BAEL-1524: Chain of Responsibility Design Pattern in Java (#3573)

* BAEL-1422: measure performance of Random and ThreadLocalRandom using JMH

* BAEL-1422: updated benchmarking examples of Random and ThreadLocalRandom to use newWorkStealingPool that leverages ForkJoinPool

* BAEL-1422: refactored benchmarking examples for comparing performance of ThreadLocalRandom and Random
- initialised the collection of Callable before running benchmarking
- removed for loop for submitting task and instead used executor.invokeAll(collection_of_callable)

* BAEL-1282: added TDD type junit tests for geospatial queries elasticsearch

* BAEL-1524: added example for chain of responsibility design pattern

* BAEL-1524: added BDD style jUnit test to test unknown handler in ChainOfResponsibility design pattern

* BAEL-1524: refactored ChainOfResponsibility design pattern example

* BAEL-1524: refactored ChainOfResponsibility design pattern example

* BAEL-1524: updated ChainOfResponsibility design pattern example

* BAEL-1524: updated ChainOfResponsibility design pattern example

core-java/src/test/java/com/baeldung/designpatterns/chainofresponsibility/ChainOfResponsibilityTest.java

@@ -0,0 +1,37 @@
+package com.baeldung.designpatterns.chainofresponsibility;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertTrue;
+
+public class ChainOfResponsibilityTest {
+
+    private static AuthenticationProcessor getChainOfAuthProcessor() {
+
+        AuthenticationProcessor oAuthProcessor = new OAuthAuthenticationProcessor(null);
+        AuthenticationProcessor unamePasswordProcessor = new UsernamePasswordAuthenticationProcessor(oAuthProcessor);
+        return unamePasswordProcessor;
+    }
+
+    @Test
+    public void givenOAuthProvider_whenCheckingAuthorized_thenSuccess() {
+        AuthenticationProcessor authProcessorChain = getChainOfAuthProcessor();
+        boolean isAuthorized = authProcessorChain.isAuthorized(new OAuthTokenProvider());
+        assertTrue(isAuthorized);
+    }
+
+    @Test
+    public void givenUsernamePasswordProvider_whenCheckingAuthorized_thenSuccess() {
+        AuthenticationProcessor authProcessorChain = getChainOfAuthProcessor();
+        boolean isAuthorized = authProcessorChain.isAuthorized(new UsernamePasswordProvider());
+        assertTrue(isAuthorized);
+    }
+
+    @Test
+    public void givenSamlAuthProvider_whenCheckingAuthorized_thenFailure() {
+        AuthenticationProcessor authProcessorChain = getChainOfAuthProcessor();
+        boolean isAuthorized = authProcessorChain.isAuthorized(new SamlAuthenticationProvider());
+        assertTrue(!isAuthorized);
+    }
+
+}