Add the service's test for deleting.

features/backup_plan_model_delete.feature

@@ -0,0 +1,14 @@
+Feature: Delete a backup plan
+
+  @fixture.injector
+  @fixture.in_memory_database
+  @fixture.seeds
+  Scenario Outline: Deleting a backup plan with the CLI
+    Given I have a backup plan with id="<existing_backup_plan_id>"
+    When I remove the backup plan with id="<backup_plan_id>"
+    Then the result should be "<result>"
+
+    Examples:
+      | backup_plan_id                       | existing_backup_plan_id              | result  | description                |
+      | 8aa59e7e-dc75-459b-beb5-b710b39be583 | 8aa59e7e-dc75-459b-beb5-b710b39be583 | success | delete an existing plan    |
+      | 8aa59e7e-dc75-459b-aeb5-b710b39be583 | 8aa59e7e-dc75-459b-beb5-b710b39be512 | error   | delete a non-existing plan |

features/steps/backup_plan_model_steps.py

@@ -1,7 +1,9 @@
 from behave import given, when, then
 import json
-from tui_rsync.core.components.backup_plan.domain import BackupPlan, Source, Destination
 
+from tui_rsync.core.components.backup_plan.application.services.backup_plan_service import BackupPlanService
+from tui_rsync.core.components.backup_plan.domain import BackupPlan, Source, Destination
+from tui_rsync.core.shared_kernel.components.common import UUID
 
 
 @given('the label "{label}"')
@@ -48,6 +50,14 @@ def add_backup_plan(context):
         context.exception_raised = False
 
 
+@when('I remove the backup plan with id="{backup_plan_id}"')
+def given_existing_backup_plan_id_seed(context, backup_plan_id):
+    context.backup_plan_service = context.injector.get(BackupPlanService)
+    context.deleted_result = context.backup_plan_service.delete(UUID(backup_plan_id))
+    # TODO error value or exception?
+    context.exception_raised = not context.deleted_result
+
+
 def compare_destinations(actual: list[Destination], expected: list[str]) -> bool:
     actual_path_set = {destionation.path for destionation in actual}
     return actual_path_set == set(expected)
@@ -71,3 +81,14 @@ def backup_plan_has_deleted(context):
     assert context.exception_raised == False
     assert context.backup_plan is None
     assert context.deleted_result
+
+
+@then('the result should be "{result}"')
+def then_cli_executed_successfully(context, result):
+    match result:
+        case "success":
+            assert context.exception_raised == False
+        case "error":
+            assert context.exception_raised
+
+