ruby-on-railscapybararspec-railsfileutils

Puma: "Same File" error when testing filename edit using FileUtils.mv()

I'm writing unit tests for my Rails 5 app using Rspec and Capybara, and I'm currently stuck trying to test the ability to rename files uploaded to my controller. The app seems to work flawlessly: I have a Documents controller with an attached File thanks to Paperclip, and a view that allows the user to edit the filename (without the extension), so when the user clicks on the Save button, the controller uses FileUtils to "rename" the file:

@document = Document.find(params[:id])
path = @document.file.path
@document.file_file_name = params[:document][:filename] + '.' + params[:document][:extension]
@document.project_id = params[:document][:project_id]
@document.user_id = params[:document][:user_id]
FileUtils.mv(path, File.join(File.dirname(path), @document.file_file_name))

this has been thoroughly tested by several teammates and it doesn't break so far. However, the problem comes when trying to run my unit test:

RSpec.describe "documents/edit.html.erb", type: :feature do

# Creating user, document, and related models...

  it "edits a file as Admin" do
    sign_in @user_admin
    visit edit_document_path(@document)
    find('#document_filename').set('edited_filename')
    find("input[type=submit][value='Save']").click
    expect(page).to have_content("edited_filename.docx")
  end
end

And then, when I run the test, I get the following error:

Failures:

1) documents/edit.html.erb edits a file as Admin
   Failure/Error: FileUtils.mv(path, File.join(File.dirname(path), @document.file_file_name))

 ArgumentError:
   same file: /home/moyarzun/GarageLabs/lexgo/public/system/documents/files/000/000/001/original/test_file.docx and /home/moyarzun/GarageLabs/lexgo/public/system/documents/files/000/000/001/original/edited_filename.docx

This is not a Rails error, but a Puma one: https://i.sstatic.net/7dAxT.png

Any help will be appreciated.

Solution

  • I'm guessing /home/moyarzun/GarageLabs/lexgo/public/system/documents/files/000/000/001/original/test_file.docx is actually a soft link to a file elsewhere in the system, and that a link to the same file named /home/moyarzun/GarageLabs/lexgo/public/system/documents/files/000/000/001/original/edited_filename.docx already exists when you're running the test (because the tests aren't clearing out the links created each time it's run). If you try and move a link to another another link which is already linked to the same file you'll get the 'same file` argument error. You want to make sure you clean up files from tests when the tests complete (or before running the tests).