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# frozen_string_literal: true
require 'rubygems/test_case'
require 'rubygems/util'
class TestGemUtil < Gem::TestCase
def test_class_popen
skip "MJIT executes process and it's caught by Process.wait(-1)" if defined?(RubyVM::MJIT) && RubyVM::MJIT.enabled?
assert_equal "0\n", Gem::Util.popen(Gem.ruby, '-I', File.expand_path('../../../lib', __FILE__), '-e', 'p 0')
assert_raises Errno::ECHILD do
Process.wait(-1)
end
end
def test_silent_system
assert_silent do
Gem::Util.silent_system Gem.ruby, '-I', File.expand_path('../../../lib', __FILE__), '-e', 'puts "hello"; warn "hello"'
end
end
def test_traverse_parents
FileUtils.mkdir_p 'a/b/c'
enum = Gem::Util.traverse_parents 'a/b/c'
assert_equal File.join(@tempdir, 'a/b/c'), enum.next
assert_equal File.join(@tempdir, 'a/b'), enum.next
assert_equal File.join(@tempdir, 'a'), enum.next
loop { break if enum.next.nil? } # exhaust the enumerator
end
def test_traverse_parents_does_not_crash_on_permissions_error
skip 'skipped on MS Windows (chmod has no effect)' if win_platform?
FileUtils.mkdir_p 'd/e/f'
# remove 'execute' permission from "e" directory and make it
# impossible to cd into it and its children
FileUtils.chmod(0666, 'd/e')
skip 'skipped in root privilege' if Process.uid.zero?
paths = Gem::Util.traverse_parents('d/e/f').to_a
assert_equal File.join(@tempdir, 'd'), paths[0]
assert_equal @tempdir, paths[1]
assert_equal File.realpath(Dir.tmpdir), paths[2]
assert_equal File.realpath("..", Dir.tmpdir), paths[3]
ensure
# restore default permissions, allow the directory to be removed
FileUtils.chmod(0775, 'd/e') unless win_platform?
end
def test_linked_list_find
list = [1,2,3,4,5].inject(Gem::List.new(0)) { |m,o|
Gem::List.new o, m
}
assert_equal 5, list.find { |x| x == 5 }
assert_equal 4, list.find { |x| x == 4 }
end
end
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