Merge branch '4.0-socket-error' of https://github.com/sallustfire/redis-rb into 4.0

Author: djanowski

lib/redis/client.rb

@@ -340,6 +340,7 @@ def establish_connection
            Errno::EHOSTDOWN,
            Errno::EHOSTUNREACH,
            Errno::ENETUNREACH,
+           Errno::ENOENT,
            Errno::ETIMEDOUT
 
       raise CannotConnectError, "Error connecting to Redis on #{location} (#{$!.class})"

test/internals_test.rb

@@ -158,6 +158,13 @@ def test_connection_timeout
     assert (Time.now - start_time) <= opts[:timeout]
   end
 
+  def test_missing_socket
+    opts = { :path => '/missing.sock' }
+    assert_raise Redis::CannotConnectError do
+      Redis.new(opts).ping
+    end
+  end
+
   def close_on_ping(seq, options = {})
     $request = 0