Add test for interoperability with Archive::Tar::Minitar.

ruby-xz.gemspec

@@ -44,6 +44,7 @@ DESCRIPTION
   spec.required_ruby_version = ">=1.9.3"
   spec.add_runtime_dependency("ffi", "~> 1.9")
   spec.add_runtime_dependency("io-like", "~> 0.3")
+  spec.add_development_dependency("archive-tar-minitar", "~> 0.5")
   spec.files.concat(Dir["lib/**/*.rb"])
   spec.files.concat(Dir["**/*.rdoc"])
   spec.files << "COPYING" << "AUTHORS"

test/test_tarball.rb

@@ -0,0 +1,71 @@
+# -*- coding: utf-8 -*-
+# (The MIT license)
+#
+# Basic liblzma-bindings for Ruby.
+#
+# Copyright © 2012,2013 Marvin Gülker
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the ‘Software’),
+# to deal in the Software without restriction, including without limitation
+# the rights to use, copy, modify, merge, publish, distribute, sublicense,
+# and/or sell copies of the Software, and to permit persons to whom the Software
+# is furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED ‘AS IS’, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+require "archive/tar/minitar"
+require_relative "./common"
+
+# Create XZ-compressed tarballs and unpack them with the system's
+# tar(1) utility, and vice-versa. This ensures our library interacts
+# with the environment as one expects it to.
+class TarballTest < Minitest::Test
+
+  def test_pack_tarball
+    filename = File.join(Dir.pwd, "testtarball.tar.xz")
+    content  = File.read("test-data/lorem_ipsum.txt")
+
+    XZ::StreamWriter.open(filename) do |txz|
+      Archive::Tar::Minitar.pack("test-data/lorem_ipsum.txt", txz)
+    end
+
+    Dir.mktmpdir("testtarball") do |dir|
+      Dir.chdir(dir) do
+        system("tar -xJf '#{filename}'")
+        assert File.exist?("test-data/lorem_ipsum.txt"), "compressed file missing!"
+        assert_equal File.read("test-data/lorem_ipsum.txt"), content
+      end
+    end
+  ensure
+    File.unlink(filename) if File.exist?(filename)
+  end
+
+  def test_unpack_tarball
+    filename = File.join(Dir.pwd, "testtarball.tar.xz")
+    content  = File.read("test-data/lorem_ipsum.txt")
+
+    system("tar -cJf '#{filename}' test-data/lorem_ipsum.txt")
+
+    Dir.mktmpdir("testtarball") do |dir|
+      Dir.chdir(dir) do
+        XZ::StreamReader.open(filename) do |txz|
+          Archive::Tar::Minitar.unpack(txz, ".")
+        end
+
+        assert File.exist?("test-data/lorem_ipsum.txt"), "compresed file missing!"
+        assert_equal File.read("test-data/lorem_ipsum.txt"), content
+      end
+    end
+  end
+
+end