Extract UI object tests to shared example group

spec/shared/command_with_ui_object.rb

@@ -0,0 +1,11 @@
+shared_examples_for "a command with a UI object" do
+
+  subject(:command) { described_class.new }
+
+  it "configures a default UI component" do
+    ui = command.ui
+    expect(ui.out_stream).to eq($stdout)
+    expect(ui.err_stream).to eq($stderr)
+  end
+
+end

spec/unit/command/export_spec.rb

@@ -16,10 +16,13 @@
 #
 
 require 'spec_helper'
+require 'shared/command_with_ui_object'
 require 'chef-dk/command/export'
 
 describe ChefDK::Command::Export do
 
+  it_behaves_like "a command with a UI object"
+
   let(:params) { [] }
 
   let(:command) do
@@ -47,12 +50,6 @@
       expect(command.debug?).to be(false)
     end
 
-    it "configures a default UI component" do
-      ui = command.ui
-      expect(ui.out_stream).to eq($stdout)
-      expect(ui.err_stream).to eq($stderr)
-    end
-
     context "when debug mode is set" do
 
       let(:params) { [ "path/to/export", "-D" ] }

spec/unit/command/install_spec.rb

@@ -16,10 +16,13 @@
 #
 
 require 'spec_helper'
+require 'shared/command_with_ui_object'
 require 'chef-dk/command/install'
 
 describe ChefDK::Command::Install do
 
+  it_behaves_like "a command with a UI object"
+
   let(:params) { [] }
 
   let(:command) do
@@ -34,12 +37,6 @@
     expect(command.debug?).to be(false)
   end
 
-  it "configures a default UI component" do
-    ui = command.ui
-    expect(ui.out_stream).to eq($stdout)
-    expect(ui.err_stream).to eq($stderr)
-  end
-
   context "when debug mode is set" do
 
     let(:params) { [ "-D" ] }

spec/unit/command/push_spec.rb

@@ -16,10 +16,13 @@
 #
 
 require 'spec_helper'
+require 'shared/command_with_ui_object'
 require 'chef-dk/command/push'
 
 describe ChefDK::Command::Push do
 
+  it_behaves_like "a command with a UI object"
+
   let(:policy_group) { "dev" }
 
   let(:params) { [policy_group] }
@@ -51,12 +54,6 @@
       expect(command.debug?).to be(false)
     end
 
-    it "configures a default UI component" do
-      ui = command.ui
-      expect(ui.out_stream).to eq($stdout)
-      expect(ui.err_stream).to eq($stderr)
-    end
-
     describe "when configuring components that depend on chef config" do
 
       before do

spec/unit/command/update_spec.rb

@@ -16,10 +16,13 @@
 #
 
 require 'spec_helper'
+require 'shared/command_with_ui_object'
 require 'chef-dk/command/update'
 
 describe ChefDK::Command::Update do
 
+  it_behaves_like "a command with a UI object"
+
   let(:params) { [] }
 
   let(:command) do
@@ -34,12 +37,6 @@
     expect(command.debug?).to be(false)
   end
 
-  it "configures a default UI component" do
-    ui = command.ui
-    expect(ui.out_stream).to eq($stdout)
-    expect(ui.err_stream).to eq($stderr)
-  end
-
   context "when debug mode is set" do
 
     let(:params) { [ "-D" ] }