Implement `file_write' action

spec/producer/core/actions/file_writer_spec.rb

@@ -0,0 +1,29 @@
+require 'spec_helper'
+
+module Producer::Core
+  describe Actions::FileWriter do
+    let(:env)           { Env.new }
+    let(:path)          { 'some_path' }
+    let(:content)       { 'some_content' }
+    subject(:writer)    { Actions::FileWriter.new(env, path, content) }
+
+    describe '#apply' do
+      it 'delegates the call to env.remote.fs.file_write method' do
+        expect(env.remote.fs).to receive(:file_write).with(path, content)
+        writer.apply
+      end
+    end
+
+    describe '#path' do
+      it 'returns the path' do
+        expect(writer.path).to eq path
+      end
+    end
+
+    describe '#content' do
+      it 'returns the content' do
+        expect(writer.content).to eq content
+      end
+    end
+  end
+end

spec/producer/core/remote/fs_spec.rb

@@ -72,5 +72,30 @@ module Producer::Core
         end
       end
     end
+
+    describe '#file_write' do
+      let(:sftp)    { double('sftp').as_null_object }
+      let(:file)    { double('sftp').as_null_object }
+      let(:path)    { 'some_file_path' }
+      let(:content) { 'some_content' }
+
+      before do
+        allow(fs).to receive(:sftp) { sftp }
+        allow(sftp).to receive(:file) { file }
+      end
+
+      it 'opens the file' do
+        expect(file).to receive(:open).with(path, 'w')
+        fs.file_write path, content
+      end
+
+      it 'writes the content' do
+        expect(file).to receive(:open).with(any_args) do |&b|
+          expect(file).to receive(:write).with(content)
+          b.call file
+        end
+        fs.file_write path, content
+      end
+    end
   end
 end

spec/producer/core/remote_spec.rb

@@ -94,8 +94,7 @@ module Producer::Core
           ch.sends_exec command
           ch.gets_data arguments
         end
-        remote.execute command
-        expect(story_completed?).to be
+        expect_story_completed { remote.execute command }
       end
 
       it 'returns the output' do

spec/producer/core/task/dsl_spec.rb

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

spec/support/net_ssh_story_helpers.rb

@@ -29,10 +29,6 @@ module NetSSHStoryHelpers
     end
   end
 
-  def story_completed?
-    socket.script.events.empty?
-  end
-
   def sftp_story
     story do |session|
       ch = session.opens_channel
@@ -48,4 +44,11 @@ module NetSSHStoryHelpers
       yield ch if block_given?
     end
   end
+
+  def expect_story_completed
+    raise 'there is no story to expect' if socket.script.events.empty?
+    yield
+    expect(socket.script.events)
+      .to be_empty, "#{socket.script.events.count} story events still pending"
+  end
 end