Add label_file_spec.rb

spec/graphql/mutation/files/label_file_spec.rb

@@ -0,0 +1,92 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+module Mutations
+  module Files
+    module LabelFileSpec
+      include ActiveJob::TestHelper
+
+      RSpec.describe LabelFile, type: :request do
+        let(:file) { create(:file_record) }
+        let(:label) { create(:label) }
+        let(:variables) do
+          {
+            input: {
+              fileId: file.id,
+              labelId: label.id
+            }
+          }
+        end
+
+        describe '.resolve' do
+          it 'attaches the label to the file' do
+            expect do
+              post '/graphql', params: { query:, variables: }
+            end.to change { file.labels.count }.by(1)
+          end
+
+          it 'returns the label and the file' do
+            post '/graphql', params: { query:, variables: }
+            json = JSON.parse(response.body)
+            data = json['data']['labelFile']
+
+            expect(data['label']).to include(
+              'id' => label.id.to_s
+            )
+            expect(data['file']).to include(
+              'id' => file.id.to_s
+            )
+          end
+
+          context 'with invalid arguments' do
+            let(:variables) do
+              {
+                input: {
+                  fileId: file.id,
+                  labelId: ''
+                }
+              }
+            end
+            it 'does not create a label' do
+              expect do
+                post '/graphql', params: { query:, variables: }
+              end.to change { file.labels.count }.by(0)
+            end
+
+            it 'returns a nil label' do
+              post '/graphql', params: { query:, variables: }
+              json = JSON.parse(response.body)
+              data = json['data']['labelFile']
+
+              expect(data['label']).to be_nil
+            end
+
+            it 'returns a nil file' do
+              post '/graphql', params: { query:, variables: }
+              json = JSON.parse(response.body)
+              data = json['data']['labelFile']
+
+              expect(data['file']).to be_nil
+            end
+          end
+        end
+
+        def query
+          <<~GQL
+            mutation LabelFile($input: LabelFileInput!) {
+              labelFile(input: $input) {
+                file {
+                  id
+                }
+                label {
+                  id
+                }
+              }
+            }
+          GQL
+        end
+      end
+    end
+  end
+end