unrar 5.1.1

Closes Homebrew/homebrew#27696.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Formula/unrar.rb

@@ -2,11 +2,25 @@ require 'formula'
 
 class Unrar < Formula
   homepage 'http://www.rarlab.com'
-  url 'http://www.rarlab.com/rar/unrarsrc-5.0.14.tar.gz'
-  sha1 'f6826b330668698fca227b3331e2bab564932d7e'
+  url 'http://www.rarlab.com/rar/unrarsrc-5.1.1.tar.gz'
+  sha1 '7d1a8691336208d1d9b85812ba7d5336d2986376'
 
   def install
     system "make"
     bin.install 'unrar'
   end
+
+  test do
+    contentpath = "directory/file.txt"
+    rarpath = testpath/"archive.rar"
+    data =  'UmFyIRoHAM+QcwAADQAAAAAAAACaCHQggDIACQAAAAkAAAADtPej1LZwZE' +
+            'QUMBIApIEAAGRpcmVjdG9yeVxmaWxlLnR4dEhvbWVicmV3CsQ9ewBABwA='
+
+    rarpath.write data.unpack('m')
+    assert_equal contentpath, `#{bin}/unrar lb #{rarpath}`.strip
+    assert_equal 0, $?.exitstatus
+
+    system "#{bin}/unrar", "x", rarpath, testpath
+    assert_equal "Homebrew\n", (testpath/contentpath).read
+  end
 end