Increase GraphqlDevise::GraphqlController coverage

spec/rails_helper.rb

@@ -38,7 +38,6 @@
   config.include(Requests::JsonHelpers, type: :request)
   config.include(Requests::AuthHelpers, type: :request)
   config.include(ActiveSupport::Testing::TimeHelpers)
-  config.include(Generators::FileHelpers, type: :generator)
 
   config.before(:suite) do
     ActionController::Base.allow_forgery_protection = true

spec/requests/graphql_controller_spec.rb

@@ -0,0 +1,60 @@
+require 'rails_helper'
+
+RSpec.describe GraphqlDevise::GraphqlController do
+  let(:password) { 'password123' }
+  let(:user)     { create(:user, :confirmed, password: password) }
+
+  context 'when variables are a string' do
+    it 'parses the string variables' do
+      post '/api/v1/graphql_auth',
+           params: {
+             query:     "mutation($email: String!) { userLogin(email: $email, password: \"#{password}\") { user { email name signInCount } } }",
+             variables: "{\"email\": \"#{user.email}\"}"
+
+           }
+
+      expect(json_response).to match(
+        data: { userLogin: { user: { email: user.email, name: user.name, signInCount: 1 } } }
+      )
+    end
+  end
+
+  context 'when variables are not a string or hash' do
+    it 'raises an error' do
+      expect do
+        post '/api/v1/graphql_auth',
+             params: {
+               query:     "mutation($email: String!) { userLogin(email: $email, password: \"#{password}\") { user { email name signInCount } } }",
+               variables: 1
+
+             }
+      end.to raise_error(ArgumentError)
+    end
+  end
+
+  context 'when multiplexing queries' do
+    it 'executes multiple queries in the same request' do
+      post '/api/v1/graphql_auth',
+           params: {
+             _json: [
+               { query: "mutation { userLogin(email: \"#{user.email}\", password: \"#{password}\") { user { email name signInCount } } }" },
+               { query: "mutation { userLogin(email: \"#{user.email}\", password: \"wrong password\") { user { email name signInCount } } }" }
+             ]
+           }
+
+      expect(json_response).to match(
+        [
+          { data: { userLogin: { user: { email: user.email, name: user.name, signInCount: 1 } } } },
+          {
+            data:   { userLogin: nil },
+            errors: [
+              hash_including(
+                message: 'Invalid login credentials. Please try again.', extensions: { code: 'USER_ERROR' }
+              )
+            ]
+          }
+        ]
+      )
+    end
+  end
+end