@Test
public void collectionToObjectInteraction() throws Exception {
List<List<String>> list = new ArrayList<List<String>>();
list.add(Arrays.asList("9", "12"));
list.add(Arrays.asList("37", "23"));
conversionService.addConverter(new CollectionToObjectConverter(conversionService));
assertTrue(conversionService.canConvert(List.class, List.class));
assertSame(list, conversionService.convert(list, List.class));
}
@Test
public void emptyListToList() throws Exception {
conversionService.addConverter(new CollectionToCollectionConverter(conversionService));
conversionService.addConverterFactory(new StringToNumberConverterFactory());
List<String> list = new ArrayList<String>();
TypeDescriptor sourceType = TypeDescriptor.forObject(list);
TypeDescriptor targetType = new TypeDescriptor(getClass().getField("emptyListTarget"));
assertTrue(conversionService.canConvert(sourceType, targetType));
assertEquals(list, conversionService.convert(list, sourceType, targetType));
}
@Test
@SuppressWarnings("unchecked")
public void arrayCollectionToObjectInteraction() throws Exception {
List<String>[] array = new List[2];
array[0] = Arrays.asList("9", "12");
array[1] = Arrays.asList("37", "23");
conversionService.addConverter(new ArrayToCollectionConverter(conversionService));
conversionService.addConverter(new CollectionToObjectConverter(conversionService));
assertTrue(conversionService.canConvert(String[].class, List.class));
assertEquals(Arrays.asList(array), conversionService.convert(array, List.class));
}
@Test
public void emptyListToListDifferentTargetType() throws Exception {
conversionService.addConverter(new CollectionToCollectionConverter(conversionService));
conversionService.addConverterFactory(new StringToNumberConverterFactory());
List<String> list = new ArrayList<String>();
TypeDescriptor sourceType = TypeDescriptor.forObject(list);
TypeDescriptor targetType = new TypeDescriptor(getClass().getField("emptyListDifferentTarget"));
assertTrue(conversionService.canConvert(sourceType, targetType));
@SuppressWarnings("unchecked")
LinkedList<Integer> result =
(LinkedList<Integer>) conversionService.convert(list, sourceType, targetType);
assertEquals(LinkedList.class, result.getClass());
assertTrue(result.isEmpty());
}
@Test
public void listToCollectionNoCopyRequired() throws NoSuchFieldException {
List<?> input = new ArrayList<String>(Arrays.asList("foo", "bar"));
assertSame(
input,
conversionService.convert(
input,
TypeDescriptor.forObject(input),
new TypeDescriptor(getClass().getField("wildCardCollection"))));
}
@Test
@SuppressWarnings("unchecked")
public void objectToCollection() throws Exception {
List<List<String>> list = new ArrayList<List<String>>();
list.add(Arrays.asList("9", "12"));
list.add(Arrays.asList("37", "23"));
conversionService.addConverterFactory(new StringToNumberConverterFactory());
conversionService.addConverter(new ObjectToCollectionConverter(conversionService));
conversionService.addConverter(new CollectionToObjectConverter(conversionService));
TypeDescriptor sourceType = TypeDescriptor.forObject(list);
TypeDescriptor targetType = new TypeDescriptor(getClass().getField("objectToCollection"));
assertTrue(conversionService.canConvert(sourceType, targetType));
List<List<List<Integer>>> result =
(List<List<List<Integer>>>) conversionService.convert(list, sourceType, targetType);
assertEquals((Integer) 9, result.get(0).get(0).get(0));
assertEquals((Integer) 12, result.get(0).get(1).get(0));
assertEquals((Integer) 37, result.get(1).get(0).get(0));
assertEquals((Integer) 23, result.get(1).get(1).get(0));
}
@Test(expected = ConversionFailedException.class)
public void nothingInCommon() throws Exception {
List<Object> resources = new ArrayList<Object>();
resources.add(new ClassPathResource("test"));
resources.add(3);
TypeDescriptor sourceType = TypeDescriptor.forObject(resources);
assertEquals(
resources,
conversionService.convert(
resources, sourceType, new TypeDescriptor(getClass().getField("resources"))));
}
@Test(expected = ConverterNotFoundException.class)
public void elementTypesNotConvertible() throws Exception {
List<String> resources = new ArrayList<String>();
resources.add(null);
resources.add(null);
TypeDescriptor sourceType = new TypeDescriptor(getClass().getField("strings"));
assertEquals(
resources,
conversionService.convert(
resources, sourceType, new TypeDescriptor(getClass().getField("resources"))));
}
@Test
public void allNulls() throws Exception {
List<Resource> resources = new ArrayList<Resource>();
resources.add(null);
resources.add(null);
TypeDescriptor sourceType = TypeDescriptor.forObject(resources);
assertSame(
resources,
conversionService.convert(
resources, sourceType, new TypeDescriptor(getClass().getField("resources"))));
}
@Test
public void scalarList() throws Exception {
List<String> list = new ArrayList<String>();
list.add("9");
list.add("37");
TypeDescriptor sourceType = TypeDescriptor.forObject(list);
TypeDescriptor targetType = new TypeDescriptor(getClass().getField("scalarListTarget"));
assertTrue(conversionService.canConvert(sourceType, targetType));
try {
conversionService.convert(list, sourceType, targetType);
} catch (ConversionFailedException ex) {
assertTrue(ex.getCause() instanceof ConverterNotFoundException);
}
conversionService.addConverterFactory(new StringToNumberConverterFactory());
assertTrue(conversionService.canConvert(sourceType, targetType));
@SuppressWarnings("unchecked")
List<String> result = (List<String>) conversionService.convert(list, sourceType, targetType);
assertFalse(list.equals(result));
assertEquals(9, result.get(0));
assertEquals(37, result.get(1));
}
@Test
public void differentImpls() throws Exception {
List<Resource> resources = new ArrayList<Resource>();
resources.add(new ClassPathResource("test"));
resources.add(new FileSystemResource("test"));
resources.add(new TestResource());
TypeDescriptor sourceType = TypeDescriptor.forObject(resources);
assertSame(
resources,
conversionService.convert(
resources, sourceType, new TypeDescriptor(getClass().getField("resources"))));
}
@Before
public void setUp() {
conversionService.addConverter(new CollectionToCollectionConverter(conversionService));
}
