Class: Test::Unit::Data::ClassMethods::Loader

Inherits:
Object
  • Object
show all
Defined in:
lib/test/unit/data.rb

Instance Method Summary collapse

Constructor Details

#initialize(test_case) ⇒ Loader

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of Loader.



206
207
208
 
# File 'lib/test/unit/data.rb', line 206

def initialize(test_case)
  @test_case = test_case
end

Instance Method Details

#load(file_name) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Load data from file.

Parameters:

  • file_name (String) —

    full path to test data file. File format is automatically detected from filename extension.

Raises:

  • (ArgumentError) —

    if ‘file_name` is not supported file format.

See Also:



218
219
220
221
222
223
224
225
226
227
 
# File 'lib/test/unit/data.rb', line 218

def load(file_name)
  case File.extname(file_name).downcase
  when ".csv"
    load_csv(file_name)
  when ".tsv"
    load_tsv(file_name)
  else
    raise ArgumentError, "unsupported file format: <#{file_name}>"
  end
end

#load_csv(file_name) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Load data from CSV file.

There are 2 types of CSV file as following examples. First, there is a header on first row and it’s first column is “label”. Another, there is no header in the file.

Examples:

Load data from CSV file with header

# test-data.csv:
#  label,expected,target
#  empty string,true,""
#  plain string,false,hello
#
load_data("/path/to/test-data.csv")
def test_empty?(data)
  assert_equal(data["expected"], data["target"].empty?)
end

Load data from CSV file without header

# test-data-without-header.csv:
#  empty string,true,""
#  plain string,false,hello
#
load_data("/path/to/test-data-without-header.csv")
def test_empty?(data)
  expected, target = data
  assert_equal(expected, target.empty?)
end


258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
 
# File 'lib/test/unit/data.rb', line 258

def load_csv(file_name)
  require 'csv'
  first_row = true
  header = nil
  CSV.foreach(file_name) do |row|
    if first_row
      first_row = false
      if row.first == "label"
        header = row[1..-1]
        next
      end
    end

    set_test_data(header, row)
  end
end

#load_tsv(file_name) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Load data from TSV file.

There are 2 types of TSV file as following examples. First, there is a header on first row and it’s first column is “label”. Another, there is no header in the file.

Examples:

Load data from TSV file with header

# test-data.tsv:
#  label	expected	target
#  empty string	true	""
#  plain string	false	hello
#
load_data("/path/to/test-data.tsv")
def test_empty?(data)
  assert_equal(data["expected"], data["target"].empty?)
end

Load data from TSV file without header

# test-data-without-header.tsv:
#  empty string	true	""
#  plain string	false	hello
#
load_data("/path/to/test-data-without-header.tsv")
def test_empty?(data)
  expected, target = data
  assert_equal(expected, target.empty?)
end


304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
 
# File 'lib/test/unit/data.rb', line 304

def load_tsv(file_name)
  require "csv"
  if CSV.const_defined?(:VERSION)
    first_row = true
    header = nil
    CSV.foreach(file_name, :col_sep => "\t") do |row|
      if first_row
        first_row = false
        if row.first == "label"
          header = row[1..-1]
          next
        end
      end

      set_test_data(header, row)
    end
  else
    # for old CSV library
    first_row = true
    header = nil
    CSV.open(file_name, "r", "\t") do |row|
      if first_row
        first_row = false
        if row.first == "label"
          header = row[1..-1]
          next
        end
      end

      set_test_data(header, row)
    end
  end
end