1 files changed, 33 insertions, 0 deletions
diff --git a/server/src/test/java/com/vaadin/data/BinderTest.java b/server/src/test/java/com/vaadin/data/BinderTest.java
index 3e27cc5f9b..401cc07017 100644
--- a/server/src/test/java/com/vaadin/data/BinderTest.java
+++ b/server/src/test/java/com/vaadin/data/BinderTest.java
@@ -270,6 +270,39 @@ public class BinderTest extends BinderTestBase<Binder<Person>, Person> {
     }
 
     @Test
+    public void save_bound_beanAsDraft() {
+        Binder<Person> binder = new Binder<>();
+        binder.forField(nameField)
+            .withValidator((value,context) -> {
+                if (value.equals("Mike")) return ValidationResult.ok();
+                else return ValidationResult.error("value must be Mike");
+            })
+            .bind(Person::getFirstName, Person::setFirstName);
+        binder.forField(ageField)
+                .withConverter(new StringToIntegerConverter(""))
+                .bind(Person::getAge, Person::setAge);
+
+        Person person = new Person();
+
+        String fieldValue = "John";
+        nameField.setValue(fieldValue);
+
+        int age = 10;
+        ageField.setValue("10");
+
+        person.setFirstName("Mark");
+
+        binder.writeBeanAsDraft(person);
+
+        // name is not written to draft as validation / conversion
+        // does not pass
+        assertNotEquals(fieldValue, person.getFirstName());
+        // age is written to draft even if firstname validation
+        // fails
+        assertEquals(age, person.getAge());
+    }
+
+    @Test
     public void load_bound_fieldValueIsUpdated() {
         binder.bind(nameField, Person::getFirstName, Person::setFirstName);