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ruby/test/csv/test_encodings.rb

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#!/usr/bin/env ruby -w
# encoding: UTF-8
# tc_encodings.rb
#
# Created by James Edward Gray II on 2008-09-13.
# Copyright 2008 James Edward Gray II. You can redistribute or modify this code
# under the terms of Ruby's license.
require_relative "base"
class TestCSV::Encodings < TestCSV
extend DifferentOFS
def setup
super
require 'tempfile'
@temp_csv_file = Tempfile.new(%w"test_csv. .csv")
@temp_csv_path = @temp_csv_file.path
@temp_csv_file.close
end
def teardown
@temp_csv_file.close!
super
end
########################################
### Hand Test Some Popular Encodings ###
########################################
def test_parses_utf8_encoding
assert_parses( [ %w[ one two … ],
%w[ 1 … 3 ],
%w[ … 5 6 ] ], "UTF-8" )
end
def test_parses_latin1_encoding
assert_parses( [ %w[ one two Résumé ],
%w[ 1 Résumé 3 ],
%w[ Résumé 5 6 ] ], "ISO-8859-1" )
end
def test_parses_utf16be_encoding
assert_parses( [ %w[ one two … ],
%w[ 1 … 3 ],
%w[ … 5 6 ] ], "UTF-16BE" )
end
def test_parses_shift_jis_encoding
assert_parses( [ %w[ 一 二 三 ],
%w[ 四 五 六 ],
%w[ 七 八 九 ] ], "Shift_JIS" )
end
###########################################################
### Try Simple Reading for All Non-dummy Ruby Encodings ###
###########################################################
def test_reading_with_most_encodings
each_encoding do |encoding|
begin
assert_parses( [ %w[ abc def ],
%w[ ghi jkl ] ], encoding )
rescue Encoding::ConverterNotFoundError
fail("Failed to support #{encoding.name}.")
end
end
end
def test_regular_expression_escaping
each_encoding do |encoding|
begin
assert_parses( [ %w[ abc def ],
%w[ ghi jkl ] ], encoding, col_sep: "|" )
rescue Encoding::ConverterNotFoundError
fail("Failed to properly escape #{encoding.name}.")
end
end
end
def test_read_with_default_encoding
data = "abc"
default_external = Encoding.default_external
each_encoding do |encoding|
File.open(@temp_csv_path, "wb", encoding: encoding) {|f| f << data}
begin
no_warnings do
Encoding.default_external = encoding
end
result = CSV.read(@temp_csv_path)[0][0]
ensure
no_warnings do
Encoding.default_external = default_external
end
end
assert_equal(encoding, result.encoding)
end
end
#######################################################################
### Stress Test ASCII Compatible and Non-ASCII Compatible Encodings ###
#######################################################################
def test_auto_line_ending_detection
# arrange data to place a \r at the end of CSV's read ahead point
encode_for_tests([["a" * 509]], row_sep: "\r\n") do |data|
assert_equal("\r\n".encode(data.encoding), CSV.new(data).row_sep)
end
end
def test_csv_chars_are_transcoded
encode_for_tests([%w[abc def]]) do |data|
%w[col_sep row_sep quote_char].each do |csv_char|
assert_equal( "|".encode(data.encoding),
CSV.new(data, csv_char.to_sym => "|").send(csv_char) )
end
end
end
def test_parser_works_with_encoded_headers
encode_for_tests([%w[one two three], %w[1 2 3]]) do |data|
parsed = CSV.parse(data, headers: true)
assert( parsed.headers.all? { |h| h.encoding == data.encoding },
"Wrong data encoding." )
parsed.each do |row|
assert( row.fields.all? { |f| f.encoding == data.encoding },
"Wrong data encoding." )
end
end
end
def test_built_in_converters_transcode_to_utf_8_then_convert
encode_for_tests([%w[one two three], %w[1 2 3]]) do |data|
parsed = CSV.parse(data, converters: :integer)
assert( parsed[0].all? { |f| f.encoding == data.encoding },
"Wrong data encoding." )
assert_equal([1, 2, 3], parsed[1])
end
end
def test_built_in_header_converters_transcode_to_utf_8_then_convert
encode_for_tests([%w[one two three], %w[1 2 3]]) do |data|
parsed = CSV.parse( data, headers: true,
header_converters: :downcase )
assert( parsed.headers.all? { |h| h.encoding.name == "UTF-8" },
"Wrong data encoding." )
assert( parsed[0].fields.all? { |f| f.encoding == data.encoding },
"Wrong data encoding." )
end
end
def test_open_allows_you_to_set_encodings
encode_for_tests([%w[abc def]]) do |data|
# read and write in encoding
File.open(@temp_csv_path, "wb:#{data.encoding.name}") { |f| f << data }
CSV.open(@temp_csv_path, "rb:#{data.encoding.name}") do |csv|
csv.each do |row|
assert( row.all? { |f| f.encoding == data.encoding },
"Wrong data encoding." )
end
end
# read and write with transcoding
File.open(@temp_csv_path, "wb:UTF-32BE:#{data.encoding.name}") do |f|
f << data
end
CSV.open(@temp_csv_path, "rb:UTF-32BE:#{data.encoding.name}") do |csv|
csv.each do |row|
assert( row.all? { |f| f.encoding == data.encoding },
"Wrong data encoding." )
end
end
end
end
def test_foreach_allows_you_to_set_encodings
encode_for_tests([%w[abc def]]) do |data|
# read and write in encoding
File.open(@temp_csv_path, "wb", encoding: data.encoding) { |f| f << data }
CSV.foreach(@temp_csv_path, encoding: data.encoding) do |row|
row.each {|f| assert_equal(f.encoding, data.encoding)}
end
# read and write with transcoding
File.open(@temp_csv_path, "wb:UTF-32BE:#{data.encoding.name}") do |f|
f << data
end
CSV.foreach( @temp_csv_path,
encoding: "UTF-32BE:#{data.encoding.name}" ) do |row|
assert( row.all? { |f| f.encoding == data.encoding },
"Wrong data encoding." )
end
end
end
def test_read_allows_you_to_set_encodings
encode_for_tests([%w[abc def]]) do |data|
# read and write in encoding
File.open(@temp_csv_path, "wb:#{data.encoding.name}") { |f| f << data }
rows = CSV.read(@temp_csv_path, encoding: data.encoding.name)
assert( rows.flatten.all? { |f| f.encoding == data.encoding },
"Wrong data encoding." )
# read and write with transcoding
File.open(@temp_csv_path, "wb:UTF-32BE:#{data.encoding.name}") do |f|
f << data
end
rows = CSV.read( @temp_csv_path,
encoding: "UTF-32BE:#{data.encoding.name}" )
assert( rows.flatten.all? { |f| f.encoding == data.encoding },
"Wrong data encoding." )
end
end
#################################
### Write CSV in any Encoding ###
#################################
def test_can_write_csv_in_any_encoding
each_encoding do |encoding|
# test generate_line with encoding hint
begin
csv = %w[abc d|ef].map { |f| f.encode(encoding) }.
to_csv(col_sep: "|", encoding: encoding.name)
rescue Encoding::ConverterNotFoundError
next
end
assert_equal(encoding, csv.encoding)
# test generate_line with encoding guessing from fields
csv = %w[abc d|ef].map { |f| f.encode(encoding) }.to_csv(col_sep: "|")
assert_equal(encoding, csv.encoding)
# writing to files
data = encode_ary([%w[abc d,ef], %w[123 456 ]], encoding)
CSV.open(@temp_csv_path, "wb:#{encoding.name}") do |f|
data.each { |row| f << row }
end
assert_equal(data, CSV.read(@temp_csv_path, encoding: encoding.name))
end
end
def test_encoding_is_upgraded_during_writing_as_needed
data = ["foo".force_encoding("US-ASCII"), "\u3042"]
assert_equal("US-ASCII", data.first.encoding.name)
assert_equal("UTF-8", data.last.encoding.name)
assert_equal("UTF-8", data.join('').encoding.name)
assert_equal("UTF-8", data.to_csv.encoding.name)
end
def test_encoding_is_upgraded_for_ascii_content_during_writing_as_needed
data = ["foo".force_encoding("ISO-8859-1"), "\u3042"]
assert_equal("ISO-8859-1", data.first.encoding.name)
assert_equal("UTF-8", data.last.encoding.name)
assert_equal("UTF-8", data.join('').encoding.name)
assert_equal("UTF-8", data.to_csv.encoding.name)
end
private
def assert_parses(fields, encoding, options = { })
encoding = Encoding.find(encoding) unless encoding.is_a? Encoding
orig_fields = fields
fields = encode_ary(fields, encoding)
data = ary_to_data(fields, options)
parsed = CSV.parse(data, options)
assert_equal(fields, parsed)
parsed.flatten.each_with_index do |field, i|
assert_equal(encoding, field.encoding, "Field[#{i + 1}] was transcoded.")
end
File.open(@temp_csv_path, "wb") {|f| f.print(data)}
CSV.open(@temp_csv_path, "rb:#{encoding}", options) do |csv|
csv.each_with_index do |row, i|
assert_equal(fields[i], row)
end
end
begin
CSV.open(@temp_csv_path, "rb:#{encoding}:#{__ENCODING__}", options) do |csv|
csv.each_with_index do |row, i|
assert_equal(orig_fields[i], row)
end
end unless encoding == __ENCODING__
rescue Encoding::ConverterNotFoundError
end
options[:encoding] = encoding.name
CSV.open(@temp_csv_path, options) do |csv|
csv.each_with_index do |row, i|
assert_equal(fields[i], row)
end
end
options.delete(:encoding)
options[:external_encoding] = encoding.name
options[:internal_encoding] = __ENCODING__.name
begin
CSV.open(@temp_csv_path, options) do |csv|
csv.each_with_index do |row, i|
assert_equal(orig_fields[i], row)
end
end unless encoding == __ENCODING__
rescue Encoding::ConverterNotFoundError
end
end
def encode_ary(ary, encoding)
ary.map { |row| row.map { |field| field.encode(encoding) } }
end
def ary_to_data(ary, options = { })
encoding = ary.flatten.first.encoding
quote_char = (options[:quote_char] || '"').encode(encoding)
col_sep = (options[:col_sep] || ",").encode(encoding)
row_sep = (options[:row_sep] || "\n").encode(encoding)
ary.map { |row|
row.map { |field|
[quote_char, field.encode(encoding), quote_char].join('')
}.join(col_sep) + row_sep
}.join('').encode(encoding)
end
def encode_for_tests(data, options = { })
yield ary_to_data(encode_ary(data, "UTF-8"), options)
yield ary_to_data(encode_ary(data, "UTF-16BE"), options)
end
def each_encoding
Encoding.list.each do |encoding|
next if encoding.dummy? # skip "dummy" encodings
yield encoding
end
end
def no_warnings
old_verbose, $VERBOSE = $VERBOSE, nil
yield
ensure
$VERBOSE = old_verbose
end
end
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