brew/Library/Homebrew/test/unpack_strategy/zstd_spec.rb

# frozen_string_literal: true

require_relative "shared_examples"

RSpec.describe UnpackStrategy::Zstd do
  let(:path) { TEST_FIXTURE_DIR/"cask/container.tar.zst" }

  it "is correctly detected" do
    # `UnpackStrategy.detect(path)` for a `.tar.XXX` file returns either `UnpackStrategy::Tar` if
    # the host's `tar` is able to extract that compressed file or `UnpackStrategy::XXX` otherwise,
    # such as `UnpackStrategy::Zstd`. On macOS `UnpackStrategy.detect("container.tar.zst")`
    # returns `UnpackStrategy::Zstd` and on Ubuntu 22.04 it returns `UnpackStrategy::Tar`,
    # because the host's version of `tar` is recent enough and `zstd` is installed.
    expect(UnpackStrategy.detect(path)).to(be_a(described_class).or(be_a(UnpackStrategy::Tar)))
  end
end