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# This file tests that (old) standard library backports requiring doesn't break anything.
# It isn't relevant to Rubies > 2.0, since we stopped to backport stdlib.
if RUBY_VERSION < '2.0'
require 'stringio'
if RUBY_VERSION < '1.9'
require 'enumerator'
require 'generator' # Must require first, because of warning in Ruby 1.8.7 with `ruby -w -r generator -e ""`
end
require './test/test_helper'
$bogus = []
module Kernel
def require_with_bogus_extension(lib)
$bogus << lib
require_without_bogus_extension(lib)
end
alias_method :require_without_bogus_extension, :require
alias_method :require, :require_with_bogus_extension
if defined? BasicObject and BasicObject.superclass
BasicObject.send :undef_method, :require
BasicObject.send :undef_method, :require_with_bogus_extension
end
end
class AAA_TestBackportGuards < Test::Unit::TestCase
def setup
$VERBOSE = true
@prev, $stderr = $stderr, StringIO.new
end
def teardown
assert_equal '', $stderr.string
$stderr = @prev
end
EXCLUDE = %w[require require_with_backports require_without_backports] # Overriden in all circumstances to load the std-lib
EXCLUDE.map!(&:to_sym) if instance_methods.first.is_a?(Symbol)
# For some very strange reason, Hash[kvp.flatten] doesn't always work in 1.8.6??
def to_hash(key_value_pairs)
h = {}
key_value_pairs.each{|k,v| h[k] = v}
h
end
# This returns all user defined methods on klass.
# For Ruby 1.8.7 or below, it returns all methods, so we can at least check we are not adding new methods needlessly
def class_signature(klass)
list =
(klass.instance_methods - EXCLUDE).map{|m| [m, klass.instance_method(m)] } +
(klass.methods - EXCLUDE).map{|m| [".#{m}", klass.method(m) ]}
list.select!{|name, method| method.source_location } if UnboundMethod.method_defined? :source_location
to_hash(list)
end
CLASSES = [Array, Binding, Bignum, Dir, Comparable, Enumerable, FalseClass, Fixnum, Float, GC,
Hash, Integer, IO, Kernel, Math, MatchData, Method, Module, NilClass, Numeric,
ObjectSpace, Proc, Process, Range, Regexp, String, Struct, Symbol, TrueClass] +
[ENV, ARGF].map{|obj| class << obj; self; end }
case RUBY_VERSION
when '1.8.6'
when '1.8.7'
CLASSES << Enumerable::Enumerator
else
CLASSES << Enumerator
end
def digest
to_hash(
CLASSES.map { |klass| [klass, class_signature(klass)] }
)
end
def digest_delta(before, after)
delta = {}
before.each do |klass, methods|
compare = after[klass]
d = methods.map do |name, unbound|
name unless unbound == compare[name]
end + (compare.map(&:first) - methods.map(&:first))
d.compact!
delta[klass] = d unless d.empty?
end
delta unless delta.empty?
end
def lib_path(path)
unless ENV['AUTOPKGTEST_TMP'].nil? # running under autopkgtest
File.expand_path(File.join(Gem::Specification.find_by_name('backports').lib_dirs_glob, path), __FILE__)
else
File.expand_path("../../lib/#{path}", __FILE__)
end
end
# Order super important!
def test__1_abbrev_can_be_required_before_backports
assert require('abbrev')
assert !$LOADED_FEATURES.include?('backports')
end
# Order super important!
def test__2_backports_wont_override_unnecessarily
before = digest
latest = "2.4.0"
if RUBY_VERSION > '1.8.6'
main_version = [RUBY_VERSION, latest].min
unless File.exist?(lib_path("backports/#{main_version}.rb"))
main_version = main_version.sub(/\.\d+$/, '.0')
end
require 'backports/tools/deprecation'
Backports.warned = Hash.new(true)
require "backports/#{main_version}"
after = digest
assert_nil digest_delta(before, after)
end
if RUBY_VERSION < latest
require "backports"
after = digest
assert !digest_delta(before, after).nil?
end
end
if RUBY_VERSION < '1.9.2' # this backport wouldn't be necessary otherwise
def test_setlib_load_correctly_after_requiring_backports
path = lib_path("backports/1.9.2/stdlib/matrix.rb")
assert_equal false, $LOADED_FEATURES.include?(path)
assert_equal true, require('matrix')
assert_equal true, $bogus.include?("matrix")
assert_equal true, $LOADED_FEATURES.include?(path)
assert_equal false, require('matrix')
end
end
def test_setlib_load_correctly_before_requiring_backports_test
assert_equal true, $bogus.include?("abbrev")
path = lib_path("backports/2.0.0/stdlib/abbrev.rb")
assert_equal true, $LOADED_FEATURES.include?(path)
assert_equal false, require('abbrev')
end
def test_backports_does_not_interfere_for_libraries_without_backports_test
assert_equal true, require('scanf')
assert_equal false, require('scanf')
end
def test_load_correctly_new_libraries_test
path = lib_path("backports/2.0.0/stdlib/fake_stdlib_lib.rb")
assert_equal false, $LOADED_FEATURES.include?(path)
assert_equal true, require('fake_stdlib_lib')
assert_equal true, $LOADED_FEATURES.include?(path)
assert_equal false, require('fake_stdlib_lib')
end
def test_no_warnings
require 'ostruct'
require 'set'
require 'backports/1.8.7/array/each'
require 'backports/1.8.7/enumerator/next'
assert_equal 1, [1,2,3].each.next # [Bug #70]
end
end
end
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