fixed problem which caused test skipping

src/test/java/it/unibz/inf/isochrone/db/DatabaseTest.java

@@ -22,8 +22,6 @@ public class DatabaseTest {
 	private static final int EXPECTED_NODE_COUNT = 2687;
 	private static final int LINK_ID = 1846;
 	private static final int NODE_ID = 5013;
-
-	private Database db;
 	private Map<Integer, Node> nodes;
 	private Map<Integer, Link> links;
 
@@ -31,9 +29,6 @@ public class DatabaseTest {
 	public void setUp() {
 		nodes = new HashMap<Integer, Node>();
 		links = new LinkedHashMap<Integer, Link>();
-
-		db = new Database(Dataset.BZ, Mode.MULTIMODAL, Direction.INCOMING);
-		db.readNetwork(nodes, links);
 	}
 
 	@AfterTest
@@ -47,6 +42,7 @@ public class DatabaseTest {
 
 	@Test
 	public void testCreateDatabaseObject() {
+		final Database db = new Database(Dataset.BZ, Mode.MULTIMODAL, Direction.INCOMING);
 		Assert.assertNotNull(db, "Database object could not be created!");
 	}
 
@@ -56,12 +52,16 @@ public class DatabaseTest {
 		final LinkedHashMap<Integer, Link> compareLinks = new LinkedHashMap<Integer, Link>();
 		fillHashMaps(compareNodes, compareLinks);
 
+		initDb();
+
 		Assert.assertEquals(nodes.get(NODE_ID), compareNodes.get(NODE_ID), "Nodes comparison");
 		Assert.assertEquals(links.get(LINK_ID), compareLinks.get(LINK_ID), "Links comparison");
 	}
 
 	@Test
 	public void testCountEdges() {
+		initDb();
+
 		// 2687 Doesn't correspond to the number of nodes in
 		// the nodes table, but the number of distinct
 		// target/source node in the edges table
@@ -71,6 +71,13 @@ public class DatabaseTest {
 
 	// Private methods
 
+	private Database initDb() {
+		final Database db = new Database(Dataset.BZ, Mode.MULTIMODAL, Direction.INCOMING);
+		db.readNetwork(nodes, links);
+
+		return db;
+	}
+
 	private void fillHashMaps(final HashMap<Integer, Node> nodeHashMap, final LinkedHashMap<Integer, Link> linkHashMap) {
 		final Node n1 = new Node(NODE_ID);