require "testing_env"
require "formula"

class FormulaValidationTests < Homebrew::TestCase
  def assert_invalid(attr, &block)
    e = assert_raises(FormulaValidationError, &block)
    assert_equal attr, e.attr
  end

  def test_cant_override_brew
    e = assert_raises(RuntimeError) { formula { def brew; end } }
    assert_match(/You cannot override Formula#brew/, e.message)
  end

  def test_validates_name
    assert_invalid :name do
      formula "name with spaces" do
        url "foo"
        version "1.0"
      end
    end
  end

  def test_validates_url
    assert_invalid :url do
      formula do
        url ""
        version "1"
      end
    end
  end

  def test_validates_version
    assert_invalid :version do
      formula do
        url "foo"
        version "version with spaces"
      end
    end

    assert_invalid :version do
      formula do
        url "foo"
        version ""
      end
    end

    assert_invalid :version do
      formula do
        url "foo"
        version nil
      end
    end
  end

  def test_devel_only_valid
    f = formula do
      devel do
        url "foo"
        version "1.0"
      end
    end

    assert_predicate f, :devel?
  end

  def test_head_only_valid
    f = formula { head "foo" }
    assert_predicate f, :head?
  end

  def test_empty_formula_invalid
    assert_raises(FormulaSpecificationError) { formula {} }
  end
end