# my_gem_name.gemspec
require_relative "lib/my_gem_name/version"

Gem::Specification.new do |spec|
  spec.name          = "my_gem_name"
  spec.version       = MyGemName::VERSION
  spec.authors       = ["Your Name"]
  spec.email         = ["[email protected]"]

  spec.summary       = "A short summary of MyGemName."
  spec.description   = "A longer description of MyGemName."
  spec.homepage      = "https://github.com/yourusername/my_gem_name" # 你的 GitHub 倉庫或其他主頁
  spec.license       = "MIT"
  spec.required_ruby_version = Gem::Requirement.new(">= 2.3.0")

  # 指定哪些文件應該包含在 Gem 中
  spec.files         = Dir.chdir(File.expand_path(__dir__)) do
    `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
  end
  spec.bindir        = "exe"
  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
  spec.require_paths = ["lib"]

  # 運行時依賴
  # spec.add_dependency "rack", "~> 2.0"

  # 開發時依賴 (測試、文檔生成等)
  spec.add_development_dependency "bundler", "~> 2.0"
  spec.add_development_dependency "rake", "~> 13.0"
  spec.add_development_dependency "minitest", "~> 5.0"
end

# lib/my_gem_name.rb
require_relative "my_gem_name/version"

module MyGemName
  class Error < StandardError; end
  # 在這裡定義你的 Gem 邏輯
  def self.greet(name)
    "Hello, #{name} from MyGemName!"
  end
end

# lib/my_gem_name/version.rb
module MyGemName
  VERSION = "0.1.0"
end

# lib/my_gem_name/calculator.rb
module MyGemName
  class Calculator
    def add(a, b)
      a + b
    end

    def subtract(a, b)
      a - b
    end
  end
end

# lib/my_gem_name.rb
require_relative "my_gem_name/version"
require_relative "my_gem_name/calculator" # 引入新的文件

module MyGemName
  class Error < StandardError; end
  def self.greet(name)
    "Hello, #{name} from MyGemName!"
  end
end

require "minitest/autorun"
require "my_gem_name"

class MyGemNameTest < Minitest::Test
  def test_that_it_has_a_version_number
    refute_nil ::MyGemName::VERSION
  end

  def test_it_greets_correctly
    assert_equal "Hello, World from MyGemName!", MyGemName.greet("World")
  end

  def test_calculator_add
    calculator = MyGemName::Calculator.new
    assert_equal 5, calculator.add(2, 3)
  end
end