Extract MockEventListener

Fixes: gh-5014

config/src/test/java/org/springframework/security/config/MockEventListener.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2002-2018 the original author or authors.
+ *
+ * Licensed 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.springframework.security.config;
+
+import org.springframework.context.ApplicationEvent;
+import org.springframework.context.ApplicationListener;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * @author Rob Winch
+ * @since 5.0
+ */
+public class MockEventListener<T extends ApplicationEvent>
+	implements ApplicationListener<T> {
+	private List<T> events = new ArrayList<>();
+
+	public void onApplicationEvent(T event) {
+		this.events.add(event);
+	}
+
+	public List<T> getEvents() {
+		return this.events;
+	}
+}

config/src/test/java/org/springframework/security/config/annotation/authentication/configuration/AuthenticationConfigurationPublishTests.java

@@ -19,7 +19,6 @@ package org.springframework.security.config.annotation.authentication.configurat
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.context.ApplicationListener;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Import;
 import org.springframework.security.authentication.AuthenticationEventPublisher;
@@ -27,12 +26,10 @@ import org.springframework.security.authentication.AuthenticationManager;
 import org.springframework.security.authentication.DefaultAuthenticationEventPublisher;
 import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
 import org.springframework.security.authentication.event.AuthenticationSuccessEvent;
+import org.springframework.security.config.MockEventListener;
 import org.springframework.security.config.users.AuthenticationTestConfiguration;
 import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
 
-import java.util.ArrayList;
-import java.util.List;
-
 import static org.assertj.core.api.Assertions.*;
 
 /**
@@ -41,7 +38,7 @@ import static org.assertj.core.api.Assertions.*;
 @RunWith(SpringJUnit4ClassRunner.class)
 public class AuthenticationConfigurationPublishTests {
 	@Autowired
-	MockEventListener listener;
+	MockEventListener<AuthenticationSuccessEvent> listener;
 
 	AuthenticationManager authenticationManager;
 
@@ -50,7 +47,7 @@ public class AuthenticationConfigurationPublishTests {
 	public void authenticationEventPublisherBeanUsedByDefault() {
 		this.authenticationManager.authenticate(new UsernamePasswordAuthenticationToken("user", "password"));
 
-		assertThat(this.listener.events).hasSize(1);
+		assertThat(this.listener.getEvents()).hasSize(1);
 	}
 
 	@Autowired
@@ -67,18 +64,9 @@ public class AuthenticationConfigurationPublishTests {
 		}
 
 		@Bean
-		MockEventListener eventListener() {
-			return new MockEventListener();
+		MockEventListener<AuthenticationSuccessEvent> eventListener() {
+			return new MockEventListener<AuthenticationSuccessEvent>(){};
 		}
 	}
 
-	static class MockEventListener implements
-		ApplicationListener<AuthenticationSuccessEvent> {
-		List<AuthenticationSuccessEvent> events = new ArrayList<>();
-
-		public void onApplicationEvent(AuthenticationSuccessEvent event) {
-			this.events.add(event);
-		}
-
-	}
 }