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package com.vaadin.v7.tests.data.converter;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.EnumSet;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Set;
import java.util.Vector;
import org.junit.Test;
import com.vaadin.v7.data.util.converter.StringToCollectionConverter;
import com.vaadin.v7.data.util.converter.StringToCollectionConverter.CollectionFactory;
import com.vaadin.v7.data.util.converter.StringToEnumConverter;
import com.vaadin.v7.data.util.converter.StringToIntegerConverter;
/**
* Tests for {@link StringToCollectionConverter}.
*
* @author Vaadin Ltd
*/
public class StringToCollectionConverterTest {
@Test
public void convertToModel_defaultCtor() {
StringToCollectionConverter converter = new StringToCollectionConverter();
Collection<?> model = converter.convertToModel("a, b, c", List.class,
null);
assertTrue("Unexpected model class", model instanceof ArrayList);
Iterator<?> iterator = model.iterator();
assertEquals("Incorrect fist token", "a", iterator.next());
assertEquals("Incorrect second token", "b", iterator.next());
assertEquals("Incorrect third token", "c", iterator.next());
}
@Test
public void convertToModel_customDelimiter() {
StringToCollectionConverter converter = new StringToCollectionConverter(
"x");
Collection<?> model = converter.convertToModel("axbxc", List.class,
null);
assertTrue("Unexpected model class", model instanceof ArrayList);
Iterator<?> iterator = model.iterator();
assertEquals("Incorrect fist token", "a", iterator.next());
assertEquals("Incorrect second token", "b", iterator.next());
assertEquals("Incorrect third token", "c", iterator.next());
}
@Test
public void convertToModel_customConverter() {
StringToCollectionConverter converter = new StringToCollectionConverter(
",", new StringToIntegerConverter(), Integer.class);
Collection<?> model = converter.convertToModel("6,2,5", List.class,
null);
assertTrue("Unexpected model class", model instanceof ArrayList);
Iterator<?> iterator = model.iterator();
assertEquals("Incorrect fist token", 6, iterator.next());
assertEquals("Incorrect second token", 2, iterator.next());
assertEquals("Incorrect third token", 5, iterator.next());
}
@Test
public void convertToModel_setAsCollection() {
StringToCollectionConverter converter = new StringToCollectionConverter(
" ", new StringToEnumConverter(), TestEnum.class);
Collection<?> model = converter.convertToModel("Z X Y", Set.class,
null);
assertTrue("Unexpected model class", model instanceof HashSet);
EnumSet<TestEnum> set = EnumSet.allOf(TestEnum.class);
set.removeAll(model);
assertTrue("Some values are not in resutling collection",
set.isEmpty());
}
@Test
public void convertToModel_customFactory() {
CollectionFactory factory = new CollectionFactory() {
@Override
public Collection<?> createCollection(
Class<? extends Collection> type) {
return new Vector();
}
};
StringToCollectionConverter converter = new StringToCollectionConverter(
", ", null, String.class, factory);
Collection<?> model = converter.convertToModel("a, b, c",
Collection.class, null);
assertTrue("Unexpected model class", model instanceof Vector);
Iterator<?> iterator = model.iterator();
assertEquals("Incorrect fist token", "a", iterator.next());
assertEquals("Incorrect second token", "b", iterator.next());
assertEquals("Incorrect third token", "c", iterator.next());
}
@Test
public void convertToPresentation_default() {
StringToCollectionConverter converter = new StringToCollectionConverter();
String presentation = converter.convertToPresentation(
Arrays.asList("a", "b", "c"), String.class, null);
assertEquals("a, b, c", presentation);
}
@Test
public void convertToPresentation_customDelimiter() {
StringToCollectionConverter converter = new StringToCollectionConverter(
"x");
String presentation = converter.convertToPresentation(
Arrays.asList("a", "b", "c"), String.class, null);
assertEquals("axbxc", presentation);
}
@Test
public void convertToPresentation_customConverter() {
StringToCollectionConverter converter = new StringToCollectionConverter(
",", new StringToEnumConverter(), TestEnum.class);
String presentation = converter.convertToPresentation(
Arrays.asList(TestEnum.Z, TestEnum.Y), String.class, null);
assertEquals("Z,Y", presentation);
}
@Test
public void convertToModel_singleItem() {
StringToCollectionConverter converter = new StringToCollectionConverter();
Collection<?> model = converter.convertToModel("a", List.class, null);
Iterator<?> iterator = model.iterator();
assertEquals("Incorrect fist token", "a", iterator.next());
assertFalse("More than one item detected after conversation",
iterator.hasNext());
}
@Test
public void convertToModel_null() {
StringToCollectionConverter converter = new StringToCollectionConverter();
assertNull(converter.convertToModel(null, ArrayList.class,
Locale.ENGLISH));
}
@Test
public void convertToPresentation_null() {
StringToCollectionConverter converter = new StringToCollectionConverter();
assertNull(converter.convertToPresentation(null, String.class,
Locale.ENGLISH));
}
public enum TestEnum {
X, Y, Z;
}
}
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