From 7d12cd87d7890d3ecd9c7269ae70d460b0f8ea72 Mon Sep 17 00:00:00 2001
From: Marco Saia <marco.saia@datadoghq.com>
Date: Mon, 13 Oct 2025 10:48:00 +0200
Subject: [PATCH] Android: specify locale for string case conversions

---
 .../com/datadog/reactnative/DdSdkConfigurationExt.kt      | 2 +-
 .../src/test/kotlin/com/datadog/reactnative/DdSdkTest.kt  | 8 ++++----
 .../src/test/kotlin/com/datadog/tools/unit/MapExt.kt      | 3 ++-
 3 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/packages/core/android/src/main/kotlin/com/datadog/reactnative/DdSdkConfigurationExt.kt b/packages/core/android/src/main/kotlin/com/datadog/reactnative/DdSdkConfigurationExt.kt
index bcffdbbf5..709e6bcf9 100644
--- a/packages/core/android/src/main/kotlin/com/datadog/reactnative/DdSdkConfigurationExt.kt
+++ b/packages/core/android/src/main/kotlin/com/datadog/reactnative/DdSdkConfigurationExt.kt
@@ -210,7 +210,7 @@ internal fun List<JSONFirstPartyHost>.asFirstPartyHosts(): Map<String, Set<Traci
 
 internal fun List<String>.asTracingHeaderTypes(): Set<TracingHeaderType> {
     return this.mapNotNull {
-        when (it.lowercase()) {
+        when (it.lowercase(Locale.US)) {
             "datadog" -> TracingHeaderType.DATADOG
             "b3" -> TracingHeaderType.B3
             "b3multi" -> TracingHeaderType.B3MULTI
diff --git a/packages/core/android/src/test/kotlin/com/datadog/reactnative/DdSdkTest.kt b/packages/core/android/src/test/kotlin/com/datadog/reactnative/DdSdkTest.kt
index 2d40963b6..5cda53616 100644
--- a/packages/core/android/src/test/kotlin/com/datadog/reactnative/DdSdkTest.kt
+++ b/packages/core/android/src/test/kotlin/com/datadog/reactnative/DdSdkTest.kt
@@ -1309,7 +1309,7 @@ internal class DdSdkTest {
                 mapOf(
                     "match" to match,
                     "propagatorTypes" to headerTypes.map {
-                        it.name.lowercase()
+                        it.name.lowercase(Locale.US)
                     }.toReadableArray()
                 ).toReadableMap()
             )
@@ -1367,7 +1367,7 @@ internal class DdSdkTest {
                 mapOf(
                     "match" to match,
                     "propagatorTypes" to listOf(
-                        TracingHeaderType.DATADOG.name.lowercase(),
+                        TracingHeaderType.DATADOG.name.lowercase(Locale.US),
                         forge.aString()
                     ).toReadableArray()
                 ).toReadableMap()
@@ -1427,7 +1427,7 @@ internal class DdSdkTest {
             mapOf(
                 "match" to host,
                 "propagatorTypes" to listOf(
-                    TracingHeaderType.DATADOG.name.lowercase()
+                    TracingHeaderType.DATADOG.name.lowercase(Locale.US)
                 ).toReadableArray()
             ).toReadableMap()
         )
@@ -1435,7 +1435,7 @@ internal class DdSdkTest {
             mapOf(
                 "match" to host,
                 "propagatorTypes" to listOf(
-                    TracingHeaderType.B3.name.lowercase()
+                    TracingHeaderType.B3.name.lowercase(Locale.US)
                 ).toReadableArray()
             ).toReadableMap()
         )
diff --git a/packages/core/android/src/test/kotlin/com/datadog/tools/unit/MapExt.kt b/packages/core/android/src/test/kotlin/com/datadog/tools/unit/MapExt.kt
index 6c1314821..e12dcc919 100644
--- a/packages/core/android/src/test/kotlin/com/datadog/tools/unit/MapExt.kt
+++ b/packages/core/android/src/test/kotlin/com/datadog/tools/unit/MapExt.kt
@@ -11,6 +11,7 @@ import com.facebook.react.bridge.JavaOnlyArray
 import com.facebook.react.bridge.JavaOnlyMap
 import com.facebook.react.bridge.ReadableArray
 import com.facebook.react.bridge.ReadableMap
+import java.util.Locale
 
 fun Map<*, *>.toReadableMap(): ReadableMap {
     val keysAndValues = mutableListOf<Any?>()
@@ -33,7 +34,7 @@ fun Map<String, Set<TracingHeaderType>>.toFirstPartyHostsReadableArray(): Readab
                 "match" to it.key,
                 "propagatorTypes" to it.value.map {
                         tracingHeaderType ->
-                    tracingHeaderType.toString().lowercase()
+                    tracingHeaderType.toString().lowercase(Locale.US)
                 }.toReadableArray()
             ).toReadableMap()
         )