Implement `mkdir' task action

spec/producer/core/actions/mkdir_spec.rb

@@ -0,0 +1,23 @@
+require 'spec_helper'
+
+module Producer::Core
+  describe Actions::Mkdir do
+    let(:env)       { Env.new }
+    let(:path)      { 'some_path' }
+    subject(:mkdir) { Actions::Mkdir.new(env, path) }
+
+    describe '#apply' do
+      it 'creates directory on remote filesystem' do
+        expect(mkdir.fs).to receive(:mkdir).with(path)
+        mkdir.apply
+      end
+    end
+
+    describe '#path' do
+      it 'returns the path' do
+        expect(mkdir.path).to eq path
+      end
+    end
+  end
+end
+

spec/producer/core/remote/fs_spec.rb

@@ -112,6 +112,18 @@ module Producer::Core
       end
     end
 
+    describe '#mkdir' do
+      let(:sftp)  { double 'sftp' }
+      let(:path)  { 'some_directory_path' }
+
+      before { allow(fs).to receive(:sftp) { sftp } }
+
+      it 'creates the directory' do
+        expect(sftp).to receive(:mkdir!).with(path)
+        fs.mkdir path
+      end
+    end
+
     describe '#file_write' do
       let(:sftp)    { double('sftp').as_null_object }
       let(:file)    { double('sftp').as_null_object }

spec/producer/core/task/dsl_spec.rb

@@ -6,7 +6,7 @@ module Producer::Core
     let(:env)     { Env.new }
     subject(:dsl) { Task::DSL.new(env, &block) }
 
-    %w[echo sh file_write].each do |action|
+    %w[echo sh mkdir file_write].each do |action|
       it "has `#{action}' action defined" do
         expect(dsl).to respond_to action.to_sym
       end