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fake-file
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fake-file
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# fake-file [](https://rubygems.org/gems/fake-file) [](https://github.com/mdotvasylenchuk/fake-file/actions/workflows/main.yml) [](https://opensource.org/licenses/MIT) `fake-file` is a Ruby gem for generating temporary fake files for tests. It helps when you need to attach a file to a model (ActiveStorage, Shrine, CarrierWave, etc.) without storing fixture files in `spec/files`. Currently supported formats: - `pdf` - `docx` - `xlsx` ## Installation Add to your app's Gemfile: ```ruby gem "fake-file" ``` Then run: ```bash bundle install ``` Or install manually: ```bash gem install fake-file ``` ## Quick Start ```ruby require "fake-file" pdf_file = FakeFile.pdf docx_file = FakeFile.docx xlsx_file = FakeFile.xlsx ``` Each method returns a `Tempfile` object ready to use in tests. ## API ### Facade methods ```ruby FakeFile.pdf(options = {}) FakeFile.docx(options = {}) FakeFile.xlsx(options = {}) ``` ### Generic generator ```ruby FakeFile.generate(:pdf) FakeFile.generate(:docx) FakeFile.generate(:xlsx) ``` ### Rack::Test uploaded file helper ```ruby FakeFile.upload(:pdf) FakeFile.upload(:docx) FakeFile.upload(:xlsx) ``` Returns `Rack::Test::UploadedFile`, so you can use it directly in request specs. ## Usage in tests ### ActiveStorage example ```ruby it "attaches generated pdf" do file = FakeFile.pdf record.file.attach( io: file, filename: "sample.pdf", content_type: "application/pdf" ) expect(record.file).to be_attached end ``` ### Verify MIME type ```ruby require "marcel" expect(Marcel::MimeType.for(FakeFile.docx)) .to eq("application/vnd.openxmlformats-officedocument.wordprocessingml.document") ``` ### Request spec with Rack::Test ```ruby post "/imports", params: { file: FakeFile.upload(:xlsx) } ``` ## Adding a new format 1. Create a new generator class in `lib/fake-file/generators/`. 2. Inherit from `BaseGenerator` and implement `#generate`. 3. Register it in `lib/fake-file.rb`: ```ruby Registry.register(:txt, Generators::TxtGenerator.new) ``` After that, it becomes available via: ```ruby FakeFile.generate(:txt) ``` ## Development Install dependencies: ```bash bundle install ``` Run specs: ```bash ruby -S bundle exec rspec ``` Open console: ```bash bin/console ``` ## Contributing Issues and pull requests are welcome: - https://github.com/mdotvasylenchuk/fake-file Please follow [CODE_OF_CONDUCT.md](CODE_OF_CONDUCT.md). ## License The gem is distributed under the MIT license. See [LICENSE.txt](LICENSE.txt).
