From 203932ec88974acf8d86541cf0357cf9fc013143 Mon Sep 17 00:00:00 2001 From: Michael Koziarski Date: Tue, 27 Feb 2007 23:16:06 +0000 Subject: Add File.atomic_write to prevent users from seeing half written files. Useful for situations like Page Caching and the like. [Koz] git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@6262 5ecf4fe2-1ee6-0310-87b1-e25e094e27de --- activesupport/test/core_ext/file_test.rb | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 activesupport/test/core_ext/file_test.rb (limited to 'activesupport/test/core_ext/file_test.rb') diff --git a/activesupport/test/core_ext/file_test.rb b/activesupport/test/core_ext/file_test.rb new file mode 100644 index 0000000000..a7a8324125 --- /dev/null +++ b/activesupport/test/core_ext/file_test.rb @@ -0,0 +1,29 @@ +require File.dirname(__FILE__) + '/../abstract_unit' + +class AtomicWriteTest < Test::Unit::TestCase + + def test_atomic_write_without_errors + contents = "Atomic Text" + File.atomic_write(file_name) do |file| + file.write(contents) + assert !File.exists?(file_name) + end + assert File.exists?(file_name) + assert_equal contents, File.read(file_name) + ensure + File.unlink(file_name) + end + + def test_atomic_write_doesnt_write_when_block_raises + File.atomic_write(file_name) do |file| + file.write("testing") + raise "something bad" + end + rescue + assert !File.exists?(file_name) + end + + def file_name + "atomic.file" + end +end -- cgit v1.2.3