Implement `file_replace_content' task action

spec/producer/core/actions/file_replace_content_spec.rb

@@ -0,0 +1,49 @@
+require 'spec_helper'
+
+module Producer::Core
+  module Actions
+    describe FileReplaceContent, :env do
+      let(:path)        { 'some_path' }
+      let(:pattern)     { 'content' }
+      let(:replacement) { 'other content' }
+      let(:content)     { 'some content' }
+      subject(:action)  { FileReplaceContent.new(env, path, pattern, replacement) }
+
+      it_behaves_like 'action'
+
+      before { allow(remote_fs).to receive(:file_read).with(path) { content } }
+
+      describe '#apply' do
+        it 'writes replaced content to file on remote filesystem' do
+          expect(remote_fs)
+            .to receive(:file_write).with(path, action.replaced_content)
+          action.apply
+        end
+      end
+
+      describe '#path' do
+        it 'returns the file path' do
+          expect(action.path).to eq path
+        end
+      end
+
+      describe '#pattern' do
+        it 'returns the pattern' do
+          expect(action.pattern).to eq pattern
+        end
+      end
+
+      describe '#replacement' do
+        it 'returns the replacement' do
+          expect(action.replacement).to eq replacement
+        end
+      end
+
+      describe '#replaced_content' do
+        it 'returns content with pattern occurrences pattern replaced' do
+          expect(action.replaced_content).to eq 'some other content'
+        end
+      end
+    end
+  end
+end