feat: dependant toggles

.github/workflows/pull_request.yml

@@ -50,7 +50,7 @@ jobs:
       - name: Install dependencies
         run: bundle install
       - name: Download test cases
-        run: git clone --depth 5 --branch v4.3.3 https://github.com/Unleash/client-specification.git client-specification
+        run: git clone --depth 5 --branch v4.5.1 https://github.com/Unleash/client-specification.git client-specification
       - name: Run tests
         run: bundle exec rake
         env:

README.md

@@ -528,7 +528,7 @@ You can also run `bin/console` for an interactive prompt that will allow you to
 This SDK is also built against the Unleash Client Specification tests.
 To run the Ruby SDK against this test suite, you'll need to have a copy on your machine, you can clone the repository directly using:
 
-`git clone --depth 5 --branch v4.3.3 https://github.com/Unleash/client-specification.git client-specification`
+`git clone --depth 5 --branch v4.5.1 https://github.com/Unleash/client-specification.git client-specification`
 
 After doing this, `rake spec` will also run the client specification tests.
 

lib/unleash/client.rb

@@ -41,7 +41,6 @@ def is_enabled?(feature, context = nil, default_value_param = false, &fallback_b
                       end
 
       toggle_as_hash = Unleash&.toggles&.select{ |toggle| toggle['name'] == feature }&.first
-
       if toggle_as_hash.nil?
         Unleash.logger.debug "Unleash::Client.is_enabled? feature: #{feature} not found"
         return default_value

lib/unleash/configuration.rb

@@ -53,7 +53,7 @@ def http_headers
       {
         'UNLEASH-INSTANCEID' => self.instance_id,
         'UNLEASH-APPNAME' => self.app_name,
-        'Unleash-Client-Spec' => '4.2.2'
+        'Unleash-Client-Spec' => '4.5.1'
       }.merge!(generate_custom_http_headers)
     end
 

lib/unleash/feature_toggle.rb

@@ -7,7 +7,7 @@
 
 module Unleash
   class FeatureToggle
-    attr_accessor :name, :enabled, :strategies, :variant_definitions
+    attr_accessor :name, :enabled, :dependencies, :strategies, :variant_definitions
 
     FeatureEvaluationResult = Struct.new(:enabled?, :strategy)
 
@@ -16,6 +16,7 @@ def initialize(params = {}, segment_map = {})
 
       self.name       = params.fetch('name', nil)
       self.enabled    = params.fetch('enabled', false)
+      self.dependencies = params.fetch('dependencies', [])
 
       self.strategies = initialize_strategies(params, segment_map)
       self.variant_definitions = initialize_variant_definitions(params)
@@ -75,9 +76,47 @@ def am_enabled?(context)
       evaluate(context).enabled?
     end
 
+    def parent_dependencies_satisfied?(context)
+      return true if dependencies.empty?
+      return dependencies.all? do |parent|
+        evaluate_parenthood(parent, context)
+      end
+    end
+
+    def evaluate_parenthood(parent, context)
+      parent_toggle = get_parent(parent["feature"])
+      if parent_toggle.nil?
+        return false
+      end
+      return false unless parent_toggle.dependencies.empty?
+      evaluation_result = parent_toggle.is_enabled?(context)
+      if parent["enabled"] == false
+        return !evaluation_result
+      else
+        return false unless evaluation_result
+      end
+
+      unless parent["variants"].nil? || parent["variants"].empty?
+        return parent["variants"].include?(parent_toggle.get_variant(context).name)
+      end
+      return evaluation_result
+    end
+
+    def get_parent(feature)
+      toggle_as_hash = Unleash&.toggles&.select{ |toggle| toggle['name'] == feature }&.first
+      if toggle_as_hash.nil?
+        Unleash.logger.debug "Unleash::Client.is_enabled? feature: #{feature} not found"
+        return nil
+      end
+
+      Unleash::FeatureToggle.new(toggle_as_hash, Unleash&.segment_cache)
+    end
+
     def evaluate(context)
       evaluation_result =
-        if !self.enabled
+        if !parent_dependencies_satisfied?(context)
+          FeatureEvaluationResult.new(false, nil)
+        elsif !self.enabled
           FeatureEvaluationResult.new(false, nil)
         elsif self.strategies.empty?
           FeatureEvaluationResult.new(true, nil)
@@ -88,7 +127,6 @@ def evaluate(context)
 
       Unleash.logger.debug "Unleash::FeatureToggle (enabled:#{self.enabled}) " \
         "and Strategies combined with constraints returned #{evaluation_result})"
-
       evaluation_result
     end
 

spec/unleash/client_specification_spec.rb

@@ -47,12 +47,12 @@
           variant_tests = current_test_set.fetch('variantTests', [])
           variant_tests.each do |test|
             it "test that #{test['description']}" do
-              test_toggle = unleash_toggles.select{ |t| t.fetch('name', '') == test.fetch('toggleName') }.first
+              Unleash.toggles = unleash_toggles
+              Unleash.segment_cache = state_segments
 
-              toggle = Unleash::FeatureToggle.new(test_toggle, state_segments)
               context = Unleash::Context.new(test['context'])
 
-              variant = toggle.get_variant(context, DEFAULT_VARIANT)
+              variant = unleash_client.get_variant(test.fetch('toggleName'), context)
 
               expect(variant).to eq(Unleash::Variant.new(test['expectedResult']))
             end

spec/unleash/configuration_spec.rb

@@ -146,7 +146,7 @@
           'X-API-KEY' => '123',
           'UNLEASH-APPNAME' => 'test-app',
           'UNLEASH-INSTANCEID' => config.instance_id,
-          'Unleash-Client-Spec' => '4.2.2'
+          'Unleash-Client-Spec' => '4.5.1'
         }
       )
       expect(custom_headers_proc).to have_received(:call).exactly(1).times