use virtual thread as well as scope

Author: codetojoy

egg__12_sc_junit/src/test/java/net/codetojoy/TestLoom.java

@@ -0,0 +1,58 @@
+
+package net.codetojoy;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.concurrent.atomic.AtomicBoolean;
+import jdk.incubator.concurrent.StructuredTaskScope;
+
+// Loom: we want to ensure this compiles, runs
+class CustomStructuredTaskScope<T> extends StructuredTaskScope<T> {}
+
+class Worker {
+    static AtomicBoolean isDone = new AtomicBoolean(false);
+
+    static void doSleep() {
+        System.out.println("TRACER working t: " + Thread.currentThread());
+        try { Thread.sleep(500); } catch (Exception ex) {} 
+        isDone.set(true);
+    }
+
+    static void doWork() {
+        isDone.set(false);
+        try {
+            // Loom: we want to ensure this compiles, runs
+            var thread = Thread.startVirtualThread(Worker::doSleep);
+        } catch(Exception ex) {
+            System.err.println("TRACER caught ex !? msg: " + ex.getMessage());
+        }
+    }
+}
+
+// This isn't really a unit test, but it exercises Loom features to ensure
+// that JUnit is happy and configured properly.
+
+public class TestLoom {
+    @Test
+    void canaryTest() {
+        // test 
+        var x = 4 + 4;
+
+        assertEquals(8, x);
+    }
+
+    @Test
+    void workerTest() {
+        var worker = new Worker();
+
+        // test
+        worker.doWork();
+
+        while (! worker.isDone.get()) {
+            System.out.println("TRACER waiting on worker");
+            try { Thread.sleep(250); } catch (Exception ex) {} 
+        }
+    }
+}