1 files changed, 30 insertions, 0 deletions
diff --git a/spec/models/project_setting_spec.rb b/spec/models/project_setting_spec.rb
index 5572304d666..d03eb3c8bfe 100644
--- a/spec/models/project_setting_spec.rb
+++ b/spec/models/project_setting_spec.rb
@@ -4,4 +4,34 @@ require 'spec_helper'
 
 RSpec.describe ProjectSetting, type: :model do
   it { is_expected.to belong_to(:project) }
+
+  describe 'validations' do
+    it { is_expected.not_to allow_value(nil).for(:target_platforms) }
+    it { is_expected.to allow_value([]).for(:target_platforms) }
+
+    it 'allows any combination of the allowed target platforms' do
+      valid_target_platform_combinations.each do |target_platforms|
+        expect(subject).to allow_value(target_platforms).for(:target_platforms)
+      end
+    end
+
+    [nil, 'not_allowed', :invalid].each do |invalid_value|
+      it { is_expected.not_to allow_value([invalid_value]).for(:target_platforms) }
+    end
+  end
+
+  describe 'target_platforms=' do
+    it 'stringifies and sorts' do
+      project_setting = build(:project_setting, target_platforms: [:watchos, :ios])
+      expect(project_setting.target_platforms).to eq %w(ios watchos)
+    end
+  end
+
+  def valid_target_platform_combinations
+    target_platforms = described_class::ALLOWED_TARGET_PLATFORMS
+
+    0.upto(target_platforms.size).flat_map do |n|
+      target_platforms.permutation(n).to_a
+    end
+  end
 end