Add simplest hello world examples

hystrix/src/test/java/com/baeldung/hystrix/CommandHelloWorld.java

@@ -0,0 +1,19 @@
+package com.baeldung.hystrix;
+
+import com.netflix.hystrix.HystrixCommand;
+import com.netflix.hystrix.HystrixCommandGroupKey;
+
+class CommandHelloWorld extends HystrixCommand<String> {
+
+    private final String name;
+
+    CommandHelloWorld(String name) {
+        super(HystrixCommandGroupKey.Factory.asKey("ExampleGroup"));
+        this.name = name;
+    }
+
+    @Override
+    protected String run() {
+        return "Hello " + name + "!";
+    }
+}

hystrix/src/test/java/com/baeldung/hystrix/HystrixTimeoutTest.java

@@ -1,6 +1,7 @@
 package com.baeldung.hystrix;
 
 import com.netflix.hystrix.*;
+import com.netflix.hystrix.collapser.RequestCollapserFactory;
 import com.netflix.hystrix.exception.HystrixRuntimeException;
 import org.junit.After;
 import org.junit.Before;
@@ -23,8 +24,13 @@ public class HystrixTimeoutTest {
     @Before
     public void setup() {
         config = HystrixCommand
-                .Setter
+          .Setter
-                .withGroupKey(HystrixCommandGroupKey.Factory.asKey("RemoteServiceGroup1"));
+          .withGroupKey(HystrixCommandGroupKey.Factory.asKey("RemoteServiceGroup1"));
+    }
+
+    @Test
+    public void givenInputBob_andDefaultSettings_thenReturnHelloBob(){
+        assertThat(new CommandHelloWorld("Bob").execute(), equalTo("Hello Bob!"));
     }
 
     @Test
@@ -36,7 +42,6 @@ public class HystrixTimeoutTest {
     public void givenTimeoutEqualTo10000_andDefaultSettings_thenExpectHystrixRuntimeException() throws InterruptedException {
         exception.expect(HystrixRuntimeException.class);
         new RemoteServiceTestCommand(config, new RemoteServiceTestSimulator(10_000)).execute();
-
     }
 
     @Test
@@ -54,5 +59,4 @@ public class HystrixTimeoutTest {
         new RemoteServiceTestCommand(config, new RemoteServiceTestSimulator(15_000)).execute();
     }
 
-
 }