[Firebase AI] Add integration tests for global endpoint (#14991)

Author: andrewheard

FirebaseAI/Tests/TestApp/Tests/Integration/GenerateContentIntegrationTests.swift

@@ -49,6 +49,7 @@ struct GenerateContentIntegrationTests {
 
   @Test(arguments: [
     (InstanceConfig.vertexAI_v1beta, ModelNames.gemini2FlashLite),
+    (InstanceConfig.vertexAI_v1beta_global, ModelNames.gemini2FlashLite),
     (InstanceConfig.vertexAI_v1beta_staging, ModelNames.gemini2FlashLite),
     (InstanceConfig.googleAI_v1beta, ModelNames.gemini2FlashLite),
     (InstanceConfig.googleAI_v1beta, ModelNames.gemma3_4B),
@@ -136,9 +137,8 @@ struct GenerateContentIntegrationTests {
   @Test(arguments: [
     (InstanceConfig.vertexAI_v1beta, ModelNames.gemini2_5_FlashPreview, 0),
     (InstanceConfig.vertexAI_v1beta, ModelNames.gemini2_5_FlashPreview, 24576),
-    // TODO: Add Vertex AI Gemini 2.5 Pro tests when available.
-    // (InstanceConfig.vertexAI_v1beta, ModelNames.gemini2_5_ProPreview, 128),
-    // (InstanceConfig.vertexAI_v1beta, ModelNames.gemini2_5_ProPreview, 32768),
+    (InstanceConfig.vertexAI_v1beta_global, ModelNames.gemini2_5_ProPreview, 128),
+    (InstanceConfig.vertexAI_v1beta_global, ModelNames.gemini2_5_ProPreview, 32768),
     (InstanceConfig.googleAI_v1beta, ModelNames.gemini2_5_FlashPreview, 0),
     (InstanceConfig.googleAI_v1beta, ModelNames.gemini2_5_FlashPreview, 24576),
     (InstanceConfig.googleAI_v1beta, ModelNames.gemini2_5_ProPreview, 128),
@@ -250,6 +250,7 @@ struct GenerateContentIntegrationTests {
 
   @Test(arguments: [
     (InstanceConfig.vertexAI_v1beta, ModelNames.gemini2FlashLite),
+    (InstanceConfig.vertexAI_v1beta_global, ModelNames.gemini2FlashLite),
     (InstanceConfig.vertexAI_v1beta_staging, ModelNames.gemini2FlashLite),
     (InstanceConfig.googleAI_v1beta, ModelNames.gemini2FlashLite),
     (InstanceConfig.googleAI_v1beta, ModelNames.gemma3_4B),

FirebaseAI/Tests/TestApp/Tests/Utilities/InstanceConfig.swift

@@ -23,6 +23,10 @@ struct InstanceConfig: Equatable, Encodable {
   static let vertexAI_v1beta = InstanceConfig(
     apiConfig: APIConfig(service: .vertexAI(endpoint: .firebaseProxyProd), version: .v1beta)
   )
+  static let vertexAI_v1beta_global = InstanceConfig(
+    location: "global",
+    apiConfig: APIConfig(service: .vertexAI(endpoint: .firebaseProxyProd), version: .v1beta)
+  )
   static let vertexAI_v1beta_staging = InstanceConfig(
     apiConfig: APIConfig(service: .vertexAI(endpoint: .firebaseProxyStaging), version: .v1beta)
   )
@@ -43,6 +47,7 @@ struct InstanceConfig: Equatable, Encodable {
 
   static let allConfigs = [
     vertexAI_v1beta,
+    vertexAI_v1beta_global,
     vertexAI_v1beta_staging,
     googleAI_v1beta,
     googleAI_v1beta_staging,