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package com.vaadin.tests.components.grid;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Future;
import org.junit.Before;
import org.junit.Test;
import com.vaadin.data.provider.DataProvider;
import com.vaadin.server.VaadinSession;
import com.vaadin.tests.data.bean.Person;
import com.vaadin.tests.util.AlwaysLockedVaadinSession;
import com.vaadin.tests.util.MockUI;
import com.vaadin.ui.Grid;
import com.vaadin.ui.Label;
/**
* Test to validate clean detaching in Grid with ComponentRenderer.
*/
public class GridComponentRendererTest {
private static final Person PERSON = Person.createTestPerson1();
private Grid<Person> grid;
private List<Person> backend;
private DataProvider<Person, ?> dataProvider;
private Label testComponent;
private Label oldComponent;
@Before
public void setUp() {
VaadinSession.setCurrent(new AlwaysLockedVaadinSession(null));
backend = new ArrayList<>();
backend.add(PERSON);
dataProvider = DataProvider.ofCollection(backend);
grid = new Grid<>();
grid.setDataProvider(dataProvider);
grid.addComponentColumn(p -> {
oldComponent = testComponent;
testComponent = new Label();
return testComponent;
});
new MockUI() {
@Override
public Future<Void> access(Runnable runnable) {
runnable.run();
return null;
};
}.setContent(grid);
}
@Test
public void testComponentChangeOnRefresh() {
generateDataForClient(true);
dataProvider.refreshItem(PERSON);
generateDataForClient(false);
assertNotNull("Old component should exist.", oldComponent);
}
@Test
public void testComponentChangeOnSelection() {
generateDataForClient(true);
grid.select(PERSON);
generateDataForClient(false);
assertNotNull("Old component should exist.", oldComponent);
}
@Test
public void testComponentChangeOnDataProviderChange() {
generateDataForClient(true);
grid.setItems(PERSON);
assertEquals("Test component was not detached on DataProvider change.",
null, testComponent.getParent());
}
private void generateDataForClient(boolean initial) {
grid.getDataCommunicator().beforeClientResponse(initial);
if (testComponent != null) {
assertEquals("New component was not attached.", grid,
testComponent.getParent());
}
if (oldComponent != null) {
assertEquals("Old component was not detached.", null,
oldComponent.getParent());
}
}
}
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