#!/usr/local/bin/ruby -w

# tc_interface.rb
#
#  Created by James Edward Gray II on 2005-11-14.
#  Copyright 2005 Gray Productions. All rights reserved.

require "test/unit"

require "faster_csv"

class TestFasterCSVInterface < Test::Unit::TestCase
  def setup
    @path = File.join(File.dirname(__FILE__), "temp_test_data.csv")
    
    File.open(@path, "w") do |file|
      file << "1\t2\t3\r\n"
      file << "4\t5\r\n"
    end

    @expected = [%w{1 2 3}, %w{4 5}]
  end
  
  def teardown
    File.unlink(@path)
  end
  
  ### Test Read Interface ###
  
  def test_foreach
    FasterCSV.foreach(@path, :col_sep => "\t", :row_sep => "\r\n") do |row|
      assert_equal(@expected.shift, row)
    end
  end
  
  def test_open_and_close
    csv = FasterCSV.open(@path, "r+", :col_sep => "\t", :row_sep => "\r\n")
    assert_not_nil(csv)
    assert_instance_of(FasterCSV, csv)
    assert_equal(false, csv.closed?)
    csv.close
    assert(csv.closed?)
    
    ret = FasterCSV.open(@path) do |csv|
      assert_instance_of(FasterCSV, csv)
      "Return value."
    end
    assert(csv.closed?)
    assert_equal("Return value.", ret)
  end
  
  def test_parse
    data = File.read(@path)
    assert_equal( @expected,
                  FasterCSV.parse(data, :col_sep => "\t", :row_sep => "\r\n") )

    FasterCSV.parse(data, :col_sep => "\t", :row_sep => "\r\n") do |row|
      assert_equal(@expected.shift, row)
    end
  end
  
  def test_parse_line
    row = FasterCSV.parse_line("1;2;3", :col_sep => ";")
    assert_not_nil(row)
    assert_instance_of(Array, row)
    assert_equal(%w{1 2 3}, row)
    
    # shortcut interface
    row = "1;2;3".parse_csv(:col_sep => ";")
    assert_not_nil(row)
    assert_instance_of(Array, row)
    assert_equal(%w{1 2 3}, row)
  end
  
  def test_read_and_readlines
    assert_equal( @expected,
                  FasterCSV.read(@path, :col_sep => "\t", :row_sep => "\r\n") )
    assert_equal( @expected,
                  FasterCSV.readlines( @path,
                                       :col_sep => "\t", :row_sep => "\r\n") )
    
    
    data = FasterCSV.open(@path, :col_sep => "\t", :row_sep => "\r\n") do |csv|
      csv.read
    end
    assert_equal(@expected, data)
    data = FasterCSV.open(@path, :col_sep => "\t", :row_sep => "\r\n") do |csv|
      csv.readlines
    end
    assert_equal(@expected, data)
  end
  
  def test_shift  # aliased as gets() and readline()
    FasterCSV.open(@path, "r+", :col_sep => "\t", :row_sep => "\r\n") do |csv|
      assert_equal(@expected.shift, csv.shift)
      assert_equal(@expected.shift, csv.shift)
      assert_equal(nil, csv.shift)
    end
  end
  
  ### Test Write Interface ###

  def test_generate
    str = FasterCSV.generate do |csv|  # default empty String
      assert_instance_of(FasterCSV, csv)
      assert_equal(csv, csv << [1, 2, 3])
      assert_equal(csv, csv << [4, nil, 5])
    end
    assert_not_nil(str)
    assert_instance_of(String, str)
    assert_equal("1,2,3\n4,,5\n", str)

    FasterCSV.generate(str) do |csv|   # appending to a String
      assert_equal(csv, csv << ["last", %Q{"row"}])
    end
    assert_equal(%Q{1,2,3\n4,,5\nlast,"""row"""\n}, str)
  end
  
  def test_generate_line
    line = FasterCSV.generate_line(%w{1 2 3}, :col_sep => ";")
    assert_not_nil(line)
    assert_instance_of(String, line)
    assert_equal("1;2;3\n", line)
    
    # shortcut interface
    line = %w{1 2 3}.to_csv(:col_sep => ";")
    assert_not_nil(line)
    assert_instance_of(String, line)
    assert_equal("1;2;3\n", line)
  end
  
  def test_append  # aliased add_row() and puts()
    File.unlink(@path)
    
    FasterCSV.open(@path, "w", :col_sep => "\t", :row_sep => "\r\n") do |csv|
      @expected.each { |row| csv << row }
    end

    test_shift
  end
  
  ### Test Read and Write Interface ###
  
  def test_filter
    assert_respond_to(FasterCSV, :filter)
    
    expected = [[1, 2, 3], [4, 5]]
    FasterCSV.filter( "1;2;3\n4;5\n", (result = String.new),
                      :in_col_sep => ";", :out_col_sep => ",",
                      :converters => :all ) do |row|
      assert_equal(row, expected.shift)
      row.map! { |n| n * 2 }
      row << "Added\r"
    end
    assert_equal("2,4,6,\"Added\r\"\n8,10,\"Added\r\"\n", result)
  end
end