Refactor file writing tests

spec/gitlab_keys_spec.rb

@@ -14,17 +14,12 @@ describe GitlabKeys do
     it { gitlab_keys.instance_variable_get(:@key_id).should == 'key-741' }
   end
 
-  context "file writing tests" do
-    before do
-      FileUtils.mkdir_p(File.dirname(tmp_authorized_keys_path))
-      open(tmp_authorized_keys_path, 'w') { |file| file.puts('existing content') }
-      gitlab_keys.stub(auth_file: tmp_authorized_keys_path)
-    end
 
   describe :add_key do
     let(:gitlab_keys) { build_gitlab_keys('add-key', 'key-741', 'ssh-rsa AAAAB3NzaDAxx2E') }
 
     it "adds a line at the end of the file" do
+      create_authorized_keys_fixture
       gitlab_keys.send :add_key
       auth_line = "command=\"#{ROOT_PATH}/bin/gitlab-shell key-741\",no-port-forwarding,no-X11-forwarding,no-agent-forwarding,no-pty ssh-rsa AAAAB3NzaDAxx2E"
       File.read(tmp_authorized_keys_path).should == "existing content\n#{auth_line}\n"
@@ -41,6 +36,7 @@ describe GitlabKeys do
     let(:gitlab_keys) { build_gitlab_keys('rm-key', 'key-741', 'ssh-rsa AAAAB3NzaDAxx2E') }
 
     it "removes the right line" do
+      create_authorized_keys_fixture
       other_line = "command=\"#{ROOT_PATH}/bin/gitlab-shell key-742\",options ssh-rsa AAAAB3NzaDAxx2E"
       open(tmp_authorized_keys_path, 'a') do |auth_file|
         auth_file.puts "command=\"#{ROOT_PATH}/bin/gitlab-shell key-741\",options ssh-rsa AAAAB3NzaDAxx2E"
@@ -55,7 +51,6 @@ describe GitlabKeys do
       gitlab_keys.send :rm_key
     end
   end
-  end
 
   describe :exec do
     it 'add-key arg should execute add_key method' do
@@ -95,6 +90,12 @@ describe GitlabKeys do
     end
   end
 
+  def create_authorized_keys_fixture
+    FileUtils.mkdir_p(File.dirname(tmp_authorized_keys_path))
+    open(tmp_authorized_keys_path, 'w') { |file| file.puts('existing content') }
+    gitlab_keys.stub(auth_file: tmp_authorized_keys_path)
+  end
+
   def tmp_authorized_keys_path
     File.join(ROOT_PATH, 'tmp', 'authorized_keys')
   end