Fixed tests for jobs_request_post_spec

Added a test to validate Variables in jobs_request_post_spec
Updated other tests to expect an empty Variables property

spec/factories/ci/builds.rb

@@ -443,7 +443,7 @@ FactoryBot.define do
       options do
         {
           image: { name: 'ruby:2.7', entrypoint: '/bin/sh' },
-          services: ['postgres', { name: 'docker:stable-dind', entrypoint: '/bin/sh', command: 'sleep 30', alias: 'docker' }],
+          services: ['postgres', { name: 'docker:stable-dind', entrypoint: '/bin/sh', command: 'sleep 30', alias: 'docker' }, { name: 'mysql:latest', variables: { MYSQL_ROOT_PASSWORD: 'root123.' } }],
           script: %w(echo),
           after_script: %w(ls date),
           artifacts: {

spec/requests/api/ci/runner/jobs_request_post_spec.rb

@@ -218,9 +218,11 @@ RSpec.describe API::Ci::Runner, :clean_gitlab_redis_shared_state do
             expect(json_response['git_info']).to eq(expected_git_info)
             expect(json_response['image']).to eq({ 'name' => 'ruby:2.7', 'entrypoint' => '/bin/sh', 'ports' => [] })
             expect(json_response['services']).to eq([{ 'name' => 'postgres', 'entrypoint' => nil,
-                                                       'alias' => nil, 'command' => nil, 'ports' => [] },
+                                                       'alias' => nil, 'command' => nil, 'ports' => [], 'variables' => nil },
                                                      { 'name' => 'docker:stable-dind', 'entrypoint' => '/bin/sh',
-                                                       'alias' => 'docker', 'command' => 'sleep 30', 'ports' => [] }])
+                                                       'alias' => 'docker', 'command' => 'sleep 30', 'ports' => [], 'variables' => [] },
+                                                     { 'name' => 'mysql:latest', 'entrypoint' => nil,
+                                                       'alias' => nil, 'command' => nil, 'ports' => [], 'variables' => [{ key: 'MYSQL_ROOT_PASSWORD', value: 'root123.' }.as_json] }])
             expect(json_response['steps']).to eq(expected_steps)
             expect(json_response['artifacts']).to eq(expected_artifacts)
             expect(json_response['cache']).to eq(expected_cache)