CODEWITHSUNDEEP
ruby-on-railsrubyrspec
ivan
ivan

Reputation: 29

How To test in rspec if file is deleted?

I would like to know how to test in rspec is specific file is deleted. Here is code that I am testing

def check_status
  filename = File.join('test', 'status.txt')
  File.delete(filename ) if File.exist?(filename)
end

Here is test: 

before do
  allow(File).to receive(:exist?).and_return(true)
  allow(File).to receive(:delete)
end

it {expect(File).to receive(:delete).with("test/status.txt") }

I am getting error 

(File (class)).delete("test/status.txt")
    expected: 1 time with arguments: ("test/status.txt")
    received: 0 times

Could you please help me with this issue. I am sure that my code delete the file, but in tests it receive it 0 times.

Upvotes: 1

Views: 1832

Answers (2)

kumar vk
kumar vk

Reputation: 1

updated question

 File.delete('status.txt') if File.exist?('status.txt')

Solution

context '#delete' do
    it 'deletes the file' do
      allow(File).to receive(:exist?).and_return(true)
      allow(File).to receive(:delete)
      expect(File).to receive(:delete).with("status.txt")
      # suppose check_status method is defined in TempClass
      delete = TempClass.new
      delete.check_status
    end
  end

Upvotes: 0

Mori
Mori

Reputation: 27779

From your spec, it appears that you are mocking and stubbing correctly, but you never call check_status, so the stubs and mocks don't get used. You could change your example to something like:

it 'deletes the file' do
  expect(File).to receive(:delete).with("test/status.txt")
  MyModel.check_status
end

It would be better still to test this with an actual file, instead of mocks and stubs, so that it also tests that the file is in the correct location, that you have the necessary permissions, etc.

Upvotes: 4

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