feat: add error handling for unsolvable Sudoku and rename test class for clarity

app/src/main/java/sudoku/ResolveurBacktraceSimple.java

@@ -2,12 +2,18 @@ package sudoku;
 
 import java.util.List;
 
+import sudoku.core.Console;
+
 public class ResolveurBacktraceSimple implements Resolveur {
 
     @Override
     public boolean resoudre(Sudoku s, boolean afficherEtape) {
         EtatResolution etat = new EtatResolution(0, 0);
-        return resoudre(s, afficherEtape, etat);
+        boolean solved = resoudre(s, afficherEtape, etat);
+        if (!solved) {
+            Console.errorln("Ce Sudoku n'a pas de solution");
+        }
+        return solved;
     }
 
     private boolean resoudre(Sudoku s, boolean afficherEtape, EtatResolution etat) {

app/src/test/java/sudoku/TestCreationGrilleRectangulaireSansSolution.java

@@ -5,9 +5,9 @@ import org.junit.jupiter.api.Test;
 import java.util.ArrayList;
 import java.util.Arrays;
 
-public class TestCreationGrille {
+public class TestCreationGrilleRectangulaireSansSolution {
     @Test
-    public void testLigne() {
+    public void testCreationGrilleSansSolution() {
         // CREATION D'UN SUDOKU SIMPLE 12*12
         Sudoku sudoku = new Sudoku(12);
         sudoku.getGrille().setSymbolesPossibles(new ArrayList<>(Arrays.asList(
@@ -98,6 +98,12 @@ public class TestCreationGrille {
         sudoku.getGrille().printBlocs();
         System.out.println("Symboles possibles :");
         sudoku.getGrille().printSymbolesPossibles();
+
+        ResolveurBacktraceSimple resolveur = new ResolveurBacktraceSimple();
+        boolean solved = resolveur.resoudre(sudoku, false);
+        System.out.println("Sudoku " + (solved ? "résolu" : "non résolu") + " :");
+        System.out.println(sudoku.getGrille().toString());
+
         System.out.println("FIN TEST LIGNE");
     }
 }