Validate the Gradle wrapper with gradle/actions/wrapper-validation@v6, fix a log batch test race

.github/workflows/validate_gradle.yml

@@ -16,4 +16,4 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v7
-      - uses: gradle/wrapper-validation-action@v3
+      - uses: gradle/actions/wrapper-validation@v6

sdk-java/src/main/java/ly/count/sdk/java/internal/DefaultNetworking.java

@@ -19,7 +19,8 @@ public class DefaultNetworking implements Networking {
     private Log L = null;
 
     private Transport transport;
-    private Tasks tasks;
+    //package-private so tests can wait until a sent request was handled
+    Tasks tasks;
     private volatile boolean shutdown;
     private volatile boolean backedOff;
 

sdk-java/src/test/java/ly/count/sdk/java/internal/SdkLogGatheringTests.java

@@ -896,6 +896,8 @@ private static void awaitSentBatches() throws Exception {
         for (int round = 0; round < 200; round++) {
             awaitLogDelivery();
             Assert.assertTrue("a queued batch never reached the server", TestUtils.waitFor(30_000, () -> storedBatchCount() == 0));
+            //the networking removes a sent batch before it lets the logger queue the next one
+            awaitNetworking();
             awaitLogDelivery();
             if (storedBatchCount() == 0) {
                 return;
@@ -904,6 +906,17 @@ private static void awaitSentBatches() throws Exception {
         Assert.fail("the logger kept queueing batches");
     }
 
+    /**
+     * Waits until the networking finished the task it was running, the handling of a sent request
+     * included.
+     */
+    private static void awaitNetworking() {
+        SDKCore core = SDKCore.instance;
+        if (core != null && core.networking instanceof DefaultNetworking) {
+            ((DefaultNetworking) core.networking).tasks.await();
+        }
+    }
+
     /**
      * The log batches stored on disk, read straight from the request files, which works once the
      * SDK stopped too.