Add hurl test for task deletion.

backend/tests/api/delete_tasks.hurl

@@ -0,0 +1,92 @@
+# Task Delete API Tests
+
+# Setup: Create a task to delete
+POST {{host}}/api/tasks
+Content-Type: application/json
+{
+  "title": "Task to Delete",
+  "description": "This task will be deleted"
+}
+
+HTTP 201
+[Captures]
+delete_task_id: jsonpath "$.id"
+
+# Test: Delete task successfully
+DELETE {{host}}/api/tasks/{{delete_task_id}}
+
+HTTP 204
+
+# Test: Verify task is deleted (should return 404)
+GET {{host}}/api/tasks/{{delete_task_id}}
+
+HTTP 404
+[Asserts]
+jsonpath "$.error" exists
+
+# Setup: Create another task for additional tests
+POST {{host}}/api/tasks
+Content-Type: application/json
+{
+  "title": "Another Task to Delete"
+}
+
+HTTP 201
+[Captures]
+another_task_id: jsonpath "$.id"
+
+# Test: Verify task exists before deletion
+GET {{host}}/api/tasks/{{another_task_id}}
+
+HTTP 200
+[Asserts]
+jsonpath "$.title" == "Another Task to Delete"
+
+# Test: Delete the task
+DELETE {{host}}/api/tasks/{{another_task_id}}
+
+HTTP 204
+
+# Test: Confirm task no longer exists
+GET {{host}}/api/tasks/{{another_task_id}}
+
+HTTP 404
+[Asserts]
+jsonpath "$.error" exists
+
+# Test: Delete non-existent task
+DELETE {{host}}/api/tasks/00000000-0000-0000-0000-000000000000
+
+HTTP 404
+[Asserts]
+jsonpath "$.error" exists
+
+# Test: Delete with invalid UUID format
+DELETE {{host}}/api/tasks/invalid-uuid-format
+
+HTTP 400
+[Asserts]
+jsonpath "$.error" exists
+
+# Test: Multiple deletions of same task (idempotency test)
+POST {{host}}/api/tasks
+Content-Type: application/json
+{
+  "title": "Task for Idempotency Test"
+}
+
+HTTP 201
+[Captures]
+idempotent_task_id: jsonpath "$.id"
+
+# First deletion should succeed
+DELETE {{host}}/api/tasks/{{idempotent_task_id}}
+
+HTTP 204
+
+# Second deletion should return 404 (task already gone)
+DELETE {{host}}/api/tasks/{{idempotent_task_id}}
+
+HTTP 404
+[Asserts]
+jsonpath "$.error" exists