Allow null for traceparent generator

embrace-android-sdk/src/integrationTest/kotlin/io/embrace/android/embracesdk/testcases/PublicApiTest.kt

@@ -6,7 +6,9 @@ import android.os.Build.VERSION_CODES.TIRAMISU
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import io.embrace.android.embracesdk.Embrace.AppFramework
 import io.embrace.android.embracesdk.IntegrationTestRule
+import io.embrace.android.embracesdk.fakes.fakeNetworkSpanForwardingBehavior
 import io.embrace.android.embracesdk.internal.IdGeneratorTest.Companion.validPattern
+import io.embrace.android.embracesdk.internal.config.remote.NetworkSpanForwardingRemoteConfig
 import io.embrace.android.embracesdk.recordSession
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertFalse
@@ -28,7 +30,12 @@ internal class PublicApiTest {
     @Rule
     @JvmField
     val testRule: IntegrationTestRule = IntegrationTestRule {
-        IntegrationTestRule.Harness(startImmediately = false)
+        IntegrationTestRule.Harness(startImmediately = false).apply {
+            overriddenConfigService.networkSpanForwardingBehavior =
+                fakeNetworkSpanForwardingBehavior {
+                    NetworkSpanForwardingRemoteConfig(100f)
+                }
+        }
     }
 
     @Test
@@ -92,7 +99,10 @@ internal class PublicApiTest {
         with(testRule) {
             startSdk(context = harness.overriddenCoreModule.context)
             harness.recordSession {
-                assertEquals(embrace.currentSessionId, harness.overriddenOpenTelemetryModule.currentSessionSpan.getSessionId())
+                assertEquals(
+                    embrace.currentSessionId,
+                    harness.overriddenOpenTelemetryModule.currentSessionSpan.getSessionId()
+                )
                 assertNotNull(embrace.currentSessionId)
             }
         }
@@ -115,8 +125,9 @@ internal class PublicApiTest {
     @Test
     fun `ensure all generated W3C traceparent conforms to the expected format`() {
         with(testRule) {
+            startSdk()
             repeat(100) {
-                assertTrue(validPattern.matches(embrace.generateW3cTraceparent()))
+                assertTrue(validPattern.matches(checkNotNull(embrace.generateW3cTraceparent())))
             }
         }
     }

embrace-android-sdk/src/main/java/io/embrace/android/embracesdk/Embrace.java

@@ -273,7 +273,7 @@ public String getTraceIdHeader() {
         return impl.getTraceIdHeader();
     }
 
-    @NonNull
+    @Nullable
     @Override
     public String generateW3cTraceparent() {
         return impl.generateW3cTraceparent();

embrace-android-sdk/src/main/java/io/embrace/android/embracesdk/internal/api/NetworkRequestApi.kt

@@ -19,5 +19,5 @@ public interface NetworkRequestApi {
 
     public val traceIdHeader: String
 
-    public fun generateW3cTraceparent(): String
+    public fun generateW3cTraceparent(): String?
 }

embrace-android-sdk/src/main/java/io/embrace/android/embracesdk/internal/api/delegate/NetworkRequestApiDelegate.kt

@@ -33,7 +33,12 @@ internal class NetworkRequestApiDelegate(
             return NetworkBehaviorImpl.CONFIG_TRACE_ID_HEADER_DEFAULT_VALUE
         }
 
-    override fun generateW3cTraceparent(): String = IdGenerator.generateW3CTraceparent()
+    override fun generateW3cTraceparent(): String? =
+        if (configService?.networkSpanForwardingBehavior?.isNetworkSpanForwardingEnabled() == true) {
+            IdGenerator.generateW3CTraceparent()
+        } else {
+            null
+        }
 
     private fun logNetworkRequest(request: EmbraceNetworkRequest) {
         if (configService?.networkBehavior?.isUrlEnabled(request.url) == true) {

embrace-android-sdk/src/test/java/io/embrace/android/embracesdk/internal/api/delegate/NetworkRequestApiDelegateTest.kt

@@ -8,11 +8,14 @@ import io.embrace.android.embracesdk.fakes.FakeNetworkLoggingService
 import io.embrace.android.embracesdk.fakes.FakeSessionOrchestrator
 import io.embrace.android.embracesdk.fakes.FakeTelemetryService
 import io.embrace.android.embracesdk.fakes.fakeModuleInitBootstrapper
+import io.embrace.android.embracesdk.fakes.fakeNetworkSpanForwardingBehavior
+import io.embrace.android.embracesdk.internal.config.remote.NetworkSpanForwardingRemoteConfig
 import io.embrace.android.embracesdk.internal.payload.AppFramework
 import io.embrace.android.embracesdk.network.EmbraceNetworkRequest
 import io.embrace.android.embracesdk.network.http.HttpMethod
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertNotNull
+import org.junit.Assert.assertNull
 import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith
@@ -60,7 +63,15 @@ internal class NetworkRequestApiDelegateTest {
     }
 
     @Test
-    fun testGenerateW3cTraceparent() {
+    fun testGenerateW3cTraceparentEnabled() {
+        configService.networkSpanForwardingBehavior = fakeNetworkSpanForwardingBehavior {
+            NetworkSpanForwardingRemoteConfig(100f)
+        }
         assertNotNull(delegate.generateW3cTraceparent())
     }
+
+    @Test
+    fun testGenerateW3cTraceparent() {
+        assertNull(delegate.generateW3cTraceparent())
+    }
 }