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SimpleListIteratorTest.java
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SimpleListIteratorTest.java
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package cz.cvut.kbss.ontodriver.jena.list;
import cz.cvut.kbss.ontodriver.exception.IntegrityConstraintViolatedException;
import cz.cvut.kbss.ontodriver.jena.connector.StorageConnector;
import cz.cvut.kbss.ontodriver.jena.environment.Generator;
import cz.cvut.kbss.ontodriver.jena.exception.ListProcessingException;
import cz.cvut.kbss.ontodriver.model.Assertion;
import cz.cvut.kbss.ontodriver.model.Axiom;
import cz.cvut.kbss.ontodriver.model.NamedResource;
import org.apache.jena.rdf.model.Property;
import org.apache.jena.rdf.model.Resource;
import org.apache.jena.rdf.model.ResourceFactory;
import org.apache.jena.rdf.model.Statement;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import java.net.URI;
import java.util.*;
import static org.apache.jena.rdf.model.ResourceFactory.*;
import static org.hamcrest.CoreMatchers.containsString;
import static org.junit.Assert.*;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
public class SimpleListIteratorTest {
private static final Resource RESOURCE = createResource(Generator.generateUri().toString());
private static final Property HAS_LIST = ResourceFactory.createProperty(Generator.generateUri().toString());
private static final Property HAS_NEXT = ResourceFactory.createProperty(Generator.generateUri().toString());
@Rule
public ExpectedException thrown = ExpectedException.none();
@Mock
private StorageConnector connectorMock;
@Before
public void setUp() {
MockitoAnnotations.initMocks(this);
}
@Test
public void hasNextReturnsTrueForListHead() {
generateList();
final SimpleListIterator iterator = new SimpleListIterator(RESOURCE, HAS_LIST, HAS_NEXT, null, connectorMock);
assertTrue(iterator.hasNext());
}
private List<URI> generateList() {
return ListTestUtil.generateSimpleList(RESOURCE, HAS_LIST, HAS_NEXT, connectorMock);
}
@Test
public void nextReturnsFirstListElement() {
final List<URI> list = generateList();
final SimpleListIterator iterator = new SimpleListIterator(RESOURCE, HAS_LIST, HAS_NEXT, null, connectorMock);
assertTrue(iterator.hasNext());
final Axiom<NamedResource> head = iterator.next();
assertNotNull(head);
assertEquals(NamedResource.create(RESOURCE.getURI()), head.getSubject());
assertEquals(Assertion.createObjectPropertyAssertion(URI.create(HAS_LIST.getURI()), false),
head.getAssertion());
assertEquals(NamedResource.create(list.get(0)), head.getValue().getValue());
}
@Test
public void nextThrowsNoSuchElementWhenNoMoreElementsExist() {
final SimpleListIterator iterator = new SimpleListIterator(RESOURCE, HAS_LIST, HAS_NEXT, null, connectorMock);
assertFalse(iterator.hasNext());
thrown.expect(NoSuchElementException.class);
iterator.next();
}
@Test
public void nextAllowsToReadWholeList() {
final List<URI> list = generateList();
final SimpleListIterator iterator = new SimpleListIterator(RESOURCE, HAS_LIST, HAS_NEXT, null, connectorMock);
final List<URI> actual = new ArrayList<>();
while (iterator.hasNext()) {
final Axiom<NamedResource> axiom = iterator.next();
if (!axiom.getSubject().getIdentifier().equals(URI.create(RESOURCE.getURI()))) {
assertEquals(URI.create(HAS_NEXT.getURI()), axiom.getAssertion().getIdentifier());
}
actual.add(axiom.getValue().getValue().getIdentifier());
}
assertEquals(list, actual);
}
@Test
public void nextThrowsIntegrityConstraintViolationWhenMultipleNextNodesAreFound() {
generateList();
when(connectorMock.find(RESOURCE, HAS_LIST, null)).thenReturn(
Arrays.asList(createStatement(RESOURCE, HAS_LIST, createResource()),
createStatement(RESOURCE, HAS_LIST, createResource())));
final SimpleListIterator iterator = new SimpleListIterator(RESOURCE, HAS_LIST, HAS_NEXT, null, connectorMock);
thrown.expect(IntegrityConstraintViolatedException.class);
thrown.expectMessage("Encountered multiple successors of list node " + RESOURCE.getURI());
iterator.next();
}
@Test
public void nextThrowsListProcessingExceptionWhenNodeIsLiteral() {
final List<URI> list = generateList();
final String nodeUri = list.get(list.size() - 1).toString();
when(connectorMock.find(createResource(nodeUri), HAS_NEXT, null)).thenReturn(
Collections.singletonList(createStatement(createResource(nodeUri), HAS_NEXT, createTypedLiteral(117))));
final SimpleListIterator iterator = new SimpleListIterator(RESOURCE, HAS_LIST, HAS_NEXT, null, connectorMock);
thrown.expect(ListProcessingException.class);
thrown.expectMessage("Expected successor of node " + nodeUri + " to be a named resource.");
while (iterator.hasNext()) {
iterator.next();
}
}
@Test
public void removeWithoutReconnectRemovesLastElementInList() {
final List<URI> list = generateList();
final SimpleListIterator iterator = new SimpleListIterator(RESOURCE, HAS_LIST, HAS_NEXT, null, connectorMock);
while (iterator.hasNext()) {
iterator.next();
}
iterator.removeWithoutReconnect();
verify(connectorMock).remove(createResource(list.get(list.size() - 2).toString()), HAS_NEXT,
createResource(list.get(list.size() - 1).toString()));
}
@Test
public void removeWithoutReconnectRemovesFirstElementInList() {
final List<URI> list = generateList();
final SimpleListIterator iterator = new SimpleListIterator(RESOURCE, HAS_LIST, HAS_NEXT, null, connectorMock);
iterator.nextValue();
iterator.removeWithoutReconnect();
verify(connectorMock).remove(RESOURCE, HAS_LIST, createResource(list.get(0).toString()));
}
@Test
public void removeWithoutReconnectThrowsIllegalStateExceptionWhenNextWasNotCalledBefore() {
thrown.expect(IllegalStateException.class);
thrown.expectMessage(containsString("Cannot call remove before calling next."));
generateList();
final SimpleListIterator iterator = new SimpleListIterator(RESOURCE, HAS_LIST, HAS_NEXT, null, connectorMock);
iterator.removeWithoutReconnect();
}
@Test
public void removeWithoutReconnectThrowsIllegalStateExceptionWhenRemoveIsCalledTwiceOnElement() {
thrown.expect(IllegalStateException.class);
thrown.expectMessage(containsString("Cannot call remove multiple times on one element."));
generateList();
final SimpleListIterator iterator = new SimpleListIterator(RESOURCE, HAS_LIST, HAS_NEXT, null, connectorMock);
iterator.nextValue();
iterator.removeWithoutReconnect();
iterator.removeWithoutReconnect();
}
@Test
public void replaceConnectsNodeToListEnd() {
final List<URI> list = generateList();
final SimpleListIterator iterator = new SimpleListIterator(RESOURCE, HAS_LIST, HAS_NEXT, null, connectorMock);
while (iterator.hasNext()) {
iterator.nextValue();
}
final Resource newOne = createResource(Generator.generateUri().toString());
iterator.replace(newOne);
verify(connectorMock).remove(createResource(list.get(list.size() - 2).toString()), HAS_NEXT,
createResource(list.get(list.size() - 1).toString()));
final Statement expectedAdded = createStatement(createResource(list.get(list.size() - 2).toString()), HAS_NEXT,
newOne);
verify(connectorMock).add(Collections.singletonList(expectedAdded));
}
@Test
public void replaceReplacesNodeInsideList() {
final List<URI> list = generateList();
final SimpleListIterator iterator = new SimpleListIterator(RESOURCE, HAS_LIST, HAS_NEXT, null, connectorMock);
int index = Generator.randomInt(list.size() - 1);
if (index == 0) {
index = index + 1;
}
int i = 0;
while (iterator.hasNext() && i <= index) {
iterator.nextValue();
i++;
}
final Resource newOne = createResource(Generator.generateUri().toString());
iterator.replace(newOne);
verify(connectorMock).remove(createResource(list.get(index - 1).toString()), HAS_NEXT,
createResource(list.get(index).toString()));
verify(connectorMock).remove(createResource(list.get(index).toString()), HAS_NEXT,
createResource(list.get(index + 1).toString()));
final Statement expectedAddedPrevLink = createStatement(createResource(list.get(index - 1).toString()),
HAS_NEXT,
newOne);
final Statement expectedAddedNextLink = createStatement(newOne, HAS_NEXT,
createResource(list.get(index + 1).toString()));
verify(connectorMock).add(Arrays.asList(expectedAddedPrevLink, expectedAddedNextLink));
}
@Test
public void replaceReplacesFirstNodeInList() {
final List<URI> list = generateList();
final SimpleListIterator iterator = new SimpleListIterator(RESOURCE, HAS_LIST, HAS_NEXT, null, connectorMock);
iterator.nextValue();
final Resource newOne = createResource(Generator.generateUri().toString());
iterator.replace(newOne);
verify(connectorMock).remove(RESOURCE, HAS_LIST, createResource(list.get(0).toString()));
verify(connectorMock)
.remove(createResource(list.get(0).toString()), HAS_NEXT, createResource(list.get(1).toString()));
final Statement expectedAddedPrevLink = createStatement(RESOURCE, HAS_LIST, newOne);
final Statement expectedAddedNextLink = createStatement(newOne, HAS_NEXT,
createResource(list.get(1).toString()));
verify(connectorMock).add(Arrays.asList(expectedAddedPrevLink, expectedAddedNextLink));
}
@Test
public void replaceDoesNotConnectNextNodeToItselfWhenListItemIsBeingRemoved() {
final List<URI> list = generateList();
final SimpleListIterator iterator = new SimpleListIterator(RESOURCE, HAS_LIST, HAS_NEXT, null, connectorMock);
iterator.nextValue();
iterator.nextValue();
final Resource newOne = createResource(list.get(2).toString());
iterator.replace(newOne);
verify(connectorMock)
.remove(createResource(list.get(0).toString()), HAS_NEXT, createResource(list.get(1).toString()));
verify(connectorMock)
.remove(createResource(list.get(1).toString()), HAS_NEXT, createResource(list.get(2).toString()));
final Statement expectedAddedPrevLink = createStatement(createResource(list.get(0).toString()), HAS_NEXT,
newOne);
verify(connectorMock).add(Collections.singletonList(expectedAddedPrevLink));
}
}