BAEL-8447: Handling Empty String With Cucumber Data Table (#19099)

Author: achraftt

testing-modules/testing-libraries/src/test/java/com/baeldung/cucumber/books/BookStoreRegistryConfigurer.java

@@ -21,22 +21,30 @@ public void configureTypeRegistry(TypeRegistry typeRegistry) {
           new DataTableType(BookCatalog.class, new BookTableTransformer())
         );
     }
-    
+
     private static class BookTableTransformer implements TableTransformer<BookCatalog> {
 
         @Override
         public BookCatalog transform(DataTable table) throws Throwable {
-
             BookCatalog catalog = new BookCatalog();
-            
+
             table.cells()
               .stream()
               .skip(1)        // Skip header row
-              .map(fields -> new Book(fields.get(0), fields.get(1)))
+              .map(fields -> {
+                  String title = fields.get(0);
+                  String author = fields.get(1);
+
+                  // Handle empty strings
+                  if (author != null && author.isEmpty()) {
+                      author = "Unknown Author"; // Apply default value
+                  }
+
+                  return new Book(title, author);
+              })
               .forEach(catalog::addBook);
-            
+
             return catalog;
         }
-        
     }
-}
+}

testing-modules/testing-libraries/src/test/java/com/baeldung/cucumber/books/BookStoreRunSteps.java

@@ -56,6 +56,11 @@ public void searchForBooksByAuthor(String author) {
         foundBooks = store.booksByAuthor(author);
     }
 
+    @When("^I search for books by unknown authors$")
+    public void searchForBooksByUnknownAuthors() {
+        foundBooks = store.booksByAuthor("Unknown Author");
+    }
+
     @Then("^I find (\\d+) books$")
     public void findBooks(int count) {
         assertEquals(count, foundBooks.size());

testing-modules/testing-libraries/src/test/resources/features/book-store.feature

@@ -24,4 +24,15 @@ Feature: Book Store
       | The Lion, the Witch and the Wardrobe | C.S. Lewis  |
       | In the Garden of Beasts              | Erik Larson |
     When I search for books by author Erik Larson
+    Then I find 2 books
+
+  Scenario: Finding books with some missing author data
+    Given I have the following books in the store with transformer
+      | title                                | author       |
+      | The Devil in the White City          | Erik Larson  |
+      | The Lion, the Witch and the Wardrobe | C.S. Lewis   |
+      | In the Garden of Beasts              | Erik Larson  |
+      | Untitled Manuscript                   |              |  # Empty author cell
+      | Anonymous Work                        |              |  # Empty author cell
+    When I search for books by unknown authors
     Then I find 2 books