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FileStorageTest.java
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FileStorageTest.java
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/**
* Copyright (C) 2022 Czech Technical University in Prague
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details. You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cz.cvut.kbss.ontodriver.jena.connector;
import org.apache.jena.query.Dataset;
import org.apache.jena.query.ReadWrite;
import org.apache.jena.rdf.model.Model;
import org.apache.jena.rdf.model.ModelFactory;
import org.apache.jena.rdf.model.Resource;
import org.apache.jena.riot.Lang;
import org.apache.jena.riot.RDFDataMgr;
import org.apache.jena.vocabulary.RDF;
import org.junit.jupiter.api.Test;
import java.io.*;
import java.nio.file.Files;
import java.util.List;
import static org.apache.jena.rdf.model.ResourceFactory.createResource;
import static org.apache.jena.rdf.model.ResourceFactory.createStatement;
import static org.hamcrest.CoreMatchers.containsString;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.junit.jupiter.api.Assertions.*;
public class FileStorageTest extends StorageTestUtil {
@Test
public void initializesStorageByReadingFileWithSingleGraph() throws Exception {
final File file = Files.createTempFile("jena-onto", ".ttl").toFile();
file.deleteOnExit();
final Model model = generateModel();
try (final BufferedWriter writer = new BufferedWriter(new FileWriter(file))) {
model.write(writer, "TURTLE");
}
final LocalStorage result = new FileStorage(createConfiguration(file.getAbsolutePath()));
final Dataset dataset = result.getDataset();
assertNotNull(dataset);
assertFalse(dataset.getDefaultModel().isEmpty());
}
private Model generateModel() {
final Model model = ModelFactory.createDefaultModel();
final Resource resource = model.createResource("test:example");
resource.addProperty(RDF.type, model.createResource("test:type"));
return model;
}
@Test
public void initializesStorageFromNonexistentFileByCreatingIt() {
final String filePath = System.getProperty("java.io.tmpdir") + File.separator + "jena-test.ttl";
final LocalStorage result = new FileStorage(createConfiguration(filePath));
final Dataset dataset = result.getDataset();
assertNotNull(dataset);
final File f = new File(filePath);
assertTrue(f.exists());
f.deleteOnExit();
}
@Test
public void writeChangesOutputsChangesIntoTargetFile() throws Exception {
final File file = Files.createTempFile("jena-onto", ".ttl").toFile();
file.deleteOnExit();
final LocalStorage storage = new FileStorage(createConfiguration(file.getAbsolutePath()));
final Dataset dataset = storage.getDataset();
final Model m = dataset.getDefaultModel();
dataset.begin(ReadWrite.WRITE);
final String rName = "test:example";
final String rValue = "test:type";
final Resource resource = m.createResource(rName);
resource.addProperty(RDF.type, m.createResource(rValue));
dataset.commit();
storage.writeChanges();
final List<String> lines = Files.readAllLines(file.toPath());
assertFalse(lines.isEmpty());
final String str = String.join("\n", lines);
assertThat(str, containsString(rName));
assertThat(str, containsString(rValue));
}
@Test
public void reloadReloadsDatasetFromFile() throws Exception {
final File file = Files.createTempFile("jena-onto", ".ttl").toFile();
file.deleteOnExit();
final LocalStorage storage = new FileStorage(createConfiguration(file.getAbsolutePath()));
final Resource subj = createResource(SUBJECT);
final Resource obj = createResource(TYPE_TWO);
assertFalse(storage.getDefaultGraph().contains(subj, RDF.type, obj));
final Model m = RDFDataMgr.loadModel(file.getAbsolutePath());
m.add(createStatement(subj, RDF.type, obj));
try (final BufferedOutputStream out = new BufferedOutputStream(new FileOutputStream(file))) {
RDFDataMgr.write(out, m, Lang.TTL);
}
m.close();
storage.reload();
assertTrue(storage.getDefaultGraph().contains(subj, RDF.type, obj));
}
@Test
public void reloadThrowsIllegalStateWhenStorageIsInTransaction() throws Exception {
final File file = Files.createTempFile("jena-onto", ".ttl").toFile();
file.deleteOnExit();
final LocalStorage storage = new FileStorage(createConfiguration(file.getAbsolutePath()));
storage.begin(ReadWrite.WRITE);
final IllegalStateException ex = assertThrows(IllegalStateException.class, storage::reload);
assertThat(ex.getMessage(), containsString("Cannot reload storage which is in transaction"));
}
}