Fix for FunctionToolCallbackTests

 - Add more deterministic test data for assertion

Author: ilayaperumalg

spring-ai-integration-tests/src/test/java/org/springframework/ai/integration/tests/tool/FunctionToolCallbackTests.java

@@ -158,7 +158,7 @@ void chatListFromBean() {
 		var content = ChatClient.builder(this.openAiChatModel)
 			.build()
 			.prompt()
-			.user("What authors wrote the books %s and %s available in the library?".formatted("The Hobbit", "Narnia"))
+			.user("What authors wrote the books %s and %s available in the library?".formatted("The Hobbit", "The Lion, the Witch and the Wardrobe"))
 			.tools(Tools.AUTHORS_BY_BOOKS)
 			.call()
 			.content();
@@ -174,7 +174,7 @@ void chatListFromCallback() {
 		var content = ChatClient.builder(this.openAiChatModel)
 			.build()
 			.prompt()
-			.user("What authors wrote the books %s and %s available in the library?".formatted("The Hobbit", "Narnia"))
+			.user("What authors wrote the books %s and %s available in the library?".formatted("The Hobbit", "The Lion, the Witch and the Wardrobe"))
 			.tools(FunctionToolCallback.builder("authorsByAvailableBooks", function)
 				.description("Get the list of authors who wrote the given books available in the library")
 				.inputType(Books.class)

spring-ai-integration-tests/src/test/java/org/springframework/ai/integration/tests/tool/domain/BookService.java

@@ -28,7 +28,7 @@ public class BookService {
 	private static final ConcurrentHashMap<Integer, Book> books = new ConcurrentHashMap<>(Map
 		.of( // @formatter:off
 		1, new Book("His Dark Materials", "Philip Pullman"),
-		2, new Book("Narnia", "C.S. Lewis"),
+		2, new Book("The Lion, the Witch and the Wardrobe", "C.S. Lewis"),
 		3, new Book("The Hobbit", "J.R.R. Tolkien"),
 		4, new Book("The Lord of The Rings", "J.R.R. Tolkien"),
 		5, new Book("The Silmarillion", "J.R.R. Tolkien"))); // @formatter:on