test(dijkstra): fix before annotation on init

be-graphes-algos/src/test/java/org/insa/graphs/algorithm/shortestpath/DijkstraAlgorithmTest.java

@@ -15,6 +15,7 @@ import org.insa.graphs.model.io.BinaryGraphReader;
 import org.insa.graphs.model.io.BinaryPathReader;
 import org.insa.graphs.model.io.GraphReader;
 import org.insa.graphs.model.io.PathReader;
+import org.junit.BeforeClass;
 import org.junit.Test;
 
 public class DijkstraAlgorithmTest {
@@ -26,7 +27,7 @@ public class DijkstraAlgorithmTest {
     public Path path;
 
 
-    //@Before
+    @BeforeClass
     public void init() {
         // Visit these directory to see the list of available files on Commetud.
         // When running with VSC, paths are relative to the BE_Graphes directory.
@@ -40,9 +41,13 @@ public class DijkstraAlgorithmTest {
 
             // Read the graph. X
             this.graph = reader.read();
+            // free resources
+            reader.close();
 
             // Create a PathReader.
             final PathReader pathReader = new BinaryPathReader(new DataInputStream(new BufferedInputStream(new FileInputStream(pathName))));
+            // free resources
+            pathReader.close();
 
             // Read the path.
             this.path = pathReader.readPath(graph);