added integration test for schedule generation

src/main/java/org/example/se302/test/ScheduleGeneratorTest.java

@@ -0,0 +1,96 @@
+package org.example.se302.test;
+
+import org.example.se302.model.ExamAssignment;
+import org.example.se302.model.ScheduleConfiguration;
+import org.example.se302.service.DataImportService;
+import org.example.se302.service.DataManager;
+import org.example.se302.service.ScheduleGeneratorService;
+
+import java.io.File;
+
+/**
+ * Simple test to verify schedule generation works with sample data.
+ */
+public class ScheduleGeneratorTest {
+
+    public static void main(String[] args) {
+        System.out.println("=== Schedule Generator Test ===\n");
+
+        // Step 1: Import sample data
+        System.out.println("Step 1: Importing sample data...");
+        DataManager dataManager = DataManager.getInstance();
+        DataImportService importService = new DataImportService();
+
+        try {
+            importService.importStudents(new File("sampleData/sampleData_AllStudents.csv"));
+            System.out.println("  ✓ Imported " + dataManager.getTotalStudents() + " students");
+
+            importService.importCourses(new File("sampleData/sampleData_AllCourses.csv"));
+            System.out.println("  ✓ Imported " + dataManager.getTotalCourses() + " courses");
+
+            importService.importClassrooms(new File("sampleData/sampleData_AllClassroomsAndTheirCapacities.csv"));
+            System.out.println("  ✓ Imported " + dataManager.getTotalClassrooms() + " classrooms");
+
+            importService.importEnrollments(new File("sampleData/sampleData_AllAttendanceLists.csv"));
+            System.out.println("  ✓ Imported enrollment data\n");
+
+        } catch (Exception e) {
+            System.err.println("Error importing data: " + e.getMessage());
+            e.printStackTrace();
+            return;
+        }
+
+        // Step 2: Create schedule configuration
+        System.out.println("Step 2: Creating schedule configuration...");
+        ScheduleConfiguration config = new ScheduleConfiguration(
+            5,  // 5 days
+            4,  // 4 slots per day
+            ScheduleConfiguration.OptimizationStrategy.DEFAULT
+        );
+        System.out.println("  ✓ Configuration: " + config.getNumDays() + " days, "
+                         + config.getSlotsPerDay() + " slots/day = "
+                         + config.getTotalSlots() + " total slots\n");
+
+        // Step 3: Generate schedule
+        System.out.println("Step 3: Generating schedule...");
+        ScheduleGeneratorService generator = new ScheduleGeneratorService();
+
+        // Add progress listener
+        generator.setProgressListener((progress, message) -> {
+            System.out.printf("  [%.0f%%] %s\n", progress * 100, message);
+        });
+
+        ScheduleGeneratorService.ScheduleResult result = generator.generateSchedule(config);
+
+        // Step 4: Display results
+        System.out.println("\n=== RESULT ===");
+        if (result.isSuccess()) {
+            System.out.println("✓ SUCCESS: Schedule generated!");
+            System.out.println("Message: " + result.getMessage());
+
+            // Show some assignments
+            System.out.println("\nSample assignments:");
+            int count = 0;
+            for (ExamAssignment assignment : result.getScheduleState().getAssignments().values()) {
+                if (assignment.isAssigned() && count < 5) {
+                    System.out.println("  " + assignment.toDisplayString());
+                    count++;
+                }
+            }
+            if (result.getScheduleState().getAssignments().size() > 5) {
+                System.out.println("  ... and " +
+                    (result.getScheduleState().getAssignments().size() - 5) + " more");
+            }
+
+        } else if (result.wasCancelled()) {
+            System.out.println("⚠ CANCELLED: " + result.getMessage());
+        } else {
+            System.out.println("✗ FAILED: " + result.getMessage());
+            System.out.println("\nPossible solutions:");
+            System.out.println("  - Increase number of days");
+            System.out.println("  - Increase slots per day");
+            System.out.println("  - Add more classrooms");
+            System.out.println("  - Relax constraints");
+        }
+    }
+}