brew/Library/Homebrew/test/test_dependency.rb

require 'testing_env'
require 'dependencies'

class DependableTests < Test::Unit::TestCase
  def setup
    @tags = ["foo", "bar", :build]
    @dep = Struct.new(:tags).new(@tags).extend(Dependable)
  end

  def test_options
    assert_equal %w{--foo --bar}.sort, @dep.options.sort
  end

  def test_interrogation
    assert @dep.build?
    assert !@dep.optional?
    assert !@dep.recommended?
  end
end

class DependencyTests < Test::Unit::TestCase
  def test_accepts_single_tag
    dep = Dependency.new("foo", "bar")
    assert_equal %w{bar}, dep.tags
  end

  def test_accepts_multiple_tags
    dep = Dependency.new("foo", %w{bar baz})
    assert_equal %w{bar baz}.sort, dep.tags.sort
  end

  def test_preserves_symbol_tags
    dep = Dependency.new("foo", :build)
    assert_equal [:build], dep.tags
  end

  def test_accepts_symbol_and_string_tags
    dep = Dependency.new("foo", [:build, "bar"])
    assert_equal [:build, "bar"], dep.tags
  end

  def test_equality
    foo1 = Dependency.new("foo")
    foo2 = Dependency.new("foo")
    bar = Dependency.new("bar")
    assert_equal foo1, foo2
    assert foo1.eql?(foo2)
    assert_not_equal foo1, bar
    assert !foo1.eql?(bar)
  end
end