brew/Library/Homebrew/test/test_language_module_requirement.rb

require "testing_env"
require "requirements/language_module_requirement"

class LanguageModuleRequirementTests < Homebrew::TestCase
  parallelize_me!

  def assert_deps_fail(spec)
    refute_predicate LanguageModuleRequirement.new(*spec.shift.reverse), :satisfied?
  end

  def assert_deps_pass(spec)
    assert_predicate LanguageModuleRequirement.new(*spec.shift.reverse), :satisfied?
  end

  def test_unique_deps_are_not_eql
    x = LanguageModuleRequirement.new(:node, "less")
    y = LanguageModuleRequirement.new(:node, "coffee-script")
    refute_eql x, y
    refute_equal x.hash, y.hash
  end

  def test_differing_module_and_import_name
    mod_name = "foo"
    import_name = "bar"
    l = LanguageModuleRequirement.new(:python, mod_name, import_name)
    assert_includes l.message, mod_name
    assert_includes l.the_test, "import #{import_name}"
  end

  def test_bad_perl_deps
    assert_deps_fail "notapackage" => :perl
  end

  def test_good_perl_deps
    assert_deps_pass "Env" => :perl
  end

  def test_bad_python_deps
    needs_python
    assert_deps_fail "notapackage" => :python
  end

  def test_good_python_deps
    needs_python
    assert_deps_pass "datetime" => :python
  end

  def test_bad_ruby_deps
    assert_deps_fail "notapackage" => :ruby
  end

  def test_good_ruby_deps
    assert_deps_pass "date" => :ruby
  end
end