RSpec: how to test file operations and file content

Question

In my app, I have the following code:

File.open "filename", "w" do |file|
  file.write("text")
end

I want to te

Answer 1

You can use fakefs.

It stubs filesystem and creates files in memory

You check with

File.exists? "filename" 

if file was created.

You can also just read it with

File.open 

and run expectation on its contents.