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package com.vaadin.data;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.junit.Assert;
import org.junit.Test;
import org.reflections.Reflections;
import com.vaadin.data.provider.DataProvider;
import com.vaadin.data.provider.ListDataProvider;
import com.vaadin.ui.Tree;
import com.vaadin.ui.TreeGrid;
public class HasItemsTest {
private static ArrayList<Class<?>> whiteList = new ArrayList<>();
{
// these create a hierarchical data provider, which is not using
// ArrayList or Arrays.ArrayList in the end
whiteList.add(TreeGrid.class);
whiteList.add(Tree.class);
}
@Test
public void setItemsVarargsConstructor_createsListDataProvider_itIsEditable()
throws InstantiationException, IllegalAccessException {
Set<Class<? extends HasItems>> subTypesOf = new Reflections(
"com.vaadin.ui").getSubTypesOf(HasItems.class).stream().filter(
clazz -> !Modifier.isAbstract(clazz.getModifiers()))
.filter(clazz -> Stream.of(clazz.getConstructors())
.anyMatch(constuctor -> constuctor
.getParameterCount() == 0))
.filter(clazz -> !whiteList.contains(clazz))
.collect(Collectors.toSet());
for (Class<? extends HasItems> hasItemsType : subTypesOf) {
HasItems hasItems = hasItemsType.newInstance();
hasItems.setItems("0", "1");
DataProvider dataProvider = hasItems.getDataProvider();
Assert.assertTrue(hasItemsType.getSimpleName()
+ " setItems method with varargs parameters of does not create a list data provider",
dataProvider instanceof ListDataProvider);
ListDataProvider listDataProvider = (ListDataProvider) dataProvider;
Assert.assertTrue(hasItemsType.getSimpleName()
+ " does not have setItems method with varargs parameters of does not create an ArrayList backed list data provider",
listDataProvider.getItems() instanceof ArrayList);
List list = (List) listDataProvider.getItems();
// previously the following would explode since Arrays.ArrayList
// does not support it
list.add(0, "2");
}
}
}
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