Expose ApplicationSetting visibility settings as String

Use strings for the ApplicationSetting properties:
 - restricted_visibility_levels
 - default_project_visibility
 - default_snippet_visibility
 - default_group_visibility

9 files changed, 281 insertions, 16 deletions

diff --git a/app/models/application_setting.rb b/app/models/application_setting.rb
index dc36c754438..d6d17195bd3 100644
--- a/app/models/application_setting.rb
+++ b/app/models/application_setting.rb
@@ -179,6 +179,7 @@ class ApplicationSetting < ActiveRecord::Base
       default_project_visibility: Settings.gitlab.default_projects_features['visibility_level'],
       default_projects_limit: Settings.gitlab['default_projects_limit'],
       default_snippet_visibility: Settings.gitlab.default_projects_features['visibility_level'],
+      default_group_visibility: Settings.gitlab.default_projects_features['visibility_level'],
       disabled_oauth_sign_in_sources: [],
       domain_whitelist: Settings.gitlab['domain_whitelist'],
       gravatar_enabled: Settings.gravatar['enabled'],
diff --git a/doc/api/settings.md b/doc/api/settings.md
index 3a33a3b5f63..38a37cd920c 100644
--- a/doc/api/settings.md
+++ b/doc/api/settings.md
@@ -32,12 +32,13 @@ Example response:
    "updated_at" : "2016-01-04T15:44:55.176Z",
    "session_expire_delay" : 10080,
    "home_page_url" : null,
-   "default_snippet_visibility" : 0,
+   "default_snippet_visibility" : "private",
    "domain_whitelist" : [],
    "domain_blacklist_enabled" : false,
    "domain_blacklist" : [],
    "created_at" : "2016-01-04T15:44:55.176Z",
-   "default_project_visibility" : 0,
+   "default_project_visibility" : "private",
+   "default_group_visibility" : "private",
    "gravatar_enabled" : true,
    "sign_in_text" : null,
    "container_registry_token_expire_delay": 5,
@@ -66,11 +67,12 @@ PUT /application/settings
 | `sign_in_text`      | string  | no  | Text on login page |
 | `home_page_url`     | string  | no  | Redirect to this URL when not logged in |
 | `default_branch_protection` | integer | no | Determine if developers can push to master. Can take `0` _(not protected, both developers and masters can push new commits, force push or delete the branch)_, `1` _(partially protected, developers can push new commits, but cannot force push or delete the branch, masters can do anything)_ or `2` _(fully protected, developers cannot push new commits, force push or delete the branch, masters can do anything)_ as a parameter. Default is `2`. |
-| `restricted_visibility_levels` | array of integers | no | Selected levels cannot be used by non-admin users for projects or snippets. Can take `0` _(Private)_, `1` _(Internal)_ and `2` _(Public)_ as a parameter. Default is null which means there is no restriction. |
+| `restricted_visibility_levels` | array of strings | no | Selected levels cannot be used by non-admin users for projects or snippets. Can take `private`, `internal` and `public` as a parameter. Default is null which means there is no restriction. |
 | `max_attachment_size` | integer | no | Limit attachment size in MB |
 | `session_expire_delay` | integer | no | Session duration in minutes. GitLab restart is required to apply changes |
-| `default_project_visibility` | integer | no | What visibility level new projects receive. Can take `0` _(Private)_, `1` _(Internal)_ and `2` _(Public)_ as a parameter. Default is `0`.|
-| `default_snippet_visibility` | integer | no | What visibility level new snippets receive. Can take `0` _(Private)_, `1` _(Internal)_ and `2` _(Public)_ as a parameter. Default is `0`.|
+| `default_project_visibility` | string | no | What visibility level new projects receive. Can take `private`, `internal` and `public` as a parameter. Default is `private`.|
+| `default_snippet_visibility` | string | no | What visibility level new snippets receive. Can take `private`, `internal` and `public` as a parameter. Default is `private`.|
+| `default_group_visibility` | string | no | What visibility level new groups receive. Can take `private`, `internal` and `public` as a parameter. Default is `private`.|
 | `domain_whitelist` | array of strings | no | Force people to use only corporate emails for sign-up. Default is null, meaning there is no restriction. |
 | `domain_blacklist_enabled` | boolean | no | Enable/disable the `domain_blacklist` |
 | `domain_blacklist` | array of strings | yes (if `domain_blacklist_enabled` is `true`) | People trying to sign-up with emails from this domain will not be allowed to do so. |
@@ -88,7 +90,7 @@ PUT /application/settings
 | `terminal_max_session_time` | integer | no | Maximum time for web terminal websocket connection (in seconds). Set to 0 for unlimited time. |
 
 ```bash
-curl --request PUT --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v4/application/settings?signup_enabled=false&default_project_visibility=1
+curl --request PUT --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v4/application/settings?signup_enabled=false&default_project_visibility=internal
 ```
 
 Example response:
@@ -108,8 +110,9 @@ Example response:
   "restricted_visibility_levels": [],
   "max_attachment_size": 10,
   "session_expire_delay": 10080,
-  "default_project_visibility": 1,
-  "default_snippet_visibility": 0,
+  "default_project_visibility": "internal",
+  "default_snippet_visibility": "private",
+  "default_group_visibility": "private",
   "domain_whitelist": [],
   "domain_blacklist_enabled" : false,
   "domain_blacklist" : [],
diff --git a/lib/api/api.rb b/lib/api/api.rb
index 69d981c58b5..02f7bc2fbbf 100644
--- a/lib/api/api.rb
+++ b/lib/api/api.rb
@@ -26,6 +26,7 @@ module API
       mount ::API::V3::Repositories
       mount ::API::V3::Runners
       mount ::API::V3::Services
+      mount ::API::V3::Settings
       mount ::API::V3::Snippets
       mount ::API::V3::Subscriptions
       mount ::API::V3::SystemHooks
diff --git a/lib/api/entities.rb b/lib/api/entities.rb
index fb067046fd2..ca18eec2f39 100644
--- a/lib/api/entities.rb
+++ b/lib/api/entities.rb
@@ -553,12 +553,14 @@ module API
       expose :updated_at
       expose :home_page_url
       expose :default_branch_protection
-      expose :restricted_visibility_levels
+      expose(:restricted_visibility_levels) do |setting, _options|
+        setting.restricted_visibility_levels.map { |level| Gitlab::VisibilityLevel.string_level(level) }
+      end
       expose :max_attachment_size
       expose :session_expire_delay
-      expose :default_project_visibility
-      expose :default_snippet_visibility
-      expose :default_group_visibility
+      expose(:default_project_visibility) { |setting, _options| Gitlab::VisibilityLevel.string_level(setting.default_project_visibility) }
+      expose(:default_snippet_visibility) { |setting, _options| Gitlab::VisibilityLevel.string_level(setting.default_snippet_visibility) }
+      expose(:default_group_visibility) { |setting, _options| Gitlab::VisibilityLevel.string_level(setting.default_group_visibility) }
       expose :default_artifacts_expire_in
       expose :domain_whitelist
       expose :domain_blacklist_enabled
diff --git a/lib/api/settings.rb b/lib/api/settings.rb
index 936c7e0930b..fef21f86f8c 100644
--- a/lib/api/settings.rb
+++ b/lib/api/settings.rb
@@ -7,6 +7,20 @@ module API
         @current_setting ||=
           (ApplicationSetting.current || ApplicationSetting.create_from_defaults)
       end
+
+      def map_setting_visibility_levels(attrs)
+        [:default_project_visibility, :default_snippet_visibility, :default_group_visibility].each do |param|
+          visibility = attrs.delete(param)
+          if visibility
+            attrs[param] = Gitlab::VisibilityLevel.string_options[visibility]
+          end
+        end
+        restricted_levels = attrs.delete(:restricted_visibility_levels)
+        if restricted_levels
+          attrs[:restricted_visibility_levels] = Gitlab::VisibilityLevel.string_options.values_at(*restricted_levels)
+        end
+        attrs
+      end
     end
 
     desc 'Get the current application settings' do
@@ -21,9 +35,9 @@ module API
     end
     params do
       optional :default_branch_protection, type: Integer, values: [0, 1, 2], desc: 'Determine if developers can push to master'
-      optional :default_project_visibility, type: Integer, values: Gitlab::VisibilityLevel.values, desc: 'The default project visibility'
-      optional :default_snippet_visibility, type: Integer, values: Gitlab::VisibilityLevel.values, desc: 'The default snippet visibility'
-      optional :default_group_visibility, type: Integer, values: Gitlab::VisibilityLevel.values, desc: 'The default group visibility'
+      optional :default_project_visibility, type: String, values: Gitlab::VisibilityLevel.string_values, desc: 'The default project visibility'
+      optional :default_snippet_visibility, type: String, values: Gitlab::VisibilityLevel.string_values, desc: 'The default snippet visibility'
+      optional :default_group_visibility, type: String, values: Gitlab::VisibilityLevel.string_values, desc: 'The default group visibility'
       optional :restricted_visibility_levels, type: Array[String], desc: 'Selected levels cannot be used by non-admin users for projects or snippets. If the public level is restricted, user profiles are only visible to logged in users.'
       optional :import_sources, type: Array[String], values: %w[github bitbucket gitlab google_code fogbugz git gitlab_project],
                                 desc: 'Enabled sources for code import during project creation. OmniAuth must be configured for GitHub, Bitbucket, and GitLab.com'
@@ -128,7 +142,9 @@ module API
                       :housekeeping_enabled, :terminal_max_session_time
     end
     put "application/settings" do
-      if current_settings.update_attributes(declared_params(include_missing: false))
+      attrs = map_setting_visibility_levels(declared_params(include_missing: false))
+
+      if current_settings.update_attributes(attrs)
         present current_settings, with: Entities::ApplicationSetting
       else
         render_validation_error!(current_settings)
diff --git a/lib/api/v3/entities.rb b/lib/api/v3/entities.rb
index da5b58cab9c..270d99a2348 100644
--- a/lib/api/v3/entities.rb
+++ b/lib/api/v3/entities.rb
@@ -150,6 +150,39 @@ module API
         expose :shared_projects, using: Entities::Project
       end
 
+      class ApplicationSetting < Grape::Entity
+        expose :id
+        expose :default_projects_limit
+        expose :signup_enabled
+        expose :signin_enabled
+        expose :gravatar_enabled
+        expose :sign_in_text
+        expose :after_sign_up_text
+        expose :created_at
+        expose :updated_at
+        expose :home_page_url
+        expose :default_branch_protection
+        expose :restricted_visibility_levels
+        expose :max_attachment_size
+        expose :session_expire_delay
+        expose :default_project_visibility
+        expose :default_snippet_visibility
+        expose :default_group_visibility
+        expose :domain_whitelist
+        expose :domain_blacklist_enabled
+        expose :domain_blacklist
+        expose :user_oauth_applications
+        expose :after_sign_out_path
+        expose :container_registry_token_expire_delay
+        expose :repository_storage
+        expose :repository_storages
+        expose :koding_enabled
+        expose :koding_url
+        expose :plantuml_enabled
+        expose :plantuml_url
+        expose :terminal_max_session_time
+      end
+
       class Environment < ::API::Entities::EnvironmentBasic
         expose :project, using: Entities::Project
       end
diff --git a/lib/api/v3/settings.rb b/lib/api/v3/settings.rb
new file mode 100644
index 00000000000..748d6b97d4f
--- /dev/null
+++ b/lib/api/v3/settings.rb
@@ -0,0 +1,137 @@
+module API
+  module V3
+    class Settings < Grape::API
+      before { authenticated_as_admin! }
+
+      helpers do
+        def current_settings
+          @current_setting ||=
+            (ApplicationSetting.current || ApplicationSetting.create_from_defaults)
+        end
+      end
+
+      desc 'Get the current application settings' do
+        success Entities::ApplicationSetting
+      end
+      get "application/settings" do
+        present current_settings, with: Entities::ApplicationSetting
+      end
+
+      desc 'Modify application settings' do
+        success Entities::ApplicationSetting
+      end
+      params do
+        optional :default_branch_protection, type: Integer, values: [0, 1, 2], desc: 'Determine if developers can push to master'
+        optional :default_project_visibility, type: Integer, values: Gitlab::VisibilityLevel.values, desc: 'The default project visibility'
+        optional :default_snippet_visibility, type: Integer, values: Gitlab::VisibilityLevel.values, desc: 'The default snippet visibility'
+        optional :default_group_visibility, type: Integer, values: Gitlab::VisibilityLevel.values, desc: 'The default group visibility'
+        optional :restricted_visibility_levels, type: Array[String], desc: 'Selected levels cannot be used by non-admin users for projects or snippets. If the public level is restricted, user profiles are only visible to logged in users.'
+        optional :import_sources, type: Array[String], values: %w[github bitbucket gitlab google_code fogbugz git gitlab_project],
+                                  desc: 'Enabled sources for code import during project creation. OmniAuth must be configured for GitHub, Bitbucket, and GitLab.com'
+        optional :disabled_oauth_sign_in_sources, type: Array[String], desc: 'Disable certain OAuth sign-in sources'
+        optional :enabled_git_access_protocol, type: String, values: %w[ssh http nil], desc: 'Allow only the selected protocols to be used for Git access.'
+        optional :gravatar_enabled, type: Boolean, desc: 'Flag indicating if the Gravatar service is enabled'
+        optional :default_projects_limit, type: Integer, desc: 'The maximum number of personal projects'
+        optional :max_attachment_size, type: Integer, desc: 'Maximum attachment size in MB'
+        optional :session_expire_delay, type: Integer, desc: 'Session duration in minutes. GitLab restart is required to apply changes.'
+        optional :user_oauth_applications, type: Boolean, desc: 'Allow users to register any application to use GitLab as an OAuth provider'
+        optional :user_default_external, type: Boolean, desc: 'Newly registered users will by default be external'
+        optional :signup_enabled, type: Boolean, desc: 'Flag indicating if sign up is enabled'
+        optional :send_user_confirmation_email, type: Boolean, desc: 'Send confirmation email on sign-up'
+        optional :domain_whitelist, type: String, desc: 'ONLY users with e-mail addresses that match these domain(s) will be able to sign-up. Wildcards allowed. Use separate lines for multiple entries. Ex: domain.com, *.domain.com'
+        optional :domain_blacklist_enabled, type: Boolean, desc: 'Enable domain blacklist for sign ups'
+        given domain_blacklist_enabled: ->(val) { val } do
+          requires :domain_blacklist, type: String, desc: 'Users with e-mail addresses that match these domain(s) will NOT be able to sign-up. Wildcards allowed. Use separate lines for multiple entries. Ex: domain.com, *.domain.com'
+        end
+        optional :after_sign_up_text, type: String, desc: 'Text shown after sign up'
+        optional :signin_enabled, type: Boolean, desc: 'Flag indicating if sign in is enabled'
+        optional :require_two_factor_authentication, type: Boolean, desc: 'Require all users to setup Two-factor authentication'
+        given require_two_factor_authentication: ->(val) { val } do
+          requires :two_factor_grace_period, type: Integer, desc: 'Amount of time (in hours) that users are allowed to skip forced configuration of two-factor authentication'
+        end
+        optional :home_page_url, type: String, desc: 'We will redirect non-logged in users to this page'
+        optional :after_sign_out_path, type: String, desc: 'We will redirect users to this page after they sign out'
+        optional :sign_in_text, type: String, desc: 'The sign in text of the GitLab application'
+        optional :help_page_text, type: String, desc: 'Custom text displayed on the help page'
+        optional :shared_runners_enabled, type: Boolean, desc: 'Enable shared runners for new projects'
+        given shared_runners_enabled: ->(val) { val } do
+          requires :shared_runners_text, type: String, desc: 'Shared runners text '
+        end
+        optional :max_artifacts_size, type: Integer, desc: "Set the maximum file size each build's artifacts can have"
+        optional :max_pages_size, type: Integer, desc: 'Maximum size of pages in MB'
+        optional :container_registry_token_expire_delay, type: Integer, desc: 'Authorization token duration (minutes)'
+        optional :metrics_enabled, type: Boolean, desc: 'Enable the InfluxDB metrics'
+        given metrics_enabled: ->(val) { val } do
+          requires :metrics_host, type: String, desc: 'The InfluxDB host'
+          requires :metrics_port, type: Integer, desc: 'The UDP port to use for connecting to InfluxDB'
+          requires :metrics_pool_size, type: Integer, desc: 'The amount of InfluxDB connections to open'
+          requires :metrics_timeout, type: Integer, desc: 'The amount of seconds after which an InfluxDB connection will time out'
+          requires :metrics_method_call_threshold, type: Integer, desc: 'A method call is only tracked when it takes longer to complete than the given amount of milliseconds.'
+          requires :metrics_sample_interval, type: Integer, desc: 'The sampling interval in seconds'
+          requires :metrics_packet_size, type: Integer, desc: 'The amount of points to store in a single UDP packet'
+        end
+        optional :sidekiq_throttling_enabled, type: Boolean, desc: 'Enable Sidekiq Job Throttling'
+        given sidekiq_throttling_enabled: ->(val) { val } do
+          requires :sidekiq_throttling_queus, type: Array[String], desc: 'Choose which queues you wish to throttle'
+          requires :sidekiq_throttling_factor, type: Float, desc: 'The factor by which the queues should be throttled. A value between 0.0 and 1.0, exclusive.'
+        end
+        optional :recaptcha_enabled, type: Boolean, desc: 'Helps prevent bots from creating accounts'
+        given recaptcha_enabled: ->(val) { val } do
+          requires :recaptcha_site_key, type: String, desc: 'Generate site key at http://www.google.com/recaptcha'
+          requires :recaptcha_private_key, type: String, desc: 'Generate private key at http://www.google.com/recaptcha'
+        end
+        optional :akismet_enabled, type: Boolean, desc: 'Helps prevent bots from creating issues'
+        given akismet_enabled: ->(val) { val } do
+          requires :akismet_api_key, type: String, desc: 'Generate API key at http://www.akismet.com'
+        end
+        optional :admin_notification_email, type: String, desc: 'Abuse reports will be sent to this address if it is set. Abuse reports are always available in the admin area.'
+        optional :sentry_enabled, type: Boolean, desc: 'Sentry is an error reporting and logging tool which is currently not shipped with GitLab, get it here: https://getsentry.com'
+        given sentry_enabled: ->(val) { val } do
+          requires :sentry_dsn, type: String, desc: 'Sentry Data Source Name'
+        end
+        optional :repository_storage, type: String, desc: 'Storage paths for new projects'
+        optional :repository_checks_enabled, type: Boolean, desc: "GitLab will periodically run 'git fsck' in all project and wiki repositories to look for silent disk corruption issues."
+        optional :koding_enabled, type: Boolean, desc: 'Enable Koding'
+        given koding_enabled: ->(val) { val } do
+          requires :koding_url, type: String, desc: 'The Koding team URL'
+        end
+        optional :plantuml_enabled, type: Boolean, desc: 'Enable PlantUML'
+        given plantuml_enabled: ->(val) { val } do
+          requires :plantuml_url, type: String, desc: 'The PlantUML server URL'
+        end
+        optional :version_check_enabled, type: Boolean, desc: 'Let GitLab inform you when an update is available.'
+        optional :email_author_in_body, type: Boolean, desc: 'Some email servers do not support overriding the email sender name. Enable this option to include the name of the author of the issue, merge request or comment in the email body instead.'
+        optional :html_emails_enabled, type: Boolean, desc: 'By default GitLab sends emails in HTML and plain text formats so mail clients can choose what format to use. Disable this option if you only want to send emails in plain text format.'
+        optional :housekeeping_enabled, type: Boolean, desc: 'Enable automatic repository housekeeping (git repack, git gc)'
+        given housekeeping_enabled: ->(val) { val } do
+          requires :housekeeping_bitmaps_enabled, type: Boolean, desc: "Creating pack file bitmaps makes housekeeping take a little longer but bitmaps should accelerate 'git clone' performance."
+          requires :housekeeping_incremental_repack_period, type: Integer, desc: "Number of Git pushes after which an incremental 'git repack' is run."
+          requires :housekeeping_full_repack_period, type: Integer, desc: "Number of Git pushes after which a full 'git repack' is run."
+          requires :housekeeping_gc_period, type: Integer, desc: "Number of Git pushes after which 'git gc' is run."
+        end
+        optional :terminal_max_session_time, type: Integer, desc: 'Maximum time for web terminal websocket connection (in seconds). Set to 0 for unlimited time.'
+        at_least_one_of :default_branch_protection, :default_project_visibility, :default_snippet_visibility,
+                        :default_group_visibility, :restricted_visibility_levels, :import_sources,
+                        :enabled_git_access_protocol, :gravatar_enabled, :default_projects_limit,
+                        :max_attachment_size, :session_expire_delay, :disabled_oauth_sign_in_sources,
+                        :user_oauth_applications, :user_default_external, :signup_enabled,
+                        :send_user_confirmation_email, :domain_whitelist, :domain_blacklist_enabled,
+                        :after_sign_up_text, :signin_enabled, :require_two_factor_authentication,
+                        :home_page_url, :after_sign_out_path, :sign_in_text, :help_page_text,
+                        :shared_runners_enabled, :max_artifacts_size, :max_pages_size, :container_registry_token_expire_delay,
+                        :metrics_enabled, :sidekiq_throttling_enabled, :recaptcha_enabled,
+                        :akismet_enabled, :admin_notification_email, :sentry_enabled,
+                        :repository_storage, :repository_checks_enabled, :koding_enabled, :plantuml_enabled,
+                        :version_check_enabled, :email_author_in_body, :html_emails_enabled,
+                        :housekeeping_enabled, :terminal_max_session_time
+      end
+      put "application/settings" do
+        if current_settings.update_attributes(declared_params(include_missing: false))
+          present current_settings, with: Entities::ApplicationSetting
+        else
+          render_validation_error!(current_settings)
+        end
+      end
+    end
+  end
+end
diff --git a/spec/requests/api/settings_spec.rb b/spec/requests/api/settings_spec.rb
index 411905edb49..11b4b718e2c 100644
--- a/spec/requests/api/settings_spec.rb
+++ b/spec/requests/api/settings_spec.rb
@@ -18,6 +18,9 @@ describe API::Settings, 'Settings', api: true  do
       expect(json_response['koding_url']).to be_nil
       expect(json_response['plantuml_enabled']).to be_falsey
       expect(json_response['plantuml_url']).to be_nil
+      expect(json_response['default_project_visibility']).to be_a String
+      expect(json_response['default_snippet_visibility']).to be_a String
+      expect(json_response['default_group_visibility']).to be_a String
     end
   end
 
@@ -37,6 +40,8 @@ describe API::Settings, 'Settings', api: true  do
           koding_url: 'http://koding.example.com',
           plantuml_enabled: true,
           plantuml_url: 'http://plantuml.example.com',
+          default_snippet_visibility: 'internal',
+          restricted_visibility_levels: ['public'],
           default_artifacts_expire_in: '2 days'
         expect(response).to have_http_status(200)
         expect(json_response['default_projects_limit']).to eq(3)
@@ -47,6 +52,8 @@ describe API::Settings, 'Settings', api: true  do
         expect(json_response['koding_url']).to eq('http://koding.example.com')
         expect(json_response['plantuml_enabled']).to be_truthy
         expect(json_response['plantuml_url']).to eq('http://plantuml.example.com')
+        expect(json_response['default_snippet_visibility']).to eq('internal')
+        expect(json_response['restricted_visibility_levels']).to eq(['public'])
         expect(json_response['default_artifacts_expire_in']).to eq('2 days')
       end
     end
diff --git a/spec/requests/api/v3/settings_spec.rb b/spec/requests/api/v3/settings_spec.rb
new file mode 100644
index 00000000000..a9fa5adac17
--- /dev/null
+++ b/spec/requests/api/v3/settings_spec.rb
@@ -0,0 +1,65 @@
+require 'spec_helper'
+
+describe API::V3::Settings, 'Settings', api: true  do
+  include ApiHelpers
+
+  let(:user) { create(:user) }
+  let(:admin) { create(:admin) }
+
+  describe "GET /application/settings" do
+    it "returns application settings" do
+      get v3_api("/application/settings", admin)
+      expect(response).to have_http_status(200)
+      expect(json_response).to be_an Hash
+      expect(json_response['default_projects_limit']).to eq(42)
+      expect(json_response['signin_enabled']).to be_truthy
+      expect(json_response['repository_storage']).to eq('default')
+      expect(json_response['koding_enabled']).to be_falsey
+      expect(json_response['koding_url']).to be_nil
+      expect(json_response['plantuml_enabled']).to be_falsey
+      expect(json_response['plantuml_url']).to be_nil
+    end
+  end
+
+  describe "PUT /application/settings" do
+    context "custom repository storage type set in the config" do
+      before do
+        storages = { 'custom' => 'tmp/tests/custom_repositories' }
+        allow(Gitlab.config.repositories).to receive(:storages).and_return(storages)
+      end
+
+      it "updates application settings" do
+        put v3_api("/application/settings", admin),
+          default_projects_limit: 3, signin_enabled: false, repository_storage: 'custom', koding_enabled: true, koding_url: 'http://koding.example.com',
+          plantuml_enabled: true, plantuml_url: 'http://plantuml.example.com'
+        expect(response).to have_http_status(200)
+        expect(json_response['default_projects_limit']).to eq(3)
+        expect(json_response['signin_enabled']).to be_falsey
+        expect(json_response['repository_storage']).to eq('custom')
+        expect(json_response['repository_storages']).to eq(['custom'])
+        expect(json_response['koding_enabled']).to be_truthy
+        expect(json_response['koding_url']).to eq('http://koding.example.com')
+        expect(json_response['plantuml_enabled']).to be_truthy
+        expect(json_response['plantuml_url']).to eq('http://plantuml.example.com')
+      end
+    end
+
+    context "missing koding_url value when koding_enabled is true" do
+      it "returns a blank parameter error message" do
+        put v3_api("/application/settings", admin), koding_enabled: true
+
+        expect(response).to have_http_status(400)
+        expect(json_response['error']).to eq('koding_url is missing')
+      end
+    end
+
+    context "missing plantuml_url value when plantuml_enabled is true" do
+      it "returns a blank parameter error message" do
+        put v3_api("/application/settings", admin), plantuml_enabled: true
+
+        expect(response).to have_http_status(400)
+        expect(json_response['error']).to eq('plantuml_url is missing')
+      end
+    end
+  end
+end