First socket spec

bin/spin

@@ -1,6 +1,10 @@
+#!/usr/bin/env ruby
+
+require 'spin/socket'
+
 # requires
 # parse options
-# at_exit { rm socketfile }
+at_exit { File.delete(Spin::Socket.filepath) }
 # signal handlers
 # spawn file watcher w/ pipe
 # preload rails

lib/spin/socket.rb

@@ -0,0 +1,16 @@
+# A Spin::Socket wraps a Unix socket
+
+require 'tempfile' # for Dir::tmpdir
+require 'digest/md5'
+
+module Spin
+  class Socket
+    # This returns a path in the top level of the tmpdir with
+    # a name unique to spin and the pwd.
+    def self.filepath
+      slug = Digest::MD5.hexdigest ['spin', Dir.pwd].join('-')
+      [Dir::tmpdir, slug].join('/')
+    end
+  end
+end
+

spec/spin/socket_spec.rb

@@ -0,0 +1,24 @@
+require 'minitest/autorun'
+require_relative '../../lib/spin/socket'
+
+describe Spin::Socket do
+  describe '#filepath' do
+    before do
+      @filepath = Spin::Socket.filepath
+    end
+
+    it 'is in the tmpdir' do
+      p @filepath
+      @filepath.must_include Dir::tmpdir
+    end
+
+    it "includes a digested version of 'spin' and the pwd" do
+      @filepath.must_include digest("spin-#{Dir.pwd}")
+    end
+
+    def digest(string)
+      Digest::MD5.hexdigest(string)
+    end
+  end
+end
+