Implement `has_dir' condition keyword

features/steps/remote_steps.rb

@@ -1,3 +1,7 @@
+Given /^a remote directory named "([^"]+)"$/ do |path|
+  create_dir path
+end
+
 Given /^a remote file named "([^"]+)"$/ do |file_name|
   write_file file_name, ''
 end

features/tests/has_dir.feature

@@ -0,0 +1,23 @@
+@sshd
+Feature: `has_dir' condition keyword
+
+  Background:
+    Given a recipe with:
+      """
+      target 'some_host.test'
+
+      task :testing_directory_existence do
+        condition { has_dir 'some_directory' }
+
+        echo 'evaluated'
+      end
+      """
+
+  Scenario: succeeds when directory exists
+    Given a remote directory named "some_directory"
+    When I successfully execute the recipe
+    Then the output must contain "evaluated"
+
+  Scenario: fails when directory does not exist
+    When I successfully execute the recipe
+    Then the output must not contain "evaluated"

lib/producer/core.rb

@@ -6,6 +6,7 @@ require 'producer/core/actions/file_writer'
 
 # condition tests (need to be defined before the condition DSL)
 require 'producer/core/test'
+require 'producer/core/tests/has_dir'
 require 'producer/core/tests/has_env'
 require 'producer/core/tests/has_file'
 

lib/producer/core/condition/dsl.rb

@@ -14,6 +14,7 @@ module Producer
         end
 
         define_test :has_env,   Tests::HasEnv
+        define_test :has_dir,   Tests::HasDir
         define_test :has_file,  Tests::HasFile
 
         attr_reader :block, :env, :tests

lib/producer/core/tests/has_dir.rb

@@ -0,0 +1,11 @@
+module Producer
+  module Core
+    module Tests
+      class HasDir < Test
+        def verify
+          fs.dir? arguments.first
+        end
+      end
+    end
+  end
+end

spec/producer/core/condition/dsl_spec.rb

@@ -6,7 +6,7 @@ module Producer::Core
     let(:env)     { double 'env' }
     subject(:dsl) { Condition::DSL.new(env, &block) }
 
-    %w[has_env has_file].each do |test|
+    %w[has_dir has_env has_file].each do |test|
       it "has `#{test}' test defined" do
         expect(dsl).to respond_to test.to_sym
       end

spec/producer/core/tests/has_dir_spec.rb

@@ -0,0 +1,28 @@
+require 'spec_helper'
+
+module Producer::Core
+  describe Tests::HasDir do
+    let(:env)         { Env.new }
+    let(:path)        { 'some_directory' }
+    subject(:has_dir) { Tests::HasDir.new(env, path) }
+
+    it 'is a kind of test' do
+      expect(has_dir).to be_a Test
+    end
+
+    describe '#verify', :ssh do
+      before { sftp_story }
+
+      it 'delegates the call on remote FS' do
+        expect(env.remote.fs).to receive(:dir?).with(path)
+        has_dir.verify
+      end
+
+      it 'returns the dir existence' do
+        existence = double 'existence'
+        allow(env.remote.fs).to receive(:dir?) { existence }
+        expect(has_dir.verify).to be existence
+      end
+    end
+  end
+end