Update javaxval/src/test/java/org/baeldung/javaxval/messageinterpolator/ParameterMessageInterpolaterIntegrationTest.java

update to use the givenX_whenY_thenZ naming convention for tests

Co-Authored-By: KevinGilmore <kpg102@gmail.com>

libraries-testing/src/main/java/com/baeldung/awaitility/AsyncService.java

@@ -0,0 +1,52 @@
+package com.baeldung.awaitility;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
+import java.util.concurrent.atomic.AtomicLong;
+
+public class AsyncService {
+    private final int DELAY = 1000;
+    private final int INIT_DELAY = 2000;
+
+    private final AtomicLong value = new AtomicLong(0);
+    private final Executor executor = Executors.newFixedThreadPool(4);
+    private volatile boolean initialized = false;
+
+    void initialize() {
+        executor.execute(() -> {
+            sleep(INIT_DELAY);
+            initialized = true;
+        });
+    }
+
+    boolean isInitialized() {
+        return initialized;
+    }
+
+    void addValue(long val) {
+        throwIfNotInitialized();
+        executor.execute(() -> {
+            sleep(DELAY);
+            value.addAndGet(val);
+        });
+    }
+
+    public long getValue() {
+        throwIfNotInitialized();
+        return value.longValue();
+    }
+
+    private void sleep(int delay) {
+        try {
+            Thread.sleep(delay);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private void throwIfNotInitialized() {
+        if (!initialized) {
+            throw new IllegalStateException("Service is not initialized");
+        }
+    }
+}