test_class_methods.rb

require 'mini_exiftool'
require 'test/unit'
begin
  require 'turn'
rescue LoadError
end

class TestClassMethods < Test::Unit::TestCase

  def test_new
    assert_raises MiniExiftool::Error do
      MiniExiftool.new nil
    end
    assert_raises MiniExiftool::Error do
      MiniExiftool.new ''
    end
    assert_raises MiniExiftool::Error do
      MiniExiftool.new 'not_existing_file'
    end
    assert_raises MiniExiftool::Error do
      MiniExiftool.new '.' # directory
    end
    begin
      MiniExiftool.new 'not_existing_file'
    rescue MiniExiftool::Error => e
      assert_match /File 'not_existing_file' does not exist/, e.message
    end
    assert_raises MiniExiftool::Error do
      MiniExiftool.new __FILE__ # file type wich Exiftool can not handle
    end
    begin
      MiniExiftool.new __FILE__ # file type wich Exiftool can not handle
    rescue MiniExiftool::Error => e
      assert_match /Error: Unknown (?:image|file) type/, e.message
    end
  end

  def test_command
    cmd = MiniExiftool.command
    assert_equal 'exiftool', cmd
    MiniExiftool.command = 'non_existend'
    assert_equal 'non_existend', MiniExiftool.command
    assert_raises MiniExiftool::Error do
      met = MiniExiftool.new(File.join(File.dirname(__FILE__), 
                                       'data/test.jpg'))
    end
    MiniExiftool.command = cmd
  end

  def test_writable_tags
    w_tags = MiniExiftool.writable_tags
    assert w_tags.include?('ISO')
    assert_equal false, w_tags.include?('xxxxxx')
  end

  def test_exiftool_version
    v = MiniExiftool.exiftool_version
    assert_match /\A\d+\.\d+\z/, v
  end

end