/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.isis.core.runtime.services.eventbus;
import java.util.Collections;
import com.google.common.collect.ImmutableMap;
import com.google.common.eventbus.Subscribe;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.nullValue;
import static org.junit.Assert.assertThat;
public class EventBusServiceDefaultTest {
EventBusServiceDefault eventBusService;
@Before
public void setUp() throws Exception {
eventBusService = new EventBusServiceDefault() {
};
}
public static class Init extends EventBusServiceDefaultTest {
@Test
public void emptyMap() throws Exception {
eventBusService.init(Collections.<String, String>emptyMap());
assertThat(eventBusService.getImplementation(), is("guava"));
assertThat(eventBusService.isAllowLateRegistration(), is(false));
}
@Test
public void allowLateRegistration_setToFalse() throws Exception {
eventBusService.init(ImmutableMap.of(EventBusServiceDefault.KEY_ALLOW_LATE_REGISTRATION, "false"));
assertThat(eventBusService.isAllowLateRegistration(), is(false));
}
@Test
public void allowLateRegistration_setToTrue() throws Exception {
eventBusService.init(ImmutableMap.of(EventBusServiceDefault.KEY_ALLOW_LATE_REGISTRATION, "true"));
assertThat(eventBusService.isAllowLateRegistration(), is(true));
}
@Test
public void allowLateRegistration_setToTrueMixedCase() throws Exception {
eventBusService.init(ImmutableMap.of(EventBusServiceDefault.KEY_ALLOW_LATE_REGISTRATION, "TrUe"));
assertThat(eventBusService.isAllowLateRegistration(), is(true));
}
@Test
public void allowLateRegistration_setToEmptyString() throws Exception {
eventBusService.init(ImmutableMap.of(EventBusServiceDefault.KEY_ALLOW_LATE_REGISTRATION, ""));
assertThat(eventBusService.isAllowLateRegistration(), is(false));
}
@Test
public void allowLateRegistration_setToGarbage() throws Exception {
eventBusService.init(ImmutableMap.of(EventBusServiceDefault.KEY_ALLOW_LATE_REGISTRATION, "SDF$%FDVDFG"));
assertThat(eventBusService.isAllowLateRegistration(), is(false));
}
@Test
public void implementation_setToGuava() throws Exception {
eventBusService.init(ImmutableMap.of(EventBusServiceDefault.KEY_EVENT_BUS_IMPLEMENTATION, "guava"));
assertThat(eventBusService.getImplementation(), is("guava"));
}
@Test
public void implementation_setToGuavaMixedCaseRequiringTrimming() throws Exception {
eventBusService.init(ImmutableMap.of(EventBusServiceDefault.KEY_EVENT_BUS_IMPLEMENTATION, " GuAvA "));
assertThat(eventBusService.getImplementation(), is("guava"));
}
@Test
public void implementation_setToAxon() throws Exception {
eventBusService.init(ImmutableMap.of(EventBusServiceDefault.KEY_EVENT_BUS_IMPLEMENTATION, "axon"));
assertThat(eventBusService.getImplementation(), is("axon"));
}
@Test
public void implementation_setToAxonMixedCaseRequiringTrimming() throws Exception {
eventBusService.init(ImmutableMap.of(EventBusServiceDefault.KEY_EVENT_BUS_IMPLEMENTATION, " AxOn "));
assertThat(eventBusService.getImplementation(), is("axon"));
}
@Test
public void implementation_setToEmptyString() throws Exception {
eventBusService.init(ImmutableMap.of(EventBusServiceDefault.KEY_EVENT_BUS_IMPLEMENTATION, ""));
assertThat(eventBusService.getImplementation(), is("guava"));
}
@Test
public void implementation_setToAnythingElse() throws Exception {
eventBusService.init(ImmutableMap.of(EventBusServiceDefault.KEY_EVENT_BUS_IMPLEMENTATION,
"com.mycompany.my.event.bus.Implementation"));
assertThat(eventBusService.getImplementation(), is("com.mycompany.my.event.bus.Implementation"));
}
}
public static class Post extends EventBusServiceDefaultTest {
public static class Subscriber {
Object obj;
@Subscribe
public void on(Object obj) {
this.obj = obj;
}
}
@Rule
public ExpectedException expectedException = ExpectedException.none();
Subscriber subscriber;
@Before
public void setUp() throws Exception {
super.setUp();
subscriber = new Subscriber();
}
@Test
public void allow_late_registration_means_can_register_after_post() throws Exception {
// given
eventBusService.init(ImmutableMap.of(
EventBusServiceDefault.KEY_ALLOW_LATE_REGISTRATION, "true",
EventBusServiceDefault.KEY_EVENT_BUS_IMPLEMENTATION, "guava"));
assertThat(eventBusService.isAllowLateRegistration(), is(true));
assertThat(eventBusService.getImplementation(), is("guava"));
eventBusService.post(new Object());
// when
eventBusService.register(subscriber);
// then
assertThat(subscriber.obj, is(nullValue()));
}
@Test
public void disallow_late_registration_means_cannot_register_after_post() throws Exception {
// given
eventBusService.init(ImmutableMap.of(
EventBusServiceDefault.KEY_ALLOW_LATE_REGISTRATION, "false",
EventBusServiceDefault.KEY_EVENT_BUS_IMPLEMENTATION, "guava"));
assertThat(eventBusService.isAllowLateRegistration(), is(false));
assertThat(eventBusService.getImplementation(), is("guava"));
eventBusService.post(new Object());
// expect
expectedException.expect(IllegalStateException.class);
// when
eventBusService.register(new Subscriber());
}
@Test
public void disallow_late_registration_means_can_register_before_post() throws Exception {
// given
eventBusService.init(ImmutableMap.of(
EventBusServiceDefault.KEY_ALLOW_LATE_REGISTRATION, "false",
EventBusServiceDefault.KEY_EVENT_BUS_IMPLEMENTATION, "guava"));
assertThat(eventBusService.isAllowLateRegistration(), is(false));
assertThat(eventBusService.getImplementation(), is("guava"));
eventBusService.register(subscriber);
// when
final Object event = new Object();
eventBusService.post(event);
// then
assertThat(subscriber.obj, is(event));
}
}
}