module Test
module Unit
module Data
class << self
def included(base)
base.extend(ClassMethods)
end
end
module ClassMethods
# This method provides Data-Driven-Test functionality.
#
# Define test data in the test code.
#
# @overload data(label, data)
# @param [String] label specify test case name.
# @param data specify test data.
#
# @example data(label, data)
# data("empty string", [true, ""])
# data("plain string", [false, "hello"])
# def test_empty?(data)
# expected, target = data
# assert_equal(expected, target.empty?)
# end
#
# @overload data(data_set)
# @param [Hash] data_set specify test data as a Hash that
# key is test label and value is test data.
#
# @example data(data_set)
# data("empty string" => [true, ""],
# "plain string" => [false, "hello"])
# def test_empty?(data)
# expected, target = data
# assert_equal(expected, target.empty?)
# end
#
# @overload data(&block)
# @yieldreturn [Hash] return test data set as a Hash that
# key is test label and value is test data.
#
# @example data(&block)
# data do
# data_set = {}
# data_set["empty string"] = [true, ""]
# data_set["plain string"] = [false, "hello"]
# data_set
# end
# def test_empty?(data)
# expected, target = data
# assert_equal(expected, target.empty?)
# end
#
def data(*arguments, &block)
n_arguments = arguments.size
case n_arguments
when 0
raise ArgumentError, "no block is given" unless block_given?
data_set = block
when 1
data_set = arguments[0]
when 2
data_set = {arguments[0] => arguments[1]}
else
message = "wrong number arguments(#{n_arguments} for 1..2)"
raise ArgumentError, message
end
current_data = current_attribute(:data)[:value] || []
attribute(:data, current_data + [data_set])
end
# This method provides Data-Driven-Test functionality.
#
# Load test data from the file. This is shorthand to load
# test data from file. If you want to load complex file, you
# can use {#data} with block.
#
# @param [String] file_name full path to test data file.
# File format is automatically detected from filename extension.
# @raise [ArgumentError] if +file_name+ is not supported file format.
# @see Loader#load
#
# @example Load data from CSV file
# load_data("/path/to/test-data.csv")
# def test_empty?(data)
# assert_equal(data["expected"], data["target"].empty?)
# end
#
def load_data(file_name)
loader = Loader.new(self)
loader.load(file_name)
end
class Loader
# @api private
def initialize(test_case)
@test_case = test_case
end
# Load data from file.
#
# @param [String] file_name full path to test data file.
# File format is automatically detected from filename extension.
# @raise [ArgumentError] if +file_name+ is not supported file format.
# @see #load_csv
# @see #load_tsv
# @api private
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 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.
#
# @example 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
#
# @example 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
#
# @api private
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 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.
#
# @example 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
#
# @example 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
#
# @api private
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
private
def normalize_value(value)
return true if value == "true"
return false if value == "false"
begin
Integer(value)
rescue ArgumentError
begin
Float(value)
rescue ArgumentError
value
end
end
end
def set_test_data(header, row)
label = row.shift
if header
data = {}
header.each_with_index do |key, i|
data[key] = normalize_value(row[i])
end
else
data = row.collect do |cell|
normalize_value(cell)
end
end
@test_case.data(label, data)
end
end
end
end
end
end
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