test(ffe): cover lazy agentless activation

Author: leoromanovsky

products/feature-flagging/feature-flagging-agent/src/test/java/com/datadog/featureflag/FeatureFlaggingSystemTest.java

@@ -2,6 +2,7 @@
 
 import static datadog.trace.api.config.RemoteConfigConfig.REMOTE_CONFIGURATION_ENABLED;
 import static datadog.trace.api.featureflag.config.FeatureFlaggingConfig.FEATURE_FLAGS_CONFIGURATION_SOURCE;
+import static datadog.trace.api.featureflag.config.FeatureFlaggingConfig.FEATURE_FLAGS_CONFIGURATION_SOURCE_AGENTLESS_BASE_URL;
 import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertInstanceOf;
@@ -22,6 +23,7 @@
 import datadog.remoteconfig.ConfigurationPoller;
 import datadog.remoteconfig.Product;
 import datadog.trace.api.Config;
+import datadog.trace.api.featureflag.FeatureFlaggingGateway;
 import datadog.trace.junit.utils.config.WithConfig;
 import okhttp3.HttpUrl;
 import okhttp3.OkHttpClient;
@@ -31,11 +33,16 @@ class FeatureFlaggingSystemTest {
 
   @Test
   @WithConfig(key = FEATURE_FLAGS_CONFIGURATION_SOURCE, value = "agentless")
+  @WithConfig(
+      key = FEATURE_FLAGS_CONFIGURATION_SOURCE_AGENTLESS_BASE_URL,
+      value = "http://127.0.0.1:1")
   void agentlessStartWaitsForApplicationProviderActivation() {
     try {
       FeatureFlaggingSystem.start(sharedCommunicationObjects());
 
       assertTrue(FeatureFlaggingSystem.isAwaitingApplicationActivation());
+      FeatureFlaggingGateway.activate();
+      assertFalse(FeatureFlaggingSystem.isAwaitingApplicationActivation());
     } finally {
       FeatureFlaggingSystem.stop();
     }