Fix rubocop complains

lib/ci/gitlab_ci_yaml_processor.rb

@@ -100,6 +100,29 @@ module Ci
     end
 
     def validate!
+      validate_global!
+
+      @jobs.each do |name, job|
+        validate_job!(name, job)
+      end
+
+      true
+    end
+
+    def validate_job!(name, job)
+      validate_job_name!(name)
+      validate_job_keys!(name, job)
+      validate_job_types!(name, job)
+
+      validate_job_stage!(name, job) if job[:stage]
+      validate_job_cache!(name, job) if job[:cache]
+      validate_job_artifacts!(name, job) if job[:artifacts]
+      validate_job_dependencies!(name, job) if job[:dependencies]
+    end
+
+    private
+
+    def validate_global!
       unless validate_array_of_strings(@before_script)
         raise ValidationError, "before_script should be an array of strings"
       end
@@ -124,7 +147,10 @@ module Ci
         raise ValidationError, "variables should be a map of key-valued strings"
       end
 
-      if @cache
+      validate_global_cache! if @cache
+    end
+
+    def validate_global_cache!
       if @cache[:key] && !validate_string(@cache[:key])
         raise ValidationError, "cache:key parameter should be a string"
       end
@@ -138,26 +164,6 @@ module Ci
       end
     end
 
-      @jobs.each do |name, job|
-        validate_job!(name, job)
-      end
-
-      true
-    end
-
-    def validate_job!(name, job)
-      validate_job_name!(name)
-      validate_job_keys!(name, job)
-      validate_job_types!(name, job)
-
-      validate_job_stage!(name, job) if job[:stage]
-      validate_job_cache!(name, job) if job[:cache]
-      validate_job_artifacts!(name, job) if job[:artifacts]
-      validate_job_dependencies!(name, job) if job[:dependencies]
-    end
-
-    private
-
     def validate_job_name!(name)
       if name.blank? || !validate_string(name)
         raise ValidationError, "job name should be non-empty string"

spec/lib/ci/gitlab_ci_yaml_processor_spec.rb

@@ -295,12 +295,12 @@ module Ci
       
       describe "after_script" do
         context "in global context" do
-          let(:config) {
+          let(:config) do
             {
               after_script: ["after_script"],
               test: { script: ["script"] }
             }
-          }
+          end
 
           it "return after_script in options" do
             expect(subject[:options][:after_script]).to eq(["after_script"])