Add a /ping resource and a few CIJoe::Server tests.

README.markdown

@@ -83,6 +83,18 @@ Or do it the old fashion way:
     etc.
 
 
+Checkin' Status
+---------------
+
+Want to see how your build's doing without any of this fancy UI crap?
+Ping Joe for the lowdown:
+
+    curl http://localhost:4567/ping
+
+Joe will return `200 OK` if all is quiet on the Western Front. If
+Joe's busy building or your last build failed, you'll get `412
+PRECONDITION FAILED`.
+
 Multiple Projects
 -----------------
 

Rakefile

@@ -16,6 +16,7 @@ begin
     gemspec.authors = ["Chris Wanstrath"]
     gemspec.add_dependency 'choice'
     gemspec.add_dependency 'sinatra'
+    gemspec.add_development_dependency 'rack-test'
     gemspec.version = CIJoe::Version.to_s
   end
 rescue LoadError

lib/cijoe/server.rb

@@ -3,6 +3,8 @@
 
 class CIJoe
   class Server < Sinatra::Base
+    attr_reader :joe
+
     dir = File.dirname(File.expand_path(__FILE__))
 
     set :views,  "#{dir}/views"
@@ -12,6 +14,14 @@ class Server < Sinatra::Base
 
     before { @joe.restore }
 
+    get '/ping' do
+      if @joe.building? || !@joe.last_build || !@joe.last_build.worked?
+        halt 412, joe.last_build ? joe.last_build.sha : "building"
+      end
+
+      joe.last_build.sha
+    end
+
     get '/?' do
       erb(:template, {}, :joe => @joe)
     end

test/helper.rb

@@ -5,5 +5,8 @@
 $LOAD_PATH.unshift(File.join(File.dirname(__FILE__), '..', 'lib'))
 require 'cijoe'
 
+CIJoe::Server.set :project_path, "."
+CIJoe::Server.set :environment,  "test"
+
 class Test::Unit::TestCase
 end

test/test_cijoe_server.rb

@@ -0,0 +1,50 @@
+require "helper"
+require "rack/test"
+require "cijoe/server"
+
+class TestCIJoeServer < Test::Unit::TestCase
+  include Rack::Test::Methods
+
+  class ::CIJoe
+    attr_writer :current_build, :last_build
+  end
+
+  attr_accessor :app
+
+  def setup
+    @app = CIJoe::Server.new
+  end
+
+  def test_ping
+    app.joe.last_build = build :worked
+    assert !app.joe.building?, "have a last build, but not a current"
+
+    get "/ping"
+    assert_equal 200, last_response.status
+    assert_equal app.joe.last_build.sha, last_response.body
+  end
+
+  def test_ping_building
+    app.joe.current_build = build :building
+    assert app.joe.building?, "buildin' a awsum project"
+
+    get "/ping"
+    assert_equal 412, last_response.status
+    assert_equal "building", last_response.body
+  end
+
+  def test_ping_failed
+    app.joe.last_build = build :failed
+
+    get "/ping"
+    assert_equal 412, last_response.status
+    assert_equal app.joe.last_build.sha, last_response.body
+  end
+
+  # Create a new, fake build. All we care about is status.
+
+  def build status
+    CIJoe::Build.new "user", "project", Time.now, Time.now,
+      "deadbeef", status, "output", 1337
+  end
+end