Ja/add skip

Gemfile.lock

@@ -1,11 +1,11 @@
 PATH
   remote: .
   specs:
-    mongo_aggregation_dsl (1.1.0)
+    mongo_aggregation_dsl (1.2.0)
       autoloaded (~> 2)
       contracts-lite
       mongo
-      mongoid (~> 8)
+      mongoid (~> 7.3)
 
 GEM
   remote: https://rubygems.org/
@@ -65,9 +65,9 @@ GEM
     minitest (5.17.0)
     mongo (2.18.2)
       bson (>= 4.14.1, < 5.0.0)
-    mongoid (8.0.3)
+    mongoid (7.5.2)
       activemodel (>= 5.1, < 7.1, != 7.0.0)
-      mongo (>= 2.18.0, < 3.0.0)
+      mongo (>= 2.10.5, < 3.0.0)
       ruby2_keywords (~> 0.0.5)
     multi_xml (0.6.0)
     octokit (6.0.1)

lib/aggregate/stages/skip.rb

@@ -0,0 +1,18 @@
+# frozen_string_literal: true
+
+module Aggregate
+  module Stages
+    # Represents an aggregation skip
+    # https://www.mongodb.com/docs/manual/reference/operator/aggregation/skip/
+    class Skip < Base
+      Contract Integer => Any
+      def initialize(options)
+        super(options)
+      end
+
+      def transpose
+        { '$skip': options }
+      end
+    end
+  end
+end

mongo_aggregation_dsl.gemspec

@@ -2,7 +2,7 @@
 
 Gem::Specification.new do |spec|
   spec.name = "mongo_aggregation_dsl"
-  spec.version = "1.1.0"
+  spec.version = "1.2.0"
   spec.authors = ["KrimsonKla"]
   spec.email   = ["[email protected]"]
   spec.date = "2018-09-10"
@@ -20,7 +20,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency "autoloaded", "~> 2"
   spec.add_dependency "contracts-lite"
   spec.add_dependency "mongo"
-  spec.add_dependency "mongoid", "~> 8"
+  spec.add_dependency "mongoid", "~> 7.3"
 
   spec.add_development_dependency "codecov", "~> 0.1", "~> 0.6.0"
   spec.add_development_dependency "database_cleaner"

spec/aggregate/stages/limit_spec.rb

@@ -2,7 +2,7 @@
 
 require "rails_helper"
 
-RSpec.describe Aggregate::Stages::Group do
+RSpec.describe Aggregate::Stages::Limit do
   describe "#transpose" do
     it "should properly format" do
       expect(

spec/aggregate/stages/skip_spec.rb

@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+require "rails_helper"
+
+RSpec.describe Aggregate::Stages::Skip do
+  describe "#transpose" do
+    it "should properly format" do
+      expect(
+        Aggregate::Stages::Skip.new(5).transpose
+      ).to eq('$skip': 5)
+    end
+  end
+  describe "schema" do
+    it "should raise if option is not an integer" do
+      expect { Aggregate::Stages::Skip.new("test") }.to raise_error(ParamContractError)
+    end
+    it "does not raise if option is an integer" do
+      expect { Aggregate::Stages::Skip.new(1) }.not_to raise_error
+    end
+  end
+end