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Methods
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Instance Public methods
fixture_file_upload(path, mime_type = nil, binary = false)

Shortcut for Rack::Test::UploadedFile.new(File.join(ActionDispatch::IntegrationTest.fixture_path, path), type):

post :change_avatar, avatar: fixture_file_upload('files/spongebob.png', 'image/png')

To upload binary files on Windows, pass :binary as the last parameter. This will not affect other platforms:

post :change_avatar, avatar: fixture_file_upload('files/spongebob.png', 'image/png', :binary)
# File actionpack/lib/action_dispatch/testing/test_process.rb, line 16
def fixture_file_upload(path, mime_type = nil, binary = false)
  if self.class.respond_to?(:fixture_path) && self.class.fixture_path &&
      !File.exist?(path)
    path = File.join(self.class.fixture_path, path)
  end
  Rack::Test::UploadedFile.new(path, mime_type, binary)
end