall()
.andThrow(new RuntimeException("listener failed"));
EasyMock.replay(component, listener);
try {
router.fireEvent(new Component.Event(component));
fail("Did not receive expected exception from listener");
} catch (RuntimeException e) {
// e is a ListenerMethod@MethodException
assertEquals("listener failed", e.getCause().getMessage());
}
EasyMock.verify(listener);
}
@Test
public void fireEvent_exceptionFromListener_errorHandlerCalled() {
listener.componentEvent(EasyMock.anyObject());
EasyMock.expectLastCall()
.andThrow(new RuntimeException("listener failed"));
errorHandler.error(EasyMock.anyObject());
EasyMock.replay(component, listener, errorHandler);
router.fireEvent(new Component.Event(component), errorHandler);
EasyMock.verify(listener, errorHandler);
}
@Test
public void fireEvent_multipleListenersAndException_errorHandlerCalled() {
Listener listener2 = EasyMock.createMock(Component.Listener.class);
router.addListener(Component.Event.class, listener2,
COMPONENT_EVENT_METHOD);
listener.componentEvent(EasyMock.anyObject());
EasyMock.expectLastCall()
.andThrow(new RuntimeException("listener failed"));
errorHandler.error(EasyMock.anyObject());
// second listener should be called despite an error in the first
listener2.componentEvent(EasyMock.anyObject());
EasyMock.replay(component, listener, listener2, errorHandler);
router.fireEvent(new Component.Event(component), errorHandler);
EasyMock.verify(listener, listener2, errorHandler);
}
@Test
public void registrationToRemoveRegisteredEventListener() {
SharedState state = new SharedState();
Listener listener2 = EasyMock.createMock(Component.Listener.class);
Registration registration = router.addListener(ClickEvent.class,
listener2, COMPONENT_EVENT_METHOD, "click", state);
assertTrue(!state.registeredEventListeners.isEmpty());
registration.remove();
assertNull(state.registeredEventListeners);
}
}
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