Implement Testing::MockRemote#execute

spec/producer/core/testing/mock_remote_spec.rb

@@ -1,3 +1,4 @@
+require 'spec_helper'
 require 'producer/core/testing'
 
 module Producer::Core
@@ -14,6 +15,32 @@ module Producer::Core
           expect { remote.session }.to raise_error
         end
       end
+
+      describe '#execute' do
+        context 'dummy echo command' do
+          let(:command) { 'echo some arguments' }
+
+          it 'returns command arguments' do
+            expect(remote.execute(command)).to eq 'some arguments'
+          end
+        end
+
+        context 'dummy true command' do
+          let(:command) { 'true' }
+
+          it 'returns an empty string' do
+            expect(remote.execute(command)).to eq ''
+          end
+        end
+
+        context 'dummy false command' do
+          let(:command) { 'false' }
+
+          it 'raises a RemoteCommandExecutionError' do
+            expect { remote.execute(command) }.to raise_error(RemoteCommandExecutionError)
+          end
+        end
+      end
     end
   end
 end