Add unit test, stress test commented

extensions/narayana-jta/runtime/src/test/java/io/quarkus/narayana/jta/runtime/NarayanaJtaRecorderTest.java

@@ -0,0 +1,62 @@
+package io.quarkus.narayana.jta.runtime;
+
+import static org.junit.jupiter.api.Assertions.fail;
+
+import java.nio.charset.StandardCharsets;
+import java.util.SortedSet;
+import java.util.TreeSet;
+import java.util.UUID;
+
+import org.junit.jupiter.api.Test;
+
+public class NarayanaJtaRecorderTest {
+
+    @Test
+    void testByteLength() {
+
+        TransactionManagerConfiguration transactions = new TransactionManagerConfiguration();
+        transactions.shortenNodeNameIfNecessary = true;
+        // create nodeNames larger than 28 bytes
+        for (int i = 1; i < 100; i++) {
+            String originalNodeName = UUID.randomUUID().toString();
+            NarayanaJtaRecorder r = new NarayanaJtaRecorder();
+            transactions.nodeName = originalNodeName;
+            r.setNodeName(transactions);
+            int numberOfBytes = transactions.nodeName.getBytes(StandardCharsets.UTF_8).length;
+            if (numberOfBytes > 28) {
+                fail("node name bytes still exceeded 28 bytes limit, number of bytes is " + numberOfBytes);
+            }
+        }
+        //        for (int i = 1; i < 20000; i++) {
+        for (int i = 1; i < 2000; i++) {
+            byte[] data = new byte[i];
+            NarayanaJtaRecorder r = new NarayanaJtaRecorder();
+            transactions.nodeName = new String(data);
+            r.setNodeName(transactions);
+            int numberOfBytes = transactions.nodeName.getBytes(StandardCharsets.UTF_8).length;
+            if (numberOfBytes > 28) {
+                fail("node name bytes still exceeded 28 bytes limit, number of bytes is " + numberOfBytes);
+            }
+        }
+    }
+
+    //commented because it is a stress test
+    //    @Test
+    void testCollision() {
+        SortedSet<String> set = new TreeSet<>();
+        TransactionManagerConfiguration transactions = new TransactionManagerConfiguration();
+        transactions.shortenNodeNameIfNecessary = true;
+        // create a nodeName larger than 28 bytes
+        for (int i = 1; i < 1000000; i++) {
+            String originalNodeName = UUID.randomUUID().toString();
+            NarayanaJtaRecorder r = new NarayanaJtaRecorder();
+            transactions.nodeName = originalNodeName;
+            r.setNodeName(transactions);
+            if (set.contains(transactions.nodeName)) {
+                fail("Collision of IDs for " + transactions.nodeName);
+            }
+            set.add(transactions.nodeName);
+        }
+    }
+
+}