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package com.vaadin.data.provider;
import static org.junit.Assert.assertTrue;
import java.util.Collections;
import java.util.Comparator;
import java.util.LinkedList;
import java.util.List;
import java.util.stream.Collectors;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import com.vaadin.server.SerializablePredicate;
public abstract class DataProviderTestBase<D extends DataProvider<StrBean, SerializablePredicate<StrBean>>> {
protected static class CountingListener implements DataProviderListener {
private int counter = 0;
@Override
public void onDataChange(DataChangeEvent event) {
++counter;
}
public int getCounter() {
return counter;
}
}
protected final SerializablePredicate<StrBean> fooFilter = s -> s.getValue()
.equals("Foo");
protected final SerializablePredicate<StrBean> gt5Filter = s -> s
.getRandomNumber() > 5;
protected D dataProvider;
protected List<StrBean> data = StrBean.generateRandomBeans(100);
@Before
public void setUp() {
dataProvider = createDataProvider();
}
protected abstract D createDataProvider();
protected final D getDataProvider() {
return dataProvider;
}
protected abstract void setSortOrder(List<SortOrder<String>> sortOrder,
Comparator<StrBean> comp);
private Query<StrBean, SerializablePredicate<StrBean>> createQuery(
List<SortOrder<String>> sortOrder, Comparator<StrBean> comp) {
return createQuery(sortOrder, comp, null);
}
private Query<StrBean, SerializablePredicate<StrBean>> createQuery(
List<SortOrder<String>> sortOrder, Comparator<StrBean> comp,
SerializablePredicate<StrBean> filter) {
return new Query<>(0, Integer.MAX_VALUE, sortOrder, comp, filter);
}
private Query<StrBean, SerializablePredicate<StrBean>> createQuery(
SerializablePredicate<StrBean> filter) {
return createQuery(Collections.emptyList(), null, filter);
}
// Tests start here.
@Test
public void testListContainsAllData() {
List<StrBean> list = new LinkedList<>(data);
dataProvider.fetch(new Query<>())
.forEach(str -> assertTrue(
"Data provider contained values not in original data",
list.remove(str)));
assertTrue("Not all values from original data were in data provider",
list.isEmpty());
}
@Test
public void testSortByComparatorListsDiffer() {
Comparator<StrBean> comp = Comparator.comparing(StrBean::getValue)
.thenComparing(StrBean::getRandomNumber)
.thenComparing(StrBean::getId);
List<StrBean> list = dataProvider
.fetch(createQuery(Sort.asc("value").thenAsc("randomNumber")
.thenAsc("id").build(), comp))
.collect(Collectors.toList());
// First value in data is { Xyz, 10, 100 } which should be last in list
Assert.assertNotEquals("First value should not match", data.get(0),
list.get(0));
Assert.assertEquals("Sorted data and original data sizes don't match",
data.size(), list.size());
data.sort(comp);
for (int i = 0; i < data.size(); ++i) {
Assert.assertEquals("Sorting result differed", data.get(i),
list.get(i));
}
}
@Test
public void testDefaultSortWithSpecifiedPostSort() {
Comparator<StrBean> comp = Comparator.comparing(StrBean::getValue)
.thenComparing(Comparator.comparing(StrBean::getId).reversed());
setSortOrder(Sort.asc("value").thenDesc("id").build(), comp);
List<StrBean> list = dataProvider
.fetch(createQuery(Sort.asc("randomNumber").build(),
Comparator.comparing(StrBean::getRandomNumber)))
.collect(Collectors.toList());
Assert.assertEquals("Sorted data and original data sizes don't match",
data.size(), list.size());
for (int i = 1; i < list.size(); ++i) {
StrBean prev = list.get(i - 1);
StrBean cur = list.get(i);
// Test specific sort
Assert.assertTrue(
"Failure: " + prev.getRandomNumber() + " > "
+ cur.getRandomNumber(),
prev.getRandomNumber() <= cur.getRandomNumber());
if (prev.getRandomNumber() == cur.getRandomNumber()) {
// Test default sort
Assert.assertTrue(
prev.getValue().compareTo(cur.getValue()) <= 0);
if (prev.getValue().equals(cur.getValue())) {
Assert.assertTrue(prev.getId() > cur.getId());
}
}
}
}
@Test
public void testDefaultSortWithFunction() {
setSortOrder(Sort.asc("value").build(),
Comparator.comparing(StrBean::getValue));
List<StrBean> list = dataProvider.fetch(new Query<>())
.collect(Collectors.toList());
Assert.assertEquals("Sorted data and original data sizes don't match",
data.size(), list.size());
for (int i = 1; i < list.size(); ++i) {
StrBean prev = list.get(i - 1);
StrBean cur = list.get(i);
// Test default sort
Assert.assertTrue(prev.getValue().compareTo(cur.getValue()) <= 0);
}
}
@Test
public void filteringListDataProvider_convertFilter() {
DataProvider<StrBean, String> strFilterDataProvider = dataProvider
.withConvertedFilter(
text -> strBean -> strBean.getValue().contains(text));
Assert.assertEquals("Only one item should match 'Xyz'", 1,
strFilterDataProvider.size(new Query<>("Xyz")));
Assert.assertEquals("No item should match 'Zyx'", 0,
strFilterDataProvider.size(new Query<>("Zyx")));
Assert.assertEquals("Unexpected number of matches for 'Foo'", 36,
strFilterDataProvider.size(new Query<>("Foo")));
Assert.assertEquals("No items should've been filtered out", data.size(),
strFilterDataProvider.size(new Query<>()));
}
@Test
public void filteringListDataProvider_defaultFilterType() {
Assert.assertEquals("Only one item should match 'Xyz'", 1,
dataProvider.size(new Query<>(
strBean -> strBean.getValue().contains("Xyz"))));
Assert.assertEquals("No item should match 'Zyx'", 0, dataProvider.size(
new Query<>(strBean -> strBean.getValue().contains("Zyx"))));
Assert.assertEquals("Unexpected number of matches for 'Foo'", 36,
dataProvider.size(new Query<>(fooFilter)));
}
protected long sizeWithUnfilteredQuery() {
return dataProvider.fetch(new Query<>()).count();
}
protected static <F> void assertSizeWithFilter(int expectedSize,
DataProvider<?, F> dataProvider, F filterValue) {
Assert.assertEquals(expectedSize,
dataProvider.size(new Query<>(filterValue)));
}
}
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