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FileStorageTest.java
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FileStorageTest.java
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package cz.cvut.kbss.ontodriver.jena.connector;
import cz.cvut.kbss.ontodriver.OntologyStorageProperties;
import cz.cvut.kbss.ontodriver.config.Configuration;
import cz.cvut.kbss.ontodriver.jena.JenaDataSource;
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.vocabulary.RDF;
import org.junit.Test;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.net.URI;
import java.nio.file.Files;
import java.util.List;
import static org.hamcrest.CoreMatchers.containsString;
import static org.junit.Assert.*;
public class FileStorageTest {
@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 Storage result = new FileStorage(
new Configuration(OntologyStorageProperties.driver(JenaDataSource.class.toString()).physicalUri(
URI.create(file.getAbsolutePath())).build()));
result.initialize();
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 Storage result = new FileStorage(
new Configuration(OntologyStorageProperties.driver(JenaDataSource.class.toString()).physicalUri(
URI.create(filePath)).build()));
result.initialize();
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 Storage storage = new FileStorage(
new Configuration(OntologyStorageProperties.driver(JenaDataSource.class.toString()).physicalUri(
URI.create(file.getAbsolutePath())).build()));
storage.initialize();
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));
}
}