WIP to get the deb package tested

Runs an Ubuntu 14.04 docker image and installs the package and runs
lsf pointed at our local lumberjack server.

This test is currently breaking because we aren't generating an
ssl certificate with an IP SAN.

Fixes elastic/logstash-forwarder#402

spec/lumberjack_spec.rb

@@ -6,17 +6,13 @@
 require "stud/try"
 require "stud/temporary"
 
-describe "lumberjack" do
+shared_examples_for "logstash-forwarder" do
   # TODO(sissel): Refactor this to use factory pattern instead of so many 'let' statements.
-  let(:ssl_certificate) { Stud::Temporary.pathname("ssl_certificate") }
-  let(:ssl_key) { Stud::Temporary.pathname("ssl_key") }
-  let(:config_file) { Stud::Temporary.pathname("config_file") }
-  let(:input_file) { Stud::Temporary.pathname("input_file") }
-
-  let(:lsf) do
-    # Start the process, return the pid
-    lsf = IO.popen(["./logstash-forwarder", "-config", config_file, "-quiet"])
-  end
+  let(:workdir) { Stud::Temporary.directory }
+  let(:ssl_certificate) { File.join(workdir, "certificate.pem") }
+  let(:ssl_key) { File.join(workdir, "certificate.key") }
+  let(:config_file) { File.join(workdir, "config.json") }
+  let(:input_file) { File.join(workdir, "input.log") }
 
   let(:random_field) { (rand(30)+1).times.map { (rand(26) + 97).chr }.join }
   let(:random_value) { (rand(30)+1).times.map { (rand(26) + 97).chr }.join }
@@ -54,7 +50,7 @@
   end
 
   before do
-    system("openssl req -x509  -batch -nodes -newkey rsa:2048 -keyout #{ssl_key} -out #{ssl_certificate} -subj /CN=localhost > /dev/null 2>&1")
+    system("openssl req -x509  -batch -nodes -newkey rsa:2048 -keyout #{ssl_key} -out #{ssl_certificate} -subj /CN=localhost #{redirect}")
 
     File.write(config_file, logstash_forwarder_config)
     lsf
@@ -81,6 +77,7 @@
     # TODO(sissel): Make sure this doesn't take forever, do a timeout.
     count = 0
     events = []
+    p :connection => connection
     connection.run do |event|
       events << event
       connection.close if events.length == lines.length
@@ -95,3 +92,53 @@
     end
   end
 end
+
+describe "operation" do
+  let(:redirect) { ENV["DEBUG"] ? "" : "> /dev/null 2>&1" }
+  context "when compiled from source" do
+    let(:lsf) do
+      # Start the process, return the pid
+      IO.popen(["./logstash-forwarder", "-config", config_file, "-quiet"])
+    end
+    it_behaves_like "logstash-forwarder" do
+    end
+  end
+
+  context "when installed from a deb", :deb => true do
+    let (:deb) { Dir.glob(File.join(File.dirname(__FILE__), "..", "*.deb")).first }
+    let(:container_name) { "lsf-spec-#{$$}" }
+    let(:lsf) do
+      args = ["docker", "run", "--name", container_name, "-v", "#{workdir}:#{workdir}", "-i", "ubuntu:14.04", "/bin/bash"]
+      IO.popen(args, "wb")
+    end
+
+    it_behaves_like "logstash-forwarder" do
+      before do
+        if !File.exist?("logstash-forwarder")
+          system("make logstash-forwarder #{redirect}") 
+          expect($?).to(be_success)
+        end
+        system("make deb #{redirect}")
+        expect($?).to(be_success)
+        expect(File).to(be_exist(deb))
+
+        FileUtils.cp(deb, workdir)
+        lsf.write("dpkg -i #{workdir}/#{File.basename(deb)}\n")
+
+        # Put a custom config for testing
+        ip = JSON.parse(`docker inspect #{container_name}`)[0]["NetworkSettings"]["Gateway"]
+        lsf.write("sed -e 's/localhost:/#{ip}:/' #{config_file} > /etc/logstash-forwarder.conf\n")
+
+        # Start lsf
+        lsf.write("/etc/init.d/logstash-forwarder start\n")
+
+        # Watch the logs
+        lsf.write("tail -F /var/log/logstash-forwarder.{err,log}\n")
+      end
+
+      after do
+        system("docker", "kill", container_name)
+      end
+    end
+  end
+end