#--
# Copyright (c) 2012-2013 Philip Ross
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#++

require File.join(File.expand_path(File.dirname(__FILE__)), 'test_utils')
require 'tmpdir'

include TZInfo

class TCDataSource < Test::Unit::TestCase
  class InitDataSource < DataSource
  end
  
  class DummyDataSource < DataSource
  end
  
  def setup
    @orig_data_source = DataSource.get
    DataSource.set(InitDataSource.new)
    @orig_search_path = ZoneinfoDataSource.search_path.clone
  end
  
  def teardown
    DataSource.set(@orig_data_source)
    ZoneinfoDataSource.search_path = @orig_search_path
  end
  
  def test_get
    data_source = DataSource.get
    assert_kind_of(InitDataSource, data_source)
  end
  
  def test_get_default_ruby_only    
    code = <<-EOF
      require 'tmpdir'
      
      begin
        Dir.mktmpdir('tzinfo_test_dir') do |dir|
          TZInfo::ZoneinfoDataSource.search_path = [dir]
          
          puts TZInfo::DataSource.get.class
        end
      rescue Exception => e
        puts "Unexpected exception: \#{e}"
      end
    EOF
    
    assert_sub_process_returns(['TZInfo::RubyDataSource'], code, [TZINFO_TEST_DATA_DIR])
  end
  
  def test_get_default_zoneinfo_only
    code = <<-EOF
      require 'tmpdir'
      
      begin
        Dir.mktmpdir('tzinfo_test_dir') do |dir|
          TZInfo::ZoneinfoDataSource.search_path = [dir, '#{TZINFO_TEST_ZONEINFO_DIR}']
          
          puts TZInfo::DataSource.get.class
          puts TZInfo::DataSource.get.zoneinfo_dir
        end
      rescue Exception => e
        puts "Unexpected exception: \#{e}"
      end
    EOF
    
    assert_sub_process_returns(
      ['TZInfo::ZoneinfoDataSource', TZINFO_TEST_ZONEINFO_DIR], 
      code)
  end
  
  def test_get_default_ruby_and_zoneinfo
    code = <<-EOF
      begin
        TZInfo::ZoneinfoDataSource.search_path = ['#{TZINFO_TEST_ZONEINFO_DIR}']
          
        puts TZInfo::DataSource.get.class
      rescue Exception => e
        puts "Unexpected exception: \#{e}"
      end
    EOF
    
    assert_sub_process_returns(['TZInfo::RubyDataSource'], code, [TZINFO_TEST_DATA_DIR])
  end
  
  def test_get_default_no_data
    code = <<-EOF
      require 'tmpdir'
      
      begin
        Dir.mktmpdir('tzinfo_test_dir') do |dir|
          TZInfo::ZoneinfoDataSource.search_path = [dir]
          
          begin
            data_source = TZInfo::DataSource.get
            puts "No exception raised, returned \#{data_source} instead"
          rescue Exception => e
            puts e.class
          end
        end
      rescue Exception => e
        puts "Unexpected exception: \#{e}"
      end
    EOF
    
    assert_sub_process_returns(['TZInfo::DataSourceNotFound'], code)
  end
  
  def test_set_instance
    DataSource.set(DummyDataSource.new)
    data_source = DataSource.get
    assert_kind_of(DummyDataSource, data_source)
  end
  
  def test_set_standard_ruby
    DataSource.set(:ruby)
    data_source = DataSource.get
    assert_kind_of(RubyDataSource, data_source)
  end
  
  def test_set_standard_zoneinfo_search
    Dir.mktmpdir('tzinfo_test_dir') do |dir|
      FileUtils.touch(File.join(dir, 'iso3166.tab'))
      FileUtils.touch(File.join(dir, 'zone.tab'))
              
      ZoneinfoDataSource.search_path = [dir]
      
      DataSource.set(:zoneinfo)
      data_source = DataSource.get
      assert_kind_of(ZoneinfoDataSource, data_source)
      assert_equal(dir, data_source.zoneinfo_dir)      
    end
  end
  
  def test_set_standard_zoneinfo_explicit
    Dir.mktmpdir('tzinfo_test_dir') do |dir|
      FileUtils.touch(File.join(dir, 'iso3166.tab'))
      FileUtils.touch(File.join(dir, 'zone.tab'))      
      
      DataSource.set(:zoneinfo, dir)
      data_source = DataSource.get
      assert_kind_of(ZoneinfoDataSource, data_source)
      assert_equal(dir, data_source.zoneinfo_dir)      
    end
  end
  
  def test_set_standard_zoneinfo_search_not_found
    Dir.mktmpdir('tzinfo_test_dir') do |dir|
      ZoneinfoDataSource.search_path = [dir]
      
      assert_raises(ZoneinfoDirectoryNotFound) do
        DataSource.set(:zoneinfo)
      end
      
      assert_kind_of(InitDataSource, DataSource.get)
    end
  end
  
  def test_set_standard_zoneinfo_explicit_invalid
    Dir.mktmpdir('tzinfo_test_dir') do |dir|
      assert_raises(InvalidZoneinfoDirectory) do
        DataSource.set(:zoneinfo, dir)
      end
      
      assert_kind_of(InitDataSource, DataSource.get)      
    end
  end
  
  def test_set_standard_zoneinfo_wrong_arg_count
    assert_raises(ArgumentError) do
      DataSource.set(:zoneinfo, 1, 2)
    end
    
    assert_kind_of(InitDataSource, DataSource.get)
  end
end