Add the delete mutation for projects

lib/decidim/api/budget_mutation_type.rb

@@ -23,6 +23,12 @@ class BudgetMutationType < GraphQL::Schema::Object
         argument :attributes, ProjectAttributes, required: true
       end
 
+      field :delete_project, Decidim::Budgets::ProjectType, null: false do
+        description "A mutation to delete a project within a budget."
+
+        argument :id, GraphQL::Types::ID, required: true
+      end
+
       def create_project(attributes:)
         enforce_permission_to :create, :project
 
@@ -47,10 +53,10 @@ def create_project(attributes:)
       end
 
       def update_project(id:, attributes:)
-        enforce_permission_to :update, :project, project: object
+        project = object.projects.find(id)
+        enforce_permission_to :update, :project, project: project
 
         form = project_form_from(attributes)
-        project = object.projects.find(id)
         Decidim::Budgets::Admin::UpdateProject.call(form, project) do
           on(:ok) do
             return project
@@ -67,6 +73,21 @@ def update_project(id:, attributes:)
         )
       end
 
+      def delete_project(id:)
+        project = object.projects.find(id)
+        enforce_permission_to :destroy, :project, project: project
+
+        Decidim::Budgets::Admin::DestroyProject.call(project, current_user) do
+          on(:ok) do
+            return project
+          end
+        end
+
+        GraphQL::ExecutionError.new(
+          I18n.t("decidim.budgets.admin.projects.destroy.invalid")
+        )
+      end
+
       private
 
       def project_form_from(attributes, project = nil)

spec/types/decidim/budgeting_pipeline/budget_mutation_type_spec.rb

@@ -138,13 +138,13 @@
     context "with no user" do
       let!(:current_user) { nil }
 
-      it "does not allow creating the project" do
+      it "does not allow updating the project" do
         expect { response }.to raise_error(Decidim::BudgetingPipeline::ActionForbidden)
       end
     end
 
     context "with a participant user" do
-      it "does not allow creating the project" do
+      it "does not allow updating the project" do
         expect { response }.to raise_error(Decidim::BudgetingPipeline::ActionForbidden)
       end
     end
@@ -205,6 +205,39 @@
     end
   end
 
+  describe "deleteProject" do
+    let!(:project) { create(:budgeting_pipeline_project, budget: model) }
+    let(:query) { "{ deleteProject(id: #{project.id}) { id } }" }
+
+    context "with no user" do
+      let!(:current_user) { nil }
+
+      it "does not allow deleting the project" do
+        expect do
+          expect { response }.to raise_error(Decidim::BudgetingPipeline::ActionForbidden)
+        end.not_to change(Decidim::Budgets::Project, :count)
+      end
+    end
+
+    context "with a participant user" do
+      it "does not allow deleting the project" do
+        expect do
+          expect { response }.to raise_error(Decidim::BudgetingPipeline::ActionForbidden)
+        end.not_to change(Decidim::Budgets::Project, :count)
+      end
+    end
+
+    context "with an admin user" do
+      let!(:current_user) { create(:user, :confirmed, :admin, organization: current_organization) }
+
+      it "deletes the project" do
+        expect { response }.to change(Decidim::Budgets::Project, :count).by(-1)
+
+        expect(response["deleteProject"]).to eq("id" => project.id.to_s)
+      end
+    end
+  end
+
   def attributes_to_graphql(attributes)
     payload = attributes.map do |key, value|
       case value