added testing

src/test/java/b_application_business_rules/use_cases/project_viewing_and_modification_use_cases/ChangeTaskCompletionStatusTest.java

@@ -0,0 +1,60 @@
+package b_application_business_rules.use_cases.project_viewing_and_modification_use_cases;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+
+import b_application_business_rules.use_cases.project_viewing_and_modification_use_cases.ChangeTaskCompletionStatus;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import a_enterprise_business_rules.entities.Column;
+import a_enterprise_business_rules.entities.Project;
+import a_enterprise_business_rules.entities.Task;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+
+public class ChangeTaskCompletionStatusTest {
+
+    private Project project;
+    private ChangeTaskCompletionStatus changeTaskCompletionStatus;
+
+    @BeforeEach
+    public void setUp() {
+        // Set up your test environment here, including creating a sample project and tasks
+        // For example:
+        List<Task> tasks = new ArrayList<>();
+        tasks.add(new Task("Task 1", UUID.randomUUID(), "", false, null));
+        tasks.add(new Task("Task 2", UUID.randomUUID(), "", true, null));
+
+        List<Column> columns = new ArrayList<>();
+        columns.add(new Column("Column 1", tasks, UUID.randomUUID()));
+
+        project = new Project("Sample Project",UUID.randomUUID(),"", columns);
+
+        changeTaskCompletionStatus = new ChangeTaskCompletionStatus(project);
+    }
+
+    @Test
+    public void testChangeCompletionStatus() {
+        // Test changing the completion status of an existing task
+        Task taskToUpdate = project.getColumns().get(0).getTasks().get(0);
+        UUID taskID = taskToUpdate.getID();
+
+        Task updatedTask = changeTaskCompletionStatus.changeCompletionStatus(taskID);
+
+        assertEquals(taskToUpdate, updatedTask, "Task should have been updated");
+        assertEquals(!taskToUpdate.getCompletionStatus(), updatedTask.getCompletionStatus(), "Completion status should be toggled");
+    }
+
+    @Test
+    public void testChangeCompletionStatusNonExistentTask() {
+        // Test changing the completion status of a non-existent task
+        UUID nonExistentTaskID = UUID.randomUUID();
+
+        Task updatedTask = changeTaskCompletionStatus.changeCompletionStatus(nonExistentTaskID);
+
+        assertNull(updatedTask, "No task should be updated for a non-existent task ID");
+    }
+}