fix(openfeature): handle null details in DevCycleProvider.track()

src/main/java/com/devcycle/sdk/server/openfeature/DevCycleProvider.java

@@ -16,6 +16,7 @@
 import dev.openfeature.sdk.FeatureProvider;
 import dev.openfeature.sdk.ImmutableMetadata;
 import dev.openfeature.sdk.ImmutableMetadata.ImmutableMetadataBuilder;
+import dev.openfeature.sdk.ImmutableTrackingEventDetails;
 import dev.openfeature.sdk.Metadata;
 import dev.openfeature.sdk.ProviderEvaluation;
 import dev.openfeature.sdk.Reason;
@@ -214,6 +215,11 @@ public void track(String eventName, EvaluationContext context, TrackingEventDeta
             throw new ProviderNotReadyError("DevCycle client not initialized");
         }
 
+        // OpenFeature passes null details when Client.track() is called without them
+        if (details == null) {
+            details = new ImmutableTrackingEventDetails();
+        }
+
         DevCycleUser user = DevCycleUser.fromEvaluationContext(context);
         try {
             BigDecimal eventValue = extractEventValue(details);

src/test/java/com/devcycle/sdk/server/openfeature/DevCycleProviderTest.java

@@ -2,6 +2,7 @@
 
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
 import java.util.ArrayList;
@@ -13,14 +14,17 @@
 import org.junit.Assert;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
 import org.mockito.junit.MockitoJUnitRunner;
 
 import com.devcycle.sdk.server.common.api.IDevCycleClient;
+import com.devcycle.sdk.server.common.model.DevCycleEvent;
 import com.devcycle.sdk.server.common.model.EvalReason;
 import com.devcycle.sdk.server.common.model.Variable;
 
 import dev.openfeature.sdk.ErrorCode;
 import dev.openfeature.sdk.ImmutableContext;
+import dev.openfeature.sdk.OpenFeatureAPI;
 import dev.openfeature.sdk.ProviderEvaluation;
 import dev.openfeature.sdk.Reason;
 import dev.openfeature.sdk.Structure;
@@ -32,6 +36,22 @@
 @RunWith(MockitoJUnitRunner.class)
 public class DevCycleProviderTest {
 
+    @Test
+    public void testTrackWithoutDetails() throws Exception {
+        IDevCycleClient dvcClient = mock(IDevCycleClient.class);
+        when(dvcClient.isInitialized()).thenReturn(true);
+
+        String domain = "track-without-details";
+        OpenFeatureAPI.getInstance().setProviderAndWait(domain, new DevCycleProvider(dvcClient));
+        OpenFeatureAPI.getInstance().getClient(domain).track("checkout-completed", new ImmutableContext("user-1234"));
+
+        ArgumentCaptor<DevCycleEvent> event = ArgumentCaptor.forClass(DevCycleEvent.class);
+        verify(dvcClient).track(any(), event.capture());
+        Assert.assertEquals("checkout-completed", event.getValue().getType());
+        Assert.assertNull(event.getValue().getValue());
+        Assert.assertEquals(new HashMap<>(), event.getValue().getMetaData());
+    }
+
     @Test
     public void testResolveClientNotInitialized() {
         IDevCycleClient dvcClient = mock(IDevCycleClient.class);