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Testing Tar Package Generation and Extraction in jordansissel/fpm

This test suite validates the functionality of the tar package handling in FPM (Effing Package Management). It focuses on verifying tar file creation, naming conventions, and extraction behavior to ensure reliable package management operations.

Test Coverage Overview

The test coverage encompasses core tar package functionality, including file naming and extraction validation. Key test scenarios include:

Default output filename generation
Package metadata handling (name, version, architecture)
Tar extraction verification
Script directory absence validation

Implementation Analysis

The testing approach utilizes RSpec’s context-driven testing methodology with focused test cases. The implementation leverages RSpec’s describe blocks for logical grouping and before hooks for test setup. Notable patterns include temporary file handling and system command execution validation.

Technical Details

Testing tools and components:

RSpec for test framework
Stud::Temporary for temporary file management
FileUtils for file operations
System commands for tar extraction
English library for process status checking

Best Practices Demonstrated

The test suite demonstrates several testing best practices:

Proper test isolation using temporary directories
Resource cleanup in after blocks
Clear test case organization
Effective use of RSpec context blocks
Robust error handling for system operations

jordansissel/fpm

spec/fpm/package/tar_spec.rb

            
require "spec_setup"
require "fpm" # local
require "English" # for $CHILD_STATUS

describe FPM::Package::Tar do
  before do
    subject.name = "name"
    subject.version = "123"
    subject.architecture = "all"
    subject.iteration = "100"
  end

  describe "#to_s" do
    it "should have a default output filename" do
      insist { subject.to_s "NAME-VERSION-ITERATION.ARCH.TYPE"} == "name-123-100.all.tar"
    end
  end # describe to_s

  context 'when extracted' do
    let(:target) { Stud::Temporary.pathname + ".tar" }
    let(:output_dir) { Stud::Temporary.directory }
    before do
      subject.output( target)
      system("tar x -C '#{output_dir}' -f #{target}")
      raise "couldn't extract test tar" unless $CHILD_STATUS.success?
    end

    it "doesn't include a .scripts folder" do
      insist { Dir.exist?(File.join(output_dir, '.scripts')) } == false
    end

    after do
      FileUtils.rm_rf(output_dir)
      FileUtils.rm_rf(target)
    end
  end
end # describe FPM::Package::Tar