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# frozen_string_literal: true
require_relative 'test_helper'
# Kernel test class
class KernelTest < Minitest::Test
include FakeFS
def teardown
FakeFS.deactivate!
FakeFS::FileSystem.clear
end
def test_can_exec_normally
silence_warnings do
out = open("|echo 'foo'")
assert_equal "foo\n", out.gets
end
end
def test_fake_kernel_can_create_subprocesses
FakeFS do
silence_warnings do
out = open("|echo 'foo'")
assert_equal "foo\n", out.gets
end
end
end
def test_fake_kernel_can_create_new_file
FakeFS do
FileUtils.mkdir_p '/path/to/'
open('/path/to/file', 'w') do |f|
f << 'test'
end
assert_kind_of FakeFile, FileSystem.fs['path']['to']['file']
end
end
def test_fake_kernel_can_do_stuff
FakeFS do
FileUtils.mkdir_p('/tmp')
File.open('/tmp/a', 'w+') { |f| f.puts 'test' }
begin
open('/tmp/a').read
rescue StandardError => e
raise e
end
end
end
def test_kernel_open_remains_private
refute 'foo'.respond_to?(:open), 'String#open should be private'
end
def test_can_exec_normally2
silence_warnings do
out = open("|echo 'foo'")
assert_equal "foo\n", out.gets
end
end
def test_kernel_open_can_handle_kwargs_after_deactivation
FakeFS.deactivate!
open('/dev/null', autoclose: true)
end
end
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