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package com.vaadin.data;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertSame;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import com.vaadin.tests.data.bean.Person;
public class BinderTest extends BinderTestBase<Binder<Person>, Person> {
@Before
public void setUp() {
binder = new Binder<>();
item = new Person();
item.setFirstName("Johannes");
item.setAge(32);
}
@Test(expected = NullPointerException.class)
public void bindNullBean_throws() {
binder.bind(null);
}
@Test(expected = NullPointerException.class)
public void bindNullField_throws() {
binder.forField(null);
}
@Test(expected = NullPointerException.class)
public void bindNullGetter_throws() {
binder.bind(nameField, null, Person::setFirstName);
}
@Test
public void fieldBound_bindItem_fieldValueUpdated() {
binder.forField(nameField).bind(Person::getFirstName,
Person::setFirstName);
binder.bind(item);
assertEquals("Johannes", nameField.getValue());
}
@Test
public void fieldBoundWithShortcut_bindBean_fieldValueUpdated() {
bindName();
assertEquals("Johannes", nameField.getValue());
}
@Test
public void beanBound_updateFieldValue_beanValueUpdated() {
binder.bind(item);
binder.bind(nameField, Person::getFirstName, Person::setFirstName);
assertEquals("Johannes", nameField.getValue());
nameField.setValue("Artur");
assertEquals("Artur", item.getFirstName());
}
@Test
public void bound_getBean_returnsBoundBean() {
assertFalse(binder.getBean().isPresent());
binder.bind(item);
assertSame(item, binder.getBean().get());
}
@Test
public void unbound_getBean_returnsNothing() {
binder.bind(item);
binder.unbind();
assertFalse(binder.getBean().isPresent());
}
@Test
public void bound_changeFieldValue_beanValueUpdated() {
bindName();
nameField.setValue("Henri");
assertEquals("Henri", item.getFirstName());
}
@Test
public void unbound_changeFieldValue_beanValueNotUpdated() {
bindName();
nameField.setValue("Henri");
binder.unbind();
nameField.setValue("Aleksi");
assertEquals("Henri", item.getFirstName());
}
@Test
public void bindNullSetter_valueChangesIgnored() {
binder.bind(nameField, Person::getFirstName, null);
binder.bind(item);
nameField.setValue("Artur");
assertEquals(item.getFirstName(), "Johannes");
}
@Test
public void bound_bindToAnotherBean_stopsUpdatingOriginal() {
bindName();
nameField.setValue("Leif");
Person p2 = new Person();
p2.setFirstName("Marlon");
binder.bind(p2);
assertEquals("Marlon", nameField.getValue());
assertEquals("Leif", item.getFirstName());
assertSame(p2, binder.getBean().get());
nameField.setValue("Ilia");
assertEquals("Ilia", p2.getFirstName());
assertEquals("Leif", item.getFirstName());
}
@Test
public void save_unbound_noChanges() throws ValidationException {
Binder<Person> binder = new Binder<>();
Person person = new Person();
int age = 10;
person.setAge(age);
binder.save(person);
Assert.assertEquals(age, person.getAge());
}
@Test
public void save_bound_beanIsUpdated() throws ValidationException {
Binder<Person> binder = new Binder<>();
binder.bind(nameField, Person::getFirstName, Person::setFirstName);
Person person = new Person();
String fieldValue = "bar";
nameField.setValue(fieldValue);
person.setFirstName("foo");
binder.save(person);
Assert.assertEquals(fieldValue, person.getFirstName());
}
@Test
public void load_bound_fieldValueIsUpdated() {
binder.bind(nameField, Person::getFirstName, Person::setFirstName);
Person person = new Person();
String name = "bar";
person.setFirstName(name);
binder.load(person);
Assert.assertEquals(name, nameField.getValue());
}
@Test
public void load_unbound_noChanges() {
nameField.setValue("");
Person person = new Person();
String name = "bar";
person.setFirstName(name);
binder.load(person);
Assert.assertEquals("", nameField.getValue());
}
protected void bindName() {
binder.bind(nameField, Person::getFirstName, Person::setFirstName);
binder.bind(item);
}
}
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