App/Sources/View Models/TaskListViewModel.swift

@@ -1,3 +1,4 @@
+import Foundation
 import SwiftData
 import SwiftUI
 
@@ -84,6 +85,26 @@ extension TaskListView {
 
         // MARK: Methods
 
+        /// Deletes tasks at the specified indices.
+        ///
+        /// This method removes tasks from the model context after a swipe-to-delete action.
+        /// The deletion is performed through SwiftData's model context, which handles
+        /// persistence and triggers automatic UI updates.
+        ///
+        /// - Parameters:
+        ///   - tasks: The current array of tasks.
+        ///   - offsets: The index set of tasks to delete.
+        ///   - modelContext: The SwiftData model context to perform the deletion.
+        func deleteTasks(
+            _ tasks: [Todo],
+            at offsets: IndexSet,
+            from modelContext: ModelContext
+        ) {
+            for index in offsets {
+                modelContext.delete(tasks[index])
+            }
+        }
+
         /// Reorders tasks after a drag and drop operation.
         ///
         /// This method is called when users drag and drop tasks to reorder them within a group.

UnitTests/Tests/View Models/TaskListViewModelTests.swift

@@ -91,6 +91,45 @@ struct TaskListViewModelTests {
 
     // MARK: Method tests
 
+    @Test("deleteTasks removes a single task from model context")
+    func deleteTasksSingle() throws {
+        // GIVEN
+        let container = try ModelContainer(
+            for: Todo.self,
+            configurations: .init(isStoredInMemoryOnly: true)
+        )
+        let context = ModelContext(container)
+
+        let viewModel = TaskListView.ViewModel(group: .today)
+        let todosToInsert: [Todo] = [
+            .init(title: "Task 1", due: .now, order: 0),
+            .init(title: "Task 2", due: .now, order: 1),
+            .init(title: "Task 3", due: .now, order: 2),
+        ]
+        let countInitial = todosToInsert.count
+
+        for todo in todosToInsert {
+            context.insert(todo)
+        }
+
+        // WHEN
+        viewModel.deleteTasks(
+            todosToInsert,
+            at: IndexSet(integer: 1),
+            from: context
+        )
+
+        // THEN
+        let descriptor = FetchDescriptor<Todo>()
+        let todos = try context.fetch(descriptor)
+
+        #expect(countInitial == 3)
+        #expect(todos.count == 2)
+        #expect(todos.contains(where: { $0.title == "Task 1" }))
+        #expect(todos.contains(where: { $0.title == "Task 3" }))
+        #expect(!todos.contains(where: { $0.title == "Task 2" }))
+    }
+
     @Test("reorderTasks updates order property when moving task forward")
     func reorderTasksMovingForward() {
         // GIVEN