Re-check FIRAAppCheckDebugToken

Author: andrewheard

FirebaseVertexAI/Tests/TestApp/Tests/Integration/IntegrationTests.swift

@@ -64,6 +64,18 @@ final class IntegrationTests: XCTestCase {
     storage = Storage.storage()
   }
 
+  func testDebugTokenProvided() {
+    if ProcessInfo.processInfo.environment["FIRAAppCheckDebugToken"] == nil {
+      XCTFail("No App Check debug token provided in FIRAAppCheckDebugToken.")
+    }
+  }
+
+  func testDebugTokenNotProvided() {
+    if ProcessInfo.processInfo.environment["FIRAAppCheckDebugToken"] != nil {
+      XCTFail("Token not provided; intentionally failing for testing.")
+    }
+  }
+
   // MARK: - Generate Content
 
   func testGenerateContent() async throws {